/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 13:42:22,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 13:42:22,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 13:42:22,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 13:42:22,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 13:42:22,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 13:42:22,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 13:42:22,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 13:42:22,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 13:42:22,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 13:42:22,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 13:42:22,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 13:42:22,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 13:42:22,884 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 13:42:22,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 13:42:22,884 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 13:42:22,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 13:42:22,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 13:42:22,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 13:42:22,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 13:42:22,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:42:22,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 13:42:22,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 13:42:22,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 13:42:22,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 13:42:22,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 13:42:22,886 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 13:42:22,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 13:42:22,886 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 13:42:22,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 13:42:23,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 13:42:23,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 13:42:23,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 13:42:23,096 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 13:42:23,097 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 13:42:23,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl [2022-02-16 13:42:23,098 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl' [2022-02-16 13:42:23,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 13:42:23,127 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 13:42:23,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 13:42:23,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 13:42:23,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 13:42:23,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/1) ... [2022-02-16 13:42:23,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/1) ... [2022-02-16 13:42:23,145 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 13:42:23,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 13:42:23,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 13:42:23,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 13:42:23,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 13:42:23,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/1) ... [2022-02-16 13:42:23,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/1) ... [2022-02-16 13:42:23,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/1) ... [2022-02-16 13:42:23,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/1) ... [2022-02-16 13:42:23,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/1) ... [2022-02-16 13:42:23,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/1) ... [2022-02-16 13:42:23,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/1) ... [2022-02-16 13:42:23,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 13:42:23,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 13:42:23,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 13:42:23,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 13:42:23,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/1) ... [2022-02-16 13:42:23,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:42:23,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:23,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-16 13:42:23,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-16 13:42:23,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 13:42:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 13:42:23,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 13:42:23,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 13:42:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 13:42:23,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 13:42:23,215 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 13:42:23,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 13:42:23,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 13:42:23,215 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 13:42:23,249 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 13:42:23,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 13:42:23,360 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 13:42:23,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 13:42:23,381 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-16 13:42:23,381 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-02-16 13:42:23,382 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-02-16 13:42:23,383 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:42:23 BoogieIcfgContainer [2022-02-16 13:42:23,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 13:42:23,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 13:42:23,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 13:42:23,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 13:42:23,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:42:23" (1/2) ... [2022-02-16 13:42:23,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2b439a and model type array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:42:23, skipping insertion in model container [2022-02-16 13:42:23,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:42:23" (2/2) ... [2022-02-16 13:42:23,401 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-symm.wvr.bpl [2022-02-16 13:42:23,405 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 13:42:23,405 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 13:42:23,405 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 13:42:23,405 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 13:42:23,445 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-16 13:42:23,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:42:23,492 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-16 13:42:23,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-16 13:42:23,500 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2022-02-16 13:42:23,513 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:23,618 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 436 transitions and produced 297 states. [2022-02-16 13:42:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 297 states, 242 states have (on average 1.5454545454545454) internal successors, (374), 296 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-16 13:42:23,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:23,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:23,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash -580385373, now seen corresponding path program 1 times [2022-02-16 13:42:23,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:23,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776087936] [2022-02-16 13:42:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:23,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:23,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:23,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776087936] [2022-02-16 13:42:23,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776087936] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:42:23,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:42:23,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 13:42:23,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528719608] [2022-02-16 13:42:23,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:42:23,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:42:23,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:23,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:42:23,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:42:23,792 INFO L87 Difference]: Start difference. First operand has 297 states, 242 states have (on average 1.5454545454545454) internal successors, (374), 296 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:23,924 INFO L93 Difference]: Finished difference Result 303 states and 374 transitions. [2022-02-16 13:42:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:42:23,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-02-16 13:42:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:23,934 INFO L225 Difference]: With dead ends: 303 [2022-02-16 13:42:23,935 INFO L226 Difference]: Without dead ends: 260 [2022-02-16 13:42:23,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:42:23,938 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:23,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-16 13:42:23,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 20. [2022-02-16 13:42:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 34 transitions. [2022-02-16 13:42:23,972 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 34 transitions. Word has length 10 [2022-02-16 13:42:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:23,972 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 34 transitions. [2022-02-16 13:42:23,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 34 transitions. [2022-02-16 13:42:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-16 13:42:23,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:23,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:23,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 13:42:23,973 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:23,974 INFO L85 PathProgramCache]: Analyzing trace with hash -481455773, now seen corresponding path program 2 times [2022-02-16 13:42:23,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:23,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741875235] [2022-02-16 13:42:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:23,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:24,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:24,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741875235] [2022-02-16 13:42:24,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741875235] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:42:24,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:42:24,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 13:42:24,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073035812] [2022-02-16 13:42:24,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:42:24,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:42:24,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:24,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:42:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:42:24,023 INFO L87 Difference]: Start difference. First operand 20 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:24,072 INFO L93 Difference]: Finished difference Result 36 states and 60 transitions. [2022-02-16 13:42:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:42:24,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-02-16 13:42:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:24,073 INFO L225 Difference]: With dead ends: 36 [2022-02-16 13:42:24,073 INFO L226 Difference]: Without dead ends: 33 [2022-02-16 13:42:24,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:42:24,074 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:24,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 6 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-16 13:42:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2022-02-16 13:42:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 38 transitions. [2022-02-16 13:42:24,078 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 38 transitions. Word has length 10 [2022-02-16 13:42:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:24,078 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 38 transitions. [2022-02-16 13:42:24,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 38 transitions. [2022-02-16 13:42:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:24,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:24,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:24,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-16 13:42:24,079 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:24,080 INFO L85 PathProgramCache]: Analyzing trace with hash -845334535, now seen corresponding path program 1 times [2022-02-16 13:42:24,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:24,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552827530] [2022-02-16 13:42:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:24,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:24,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:24,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552827530] [2022-02-16 13:42:24,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552827530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:42:24,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:42:24,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-16 13:42:24,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041681156] [2022-02-16 13:42:24,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:42:24,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:42:24,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:42:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:42:24,142 INFO L87 Difference]: Start difference. First operand 22 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:24,190 INFO L93 Difference]: Finished difference Result 31 states and 50 transitions. [2022-02-16 13:42:24,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:24,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:24,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:24,191 INFO L225 Difference]: With dead ends: 31 [2022-02-16 13:42:24,191 INFO L226 Difference]: Without dead ends: 29 [2022-02-16 13:42:24,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:42:24,193 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:24,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:24,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-16 13:42:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2022-02-16 13:42:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2022-02-16 13:42:24,196 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2022-02-16 13:42:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:24,196 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2022-02-16 13:42:24,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2022-02-16 13:42:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:24,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:24,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:24,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-16 13:42:24,197 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:24,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:24,197 INFO L85 PathProgramCache]: Analyzing trace with hash -906160713, now seen corresponding path program 1 times [2022-02-16 13:42:24,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:24,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372843627] [2022-02-16 13:42:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:24,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:24,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:24,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372843627] [2022-02-16 13:42:24,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372843627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:24,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176582362] [2022-02-16 13:42:24,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:24,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:24,246 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:24,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 13:42:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:24,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 13:42:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:24,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:24,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176582362] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:24,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:24,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-16 13:42:24,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337142513] [2022-02-16 13:42:24,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:24,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:42:24,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:24,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:42:24,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:42:24,472 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:24,530 INFO L93 Difference]: Finished difference Result 31 states and 52 transitions. [2022-02-16 13:42:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:24,531 INFO L225 Difference]: With dead ends: 31 [2022-02-16 13:42:24,531 INFO L226 Difference]: Without dead ends: 31 [2022-02-16 13:42:24,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:42:24,533 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:24,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:24,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-16 13:42:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-02-16 13:42:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 39 transitions. [2022-02-16 13:42:24,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 39 transitions. Word has length 11 [2022-02-16 13:42:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:24,539 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 39 transitions. [2022-02-16 13:42:24,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 39 transitions. [2022-02-16 13:42:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:24,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:24,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:24,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-16 13:42:24,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:24,758 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash -742242413, now seen corresponding path program 2 times [2022-02-16 13:42:24,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:24,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303819563] [2022-02-16 13:42:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:24,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:24,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:24,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303819563] [2022-02-16 13:42:24,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303819563] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:24,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604321243] [2022-02-16 13:42:24,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:42:24,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:24,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:24,821 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:24,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 13:42:24,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:24,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 13:42:24,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:24,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:24,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604321243] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:24,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:24,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-16 13:42:24,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66455148] [2022-02-16 13:42:24,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:24,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 13:42:24,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:24,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 13:42:24,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:42:24,990 INFO L87 Difference]: Start difference. First operand 22 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:25,038 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2022-02-16 13:42:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:25,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:25,039 INFO L225 Difference]: With dead ends: 42 [2022-02-16 13:42:25,039 INFO L226 Difference]: Without dead ends: 42 [2022-02-16 13:42:25,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:42:25,040 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:25,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 14 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-16 13:42:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2022-02-16 13:42:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 46 transitions. [2022-02-16 13:42:25,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 46 transitions. Word has length 11 [2022-02-16 13:42:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:25,044 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 46 transitions. [2022-02-16 13:42:25,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 46 transitions. [2022-02-16 13:42:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:25,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:25,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:25,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:25,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:25,263 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash 59373815, now seen corresponding path program 2 times [2022-02-16 13:42:25,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:25,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172355779] [2022-02-16 13:42:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:25,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:25,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:25,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172355779] [2022-02-16 13:42:25,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172355779] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:42:25,293 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:42:25,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-16 13:42:25,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591748899] [2022-02-16 13:42:25,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:42:25,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:42:25,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:25,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:42:25,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:42:25,294 INFO L87 Difference]: Start difference. First operand 24 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:25,331 INFO L93 Difference]: Finished difference Result 34 states and 58 transitions. [2022-02-16 13:42:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:25,332 INFO L225 Difference]: With dead ends: 34 [2022-02-16 13:42:25,332 INFO L226 Difference]: Without dead ends: 33 [2022-02-16 13:42:25,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:42:25,333 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:25,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-16 13:42:25,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-02-16 13:42:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 50 transitions. [2022-02-16 13:42:25,335 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 50 transitions. Word has length 11 [2022-02-16 13:42:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:25,335 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 50 transitions. [2022-02-16 13:42:25,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 50 transitions. [2022-02-16 13:42:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:25,335 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:25,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:25,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-16 13:42:25,336 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash 865278773, now seen corresponding path program 3 times [2022-02-16 13:42:25,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:25,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921285035] [2022-02-16 13:42:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:25,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:25,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:25,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921285035] [2022-02-16 13:42:25,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921285035] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:42:25,369 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:42:25,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-16 13:42:25,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235558515] [2022-02-16 13:42:25,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:42:25,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:42:25,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:25,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:42:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:42:25,370 INFO L87 Difference]: Start difference. First operand 26 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:25,413 INFO L93 Difference]: Finished difference Result 37 states and 64 transitions. [2022-02-16 13:42:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:25,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:25,415 INFO L225 Difference]: With dead ends: 37 [2022-02-16 13:42:25,415 INFO L226 Difference]: Without dead ends: 36 [2022-02-16 13:42:25,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:42:25,416 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:25,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 14 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-16 13:42:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-02-16 13:42:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 49 transitions. [2022-02-16 13:42:25,418 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 49 transitions. Word has length 11 [2022-02-16 13:42:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:25,418 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 49 transitions. [2022-02-16 13:42:25,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 49 transitions. [2022-02-16 13:42:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:25,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:25,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:25,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-16 13:42:25,419 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:25,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1777717521, now seen corresponding path program 3 times [2022-02-16 13:42:25,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:25,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304958715] [2022-02-16 13:42:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:25,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:25,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:25,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304958715] [2022-02-16 13:42:25,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304958715] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:42:25,448 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:42:25,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-16 13:42:25,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296589519] [2022-02-16 13:42:25,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:42:25,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:42:25,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:25,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:42:25,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:42:25,449 INFO L87 Difference]: Start difference. First operand 26 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:25,484 INFO L93 Difference]: Finished difference Result 29 states and 53 transitions. [2022-02-16 13:42:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:25,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:25,488 INFO L225 Difference]: With dead ends: 29 [2022-02-16 13:42:25,488 INFO L226 Difference]: Without dead ends: 29 [2022-02-16 13:42:25,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:42:25,489 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:25,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 6 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-16 13:42:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-02-16 13:42:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2022-02-16 13:42:25,490 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 11 [2022-02-16 13:42:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:25,491 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2022-02-16 13:42:25,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2022-02-16 13:42:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:25,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:25,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:25,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-16 13:42:25,491 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:25,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:25,492 INFO L85 PathProgramCache]: Analyzing trace with hash 617529755, now seen corresponding path program 4 times [2022-02-16 13:42:25,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:25,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266885920] [2022-02-16 13:42:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:25,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:25,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:25,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266885920] [2022-02-16 13:42:25,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266885920] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:25,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929819517] [2022-02-16 13:42:25,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:42:25,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:25,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:25,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:25,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 13:42:25,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:42:25,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 13:42:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:25,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:25,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929819517] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:25,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:25,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-16 13:42:25,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338711663] [2022-02-16 13:42:25,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:25,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:42:25,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:25,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:42:25,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:42:25,656 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:25,696 INFO L93 Difference]: Finished difference Result 35 states and 61 transitions. [2022-02-16 13:42:25,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:25,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:25,696 INFO L225 Difference]: With dead ends: 35 [2022-02-16 13:42:25,696 INFO L226 Difference]: Without dead ends: 35 [2022-02-16 13:42:25,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:42:25,697 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:25,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:25,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-16 13:42:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2022-02-16 13:42:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 43 transitions. [2022-02-16 13:42:25,699 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 43 transitions. Word has length 11 [2022-02-16 13:42:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:25,699 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 43 transitions. [2022-02-16 13:42:25,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 43 transitions. [2022-02-16 13:42:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:25,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:25,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:25,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:25,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:25,921 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2019920013, now seen corresponding path program 4 times [2022-02-16 13:42:25,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:25,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307723929] [2022-02-16 13:42:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:25,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:25,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:25,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307723929] [2022-02-16 13:42:25,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307723929] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:42:25,952 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:42:25,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-16 13:42:25,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702069273] [2022-02-16 13:42:25,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:42:25,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:42:25,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:25,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:42:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:42:25,954 INFO L87 Difference]: Start difference. First operand 23 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:25,991 INFO L93 Difference]: Finished difference Result 34 states and 57 transitions. [2022-02-16 13:42:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:25,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:25,992 INFO L225 Difference]: With dead ends: 34 [2022-02-16 13:42:25,992 INFO L226 Difference]: Without dead ends: 32 [2022-02-16 13:42:25,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:42:25,992 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:25,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-16 13:42:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-02-16 13:42:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 42 transitions. [2022-02-16 13:42:25,998 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 42 transitions. Word has length 11 [2022-02-16 13:42:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:25,998 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 42 transitions. [2022-02-16 13:42:25,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:25,998 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 42 transitions. [2022-02-16 13:42:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:25,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:25,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:25,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-16 13:42:25,999 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:25,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1491865081, now seen corresponding path program 5 times [2022-02-16 13:42:25,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:26,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146321278] [2022-02-16 13:42:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:26,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:26,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:26,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146321278] [2022-02-16 13:42:26,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146321278] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:26,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809049982] [2022-02-16 13:42:26,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:42:26,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:26,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:26,067 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:26,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 13:42:26,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:26,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:26,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 13:42:26,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:26,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:26,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809049982] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:26,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:26,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-16 13:42:26,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805208238] [2022-02-16 13:42:26,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:26,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 13:42:26,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:26,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 13:42:26,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:42:26,183 INFO L87 Difference]: Start difference. First operand 23 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:26,216 INFO L93 Difference]: Finished difference Result 36 states and 61 transitions. [2022-02-16 13:42:26,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:26,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:26,217 INFO L225 Difference]: With dead ends: 36 [2022-02-16 13:42:26,217 INFO L226 Difference]: Without dead ends: 36 [2022-02-16 13:42:26,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:42:26,218 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:26,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 10 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:26,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-16 13:42:26,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2022-02-16 13:42:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 42 transitions. [2022-02-16 13:42:26,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 42 transitions. Word has length 11 [2022-02-16 13:42:26,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:26,220 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 42 transitions. [2022-02-16 13:42:26,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 42 transitions. [2022-02-16 13:42:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:26,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:26,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:26,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:26,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:26,444 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2001485987, now seen corresponding path program 5 times [2022-02-16 13:42:26,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:26,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937812795] [2022-02-16 13:42:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:26,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:26,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:26,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937812795] [2022-02-16 13:42:26,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937812795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:42:26,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:42:26,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-16 13:42:26,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900207553] [2022-02-16 13:42:26,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:42:26,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:42:26,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:26,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:42:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:42:26,475 INFO L87 Difference]: Start difference. First operand 23 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:26,501 INFO L93 Difference]: Finished difference Result 33 states and 54 transitions. [2022-02-16 13:42:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:26,502 INFO L225 Difference]: With dead ends: 33 [2022-02-16 13:42:26,502 INFO L226 Difference]: Without dead ends: 32 [2022-02-16 13:42:26,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:42:26,503 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:26,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-16 13:42:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-02-16 13:42:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 46 transitions. [2022-02-16 13:42:26,504 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 46 transitions. Word has length 11 [2022-02-16 13:42:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:26,504 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 46 transitions. [2022-02-16 13:42:26,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 46 transitions. [2022-02-16 13:42:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:26,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:26,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:26,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-16 13:42:26,505 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:26,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1195581029, now seen corresponding path program 6 times [2022-02-16 13:42:26,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:26,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589219524] [2022-02-16 13:42:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:26,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:26,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:26,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589219524] [2022-02-16 13:42:26,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589219524] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:42:26,538 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:42:26,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-16 13:42:26,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95444156] [2022-02-16 13:42:26,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:42:26,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:42:26,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:26,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:42:26,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:42:26,539 INFO L87 Difference]: Start difference. First operand 25 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:26,562 INFO L93 Difference]: Finished difference Result 28 states and 50 transitions. [2022-02-16 13:42:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:26,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:26,563 INFO L225 Difference]: With dead ends: 28 [2022-02-16 13:42:26,563 INFO L226 Difference]: Without dead ends: 27 [2022-02-16 13:42:26,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:42:26,563 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:26,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-16 13:42:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-02-16 13:42:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 45 transitions. [2022-02-16 13:42:26,565 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 45 transitions. Word has length 11 [2022-02-16 13:42:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:26,565 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 45 transitions. [2022-02-16 13:42:26,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 45 transitions. [2022-02-16 13:42:26,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:42:26,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:26,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:26,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-16 13:42:26,566 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:26,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash -283142281, now seen corresponding path program 6 times [2022-02-16 13:42:26,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:26,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131104033] [2022-02-16 13:42:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:26,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:26,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:26,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131104033] [2022-02-16 13:42:26,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131104033] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:42:26,608 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:42:26,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-16 13:42:26,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349920448] [2022-02-16 13:42:26,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:42:26,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:42:26,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:26,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:42:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:42:26,609 INFO L87 Difference]: Start difference. First operand 25 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:26,655 INFO L93 Difference]: Finished difference Result 25 states and 44 transitions. [2022-02-16 13:42:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:42:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:42:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:26,656 INFO L225 Difference]: With dead ends: 25 [2022-02-16 13:42:26,656 INFO L226 Difference]: Without dead ends: 25 [2022-02-16 13:42:26,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:42:26,656 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:26,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:42:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-16 13:42:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-02-16 13:42:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 38 transitions. [2022-02-16 13:42:26,658 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 38 transitions. Word has length 11 [2022-02-16 13:42:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:26,658 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 38 transitions. [2022-02-16 13:42:26,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 38 transitions. [2022-02-16 13:42:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:42:26,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:26,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:26,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-16 13:42:26,661 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:26,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1940531813, now seen corresponding path program 1 times [2022-02-16 13:42:26,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:26,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738132184] [2022-02-16 13:42:26,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:26,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:26,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:26,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738132184] [2022-02-16 13:42:26,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738132184] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:26,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159585400] [2022-02-16 13:42:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:26,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:26,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:26,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:26,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 13:42:26,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 13:42:26,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:26,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2022-02-16 13:42:26,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:42:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:26,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:27,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:27,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 111 [2022-02-16 13:42:27,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:27,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 91 [2022-02-16 13:42:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:27,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159585400] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:27,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:27,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-02-16 13:42:27,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905510302] [2022-02-16 13:42:27,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:27,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:27,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:27,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:27,492 INFO L87 Difference]: Start difference. First operand 22 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:27,666 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2022-02-16 13:42:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:42:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:42:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:27,667 INFO L225 Difference]: With dead ends: 43 [2022-02-16 13:42:27,667 INFO L226 Difference]: Without dead ends: 40 [2022-02-16 13:42:27,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:42:27,670 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:27,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 8 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-16 13:42:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2022-02-16 13:42:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 50 transitions. [2022-02-16 13:42:27,675 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 50 transitions. Word has length 12 [2022-02-16 13:42:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:27,675 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 50 transitions. [2022-02-16 13:42:27,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 50 transitions. [2022-02-16 13:42:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:42:27,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:27,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:27,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:27,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-16 13:42:27,892 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1514371261, now seen corresponding path program 2 times [2022-02-16 13:42:27,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:27,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996985283] [2022-02-16 13:42:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:27,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:28,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:28,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996985283] [2022-02-16 13:42:28,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996985283] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:28,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758203845] [2022-02-16 13:42:28,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:42:28,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:28,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:28,058 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:28,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 13:42:28,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:28,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 13:42:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:28,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:28,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-02-16 13:42:28,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:28,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:42:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:28,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:28,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:28,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 120 [2022-02-16 13:42:28,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:28,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 92 [2022-02-16 13:42:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:28,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758203845] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:28,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:28,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-02-16 13:42:28,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174254831] [2022-02-16 13:42:28,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:28,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:28,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:28,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:28,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:28,615 INFO L87 Difference]: Start difference. First operand 27 states and 50 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:28,763 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2022-02-16 13:42:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:42:28,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:42:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:28,764 INFO L225 Difference]: With dead ends: 45 [2022-02-16 13:42:28,764 INFO L226 Difference]: Without dead ends: 42 [2022-02-16 13:42:28,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:42:28,765 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:28,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 17 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:28,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-16 13:42:28,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2022-02-16 13:42:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 66 transitions. [2022-02-16 13:42:28,767 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 66 transitions. Word has length 12 [2022-02-16 13:42:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:28,767 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 66 transitions. [2022-02-16 13:42:28,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 66 transitions. [2022-02-16 13:42:28,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:42:28,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:28,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:28,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:28,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-16 13:42:28,979 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1506640863, now seen corresponding path program 3 times [2022-02-16 13:42:28,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:28,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193920373] [2022-02-16 13:42:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:28,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:29,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:29,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193920373] [2022-02-16 13:42:29,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193920373] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:29,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008618005] [2022-02-16 13:42:29,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:42:29,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:29,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:29,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:29,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:42:29,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:29,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 13:42:29,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:29,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 13:42:29,318 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:42:29,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2022-02-16 13:42:29,324 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:42:29,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-16 13:42:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:29,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:29,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:29,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 121 [2022-02-16 13:42:29,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:29,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-02-16 13:42:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:29,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008618005] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:29,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:29,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-16 13:42:29,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249058114] [2022-02-16 13:42:29,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:29,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:29,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:29,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:29,707 INFO L87 Difference]: Start difference. First operand 33 states and 66 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:29,828 INFO L93 Difference]: Finished difference Result 41 states and 80 transitions. [2022-02-16 13:42:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 13:42:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:42:29,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:29,829 INFO L225 Difference]: With dead ends: 41 [2022-02-16 13:42:29,829 INFO L226 Difference]: Without dead ends: 38 [2022-02-16 13:42:29,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:29,830 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:29,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-02-16 13:42:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-16 13:42:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-02-16 13:42:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 69 transitions. [2022-02-16 13:42:29,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 69 transitions. Word has length 12 [2022-02-16 13:42:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:29,833 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 69 transitions. [2022-02-16 13:42:29,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 69 transitions. [2022-02-16 13:42:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:42:29,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:29,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:29,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-16 13:42:30,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:30,050 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:30,050 INFO L85 PathProgramCache]: Analyzing trace with hash 100880323, now seen corresponding path program 4 times [2022-02-16 13:42:30,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:30,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280570278] [2022-02-16 13:42:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:30,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:30,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:30,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280570278] [2022-02-16 13:42:30,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280570278] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:30,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057022941] [2022-02-16 13:42:30,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:42:30,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:30,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:30,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:30,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 13:42:30,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:42:30,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:30,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 13:42:30,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:30,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:30,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-02-16 13:42:30,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:30,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:42:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:30,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:30,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:30,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 126 [2022-02-16 13:42:30,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:30,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 98 [2022-02-16 13:42:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:30,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057022941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:30,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:30,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-02-16 13:42:30,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708626575] [2022-02-16 13:42:30,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:30,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:30,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:30,925 INFO L87 Difference]: Start difference. First operand 34 states and 69 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:31,022 INFO L93 Difference]: Finished difference Result 43 states and 81 transitions. [2022-02-16 13:42:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 13:42:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:42:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:31,022 INFO L225 Difference]: With dead ends: 43 [2022-02-16 13:42:31,022 INFO L226 Difference]: Without dead ends: 40 [2022-02-16 13:42:31,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:42:31,023 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:31,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-02-16 13:42:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-16 13:42:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-02-16 13:42:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 66 transitions. [2022-02-16 13:42:31,025 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 66 transitions. Word has length 12 [2022-02-16 13:42:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:31,025 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 66 transitions. [2022-02-16 13:42:31,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 66 transitions. [2022-02-16 13:42:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:42:31,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:31,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:31,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:31,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-16 13:42:31,226 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1983860283, now seen corresponding path program 5 times [2022-02-16 13:42:31,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:31,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197536527] [2022-02-16 13:42:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:31,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:31,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:31,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197536527] [2022-02-16 13:42:31,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197536527] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:31,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527129062] [2022-02-16 13:42:31,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:42:31,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:31,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:31,669 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:31,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 13:42:31,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:31,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:31,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 13:42:31,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:31,855 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:42:31,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2022-02-16 13:42:31,860 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:42:31,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-16 13:42:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:31,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:32,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:32,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 141 [2022-02-16 13:42:32,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:32,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 117 [2022-02-16 13:42:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:32,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527129062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:32,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:32,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2022-02-16 13:42:32,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396015207] [2022-02-16 13:42:32,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:32,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:42:32,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:32,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:42:32,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:32,403 INFO L87 Difference]: Start difference. First operand 33 states and 66 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:32,815 INFO L93 Difference]: Finished difference Result 56 states and 106 transitions. [2022-02-16 13:42:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:42:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:42:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:32,816 INFO L225 Difference]: With dead ends: 56 [2022-02-16 13:42:32,816 INFO L226 Difference]: Without dead ends: 53 [2022-02-16 13:42:32,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:42:32,817 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:32,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-02-16 13:42:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-16 13:42:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2022-02-16 13:42:32,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 73 transitions. [2022-02-16 13:42:32,819 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 73 transitions. Word has length 12 [2022-02-16 13:42:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:32,819 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 73 transitions. [2022-02-16 13:42:32,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 73 transitions. [2022-02-16 13:42:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:42:32,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:32,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:32,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:33,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:33,020 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:33,020 INFO L85 PathProgramCache]: Analyzing trace with hash -976515683, now seen corresponding path program 6 times [2022-02-16 13:42:33,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:33,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599546291] [2022-02-16 13:42:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:33,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:33,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:33,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599546291] [2022-02-16 13:42:33,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599546291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:33,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352655709] [2022-02-16 13:42:33,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:42:33,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:33,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:33,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:33,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 13:42:33,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:42:33,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:33,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 13:42:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:33,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:33,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-02-16 13:42:33,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:33,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:42:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:33,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:33,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:33,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 120 [2022-02-16 13:42:33,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:33,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 92 [2022-02-16 13:42:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:33,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352655709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:33,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:33,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-02-16 13:42:33,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541331565] [2022-02-16 13:42:33,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:33,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:33,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:33,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:33,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:33,783 INFO L87 Difference]: Start difference. First operand 36 states and 73 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:33,871 INFO L93 Difference]: Finished difference Result 45 states and 88 transitions. [2022-02-16 13:42:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:42:33,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:42:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:33,872 INFO L225 Difference]: With dead ends: 45 [2022-02-16 13:42:33,872 INFO L226 Difference]: Without dead ends: 42 [2022-02-16 13:42:33,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:42:33,872 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:33,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-02-16 13:42:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-16 13:42:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-02-16 13:42:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 73 transitions. [2022-02-16 13:42:33,874 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 73 transitions. Word has length 12 [2022-02-16 13:42:33,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:33,874 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 73 transitions. [2022-02-16 13:42:33,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 73 transitions. [2022-02-16 13:42:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:42:33,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:33,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:33,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:34,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:34,075 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:34,076 INFO L85 PathProgramCache]: Analyzing trace with hash -968785285, now seen corresponding path program 7 times [2022-02-16 13:42:34,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:34,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12165150] [2022-02-16 13:42:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:34,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:34,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:34,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12165150] [2022-02-16 13:42:34,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12165150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:34,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695631711] [2022-02-16 13:42:34,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:42:34,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:34,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:34,214 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:34,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 13:42:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:34,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 13:42:34,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:34,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:34,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-02-16 13:42:34,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:34,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:42:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:34,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:34,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:34,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 121 [2022-02-16 13:42:34,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:34,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-02-16 13:42:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:34,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695631711] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:34,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:34,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-16 13:42:34,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201312304] [2022-02-16 13:42:34,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:34,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:34,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:34,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:34,716 INFO L87 Difference]: Start difference. First operand 36 states and 73 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:34,900 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2022-02-16 13:42:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:42:34,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:42:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:34,901 INFO L225 Difference]: With dead ends: 59 [2022-02-16 13:42:34,901 INFO L226 Difference]: Without dead ends: 53 [2022-02-16 13:42:34,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:42:34,902 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:34,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 15 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-16 13:42:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2022-02-16 13:42:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 86 transitions. [2022-02-16 13:42:34,906 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 86 transitions. Word has length 12 [2022-02-16 13:42:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:34,906 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 86 transitions. [2022-02-16 13:42:34,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 86 transitions. [2022-02-16 13:42:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:34,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:34,907 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:34,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-16 13:42:35,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-16 13:42:35,123 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:35,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:35,123 INFO L85 PathProgramCache]: Analyzing trace with hash -6313097, now seen corresponding path program 8 times [2022-02-16 13:42:35,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:35,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851350527] [2022-02-16 13:42:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:35,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:35,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:35,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851350527] [2022-02-16 13:42:35,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851350527] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:35,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881421129] [2022-02-16 13:42:35,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:42:35,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:35,202 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:35,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 13:42:35,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:35,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:35,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:35,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:35,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:42:35,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:42:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:35,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:35,448 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:35,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:42:35,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:35,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881421129] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:35,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:35,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-16 13:42:35,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874574380] [2022-02-16 13:42:35,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:35,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:42:35,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:35,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:42:35,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:42:35,464 INFO L87 Difference]: Start difference. First operand 40 states and 86 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:35,650 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2022-02-16 13:42:35,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:42:35,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:35,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:35,651 INFO L225 Difference]: With dead ends: 57 [2022-02-16 13:42:35,651 INFO L226 Difference]: Without dead ends: 54 [2022-02-16 13:42:35,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:42:35,651 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:35,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-16 13:42:35,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2022-02-16 13:42:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 84 transitions. [2022-02-16 13:42:35,653 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 84 transitions. Word has length 13 [2022-02-16 13:42:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:35,653 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 84 transitions. [2022-02-16 13:42:35,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 84 transitions. [2022-02-16 13:42:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:35,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:35,653 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:35,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:35,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-16 13:42:35,858 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1891924615, now seen corresponding path program 9 times [2022-02-16 13:42:35,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:35,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487524215] [2022-02-16 13:42:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:35,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:35,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:35,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487524215] [2022-02-16 13:42:35,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487524215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:35,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852739880] [2022-02-16 13:42:35,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:42:35,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:35,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:35,922 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:35,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 13:42:35,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:42:35,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:35,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:35,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:36,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:42:36,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:42:36,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:42:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:36,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:36,145 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:36,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:42:36,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:42:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:36,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852739880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:36,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:36,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-16 13:42:36,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609999002] [2022-02-16 13:42:36,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:36,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:42:36,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:42:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:42:36,156 INFO L87 Difference]: Start difference. First operand 39 states and 84 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:36,295 INFO L93 Difference]: Finished difference Result 58 states and 121 transitions. [2022-02-16 13:42:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:42:36,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:36,296 INFO L225 Difference]: With dead ends: 58 [2022-02-16 13:42:36,296 INFO L226 Difference]: Without dead ends: 58 [2022-02-16 13:42:36,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:36,296 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:36,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 26 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-16 13:42:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2022-02-16 13:42:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 87 transitions. [2022-02-16 13:42:36,298 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 87 transitions. Word has length 13 [2022-02-16 13:42:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:36,298 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 87 transitions. [2022-02-16 13:42:36,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 87 transitions. [2022-02-16 13:42:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:36,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:36,299 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:36,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:36,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-16 13:42:36,507 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1853476621, now seen corresponding path program 10 times [2022-02-16 13:42:36,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:36,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43858667] [2022-02-16 13:42:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:36,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:36,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:36,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43858667] [2022-02-16 13:42:36,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43858667] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:36,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385586311] [2022-02-16 13:42:36,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:42:36,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:36,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:36,569 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:36,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 13:42:36,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:42:36,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:36,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:36,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:36,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:36,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:36,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:36,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:36,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:36,845 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:36,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:42:36,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:36,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385586311] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:36,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:36,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-16 13:42:36,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838404777] [2022-02-16 13:42:36,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:36,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:36,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:36,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:36,859 INFO L87 Difference]: Start difference. First operand 40 states and 87 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:37,141 INFO L93 Difference]: Finished difference Result 96 states and 176 transitions. [2022-02-16 13:42:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:42:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:37,148 INFO L225 Difference]: With dead ends: 96 [2022-02-16 13:42:37,148 INFO L226 Difference]: Without dead ends: 96 [2022-02-16 13:42:37,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:42:37,148 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 61 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:37,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 58 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-16 13:42:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 44. [2022-02-16 13:42:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.372093023255814) internal successors, (102), 43 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 102 transitions. [2022-02-16 13:42:37,151 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 102 transitions. Word has length 13 [2022-02-16 13:42:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:37,151 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 102 transitions. [2022-02-16 13:42:37,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 102 transitions. [2022-02-16 13:42:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:37,151 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:37,151 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:37,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:37,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:37,360 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:37,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:37,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1051860393, now seen corresponding path program 11 times [2022-02-16 13:42:37,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:37,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741864802] [2022-02-16 13:42:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:37,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:37,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:37,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741864802] [2022-02-16 13:42:37,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741864802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:37,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702329924] [2022-02-16 13:42:37,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:42:37,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:37,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:37,418 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:37,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 13:42:37,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:42:37,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:37,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:37,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:37,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:37,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:37,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:37,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:37,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:37,582 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:37,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:42:37,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:42:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:37,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702329924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:37,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:37,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-16 13:42:37,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751797992] [2022-02-16 13:42:37,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:37,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:37,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:37,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:37,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:37,589 INFO L87 Difference]: Start difference. First operand 44 states and 102 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:37,884 INFO L93 Difference]: Finished difference Result 93 states and 177 transitions. [2022-02-16 13:42:37,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:42:37,884 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:37,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:37,885 INFO L225 Difference]: With dead ends: 93 [2022-02-16 13:42:37,885 INFO L226 Difference]: Without dead ends: 90 [2022-02-16 13:42:37,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:42:37,886 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 109 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:37,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 26 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:37,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-16 13:42:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 48. [2022-02-16 13:42:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2022-02-16 13:42:37,905 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2022-02-16 13:42:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:37,905 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2022-02-16 13:42:37,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2022-02-16 13:42:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:37,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:37,905 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:37,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:38,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:38,113 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash 666483313, now seen corresponding path program 12 times [2022-02-16 13:42:38,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:38,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131403048] [2022-02-16 13:42:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:38,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:38,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:38,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131403048] [2022-02-16 13:42:38,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131403048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:38,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236831291] [2022-02-16 13:42:38,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:42:38,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:38,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:38,215 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:38,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 13:42:38,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:42:38,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:38,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:38,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:38,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:38,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:38,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:38,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:38,477 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:38,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:42:38,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:42:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:38,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236831291] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:38,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:38,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 13:42:38,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705221237] [2022-02-16 13:42:38,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:38,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:42:38,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:42:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:38,485 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:38,917 INFO L93 Difference]: Finished difference Result 91 states and 178 transitions. [2022-02-16 13:42:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:42:38,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:38,919 INFO L225 Difference]: With dead ends: 91 [2022-02-16 13:42:38,919 INFO L226 Difference]: Without dead ends: 91 [2022-02-16 13:42:38,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:42:38,919 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:38,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 50 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-16 13:42:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2022-02-16 13:42:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 106 transitions. [2022-02-16 13:42:38,921 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 106 transitions. Word has length 13 [2022-02-16 13:42:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:38,921 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 106 transitions. [2022-02-16 13:42:38,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 106 transitions. [2022-02-16 13:42:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:38,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:38,922 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:38,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:39,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-16 13:42:39,131 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:39,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:39,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1044129995, now seen corresponding path program 13 times [2022-02-16 13:42:39,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:39,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765233689] [2022-02-16 13:42:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:39,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:39,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:39,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765233689] [2022-02-16 13:42:39,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765233689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:39,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927590436] [2022-02-16 13:42:39,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:42:39,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:39,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:39,193 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:39,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 13:42:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:39,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:39,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:39,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:39,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:42:39,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:39,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:42:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:39,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:39,414 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:39,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:42:39,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:42:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:39,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927590436] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:39,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:39,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-16 13:42:39,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484244707] [2022-02-16 13:42:39,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:39,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:39,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:39,424 INFO L87 Difference]: Start difference. First operand 47 states and 106 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:39,576 INFO L93 Difference]: Finished difference Result 78 states and 169 transitions. [2022-02-16 13:42:39,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:42:39,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:39,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:39,577 INFO L225 Difference]: With dead ends: 78 [2022-02-16 13:42:39,577 INFO L226 Difference]: Without dead ends: 78 [2022-02-16 13:42:39,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:42:39,577 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:39,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 12 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-02-16 13:42:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-16 13:42:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2022-02-16 13:42:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 48 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 112 transitions. [2022-02-16 13:42:39,579 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 112 transitions. Word has length 13 [2022-02-16 13:42:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:39,580 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 112 transitions. [2022-02-16 13:42:39,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 112 transitions. [2022-02-16 13:42:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:39,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:39,580 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:39,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:39,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-16 13:42:39,787 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:39,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1239138935, now seen corresponding path program 14 times [2022-02-16 13:42:39,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:39,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250162406] [2022-02-16 13:42:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:39,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:39,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:39,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250162406] [2022-02-16 13:42:39,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250162406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:39,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512314092] [2022-02-16 13:42:39,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:42:39,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:39,853 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:39,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 13:42:39,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:39,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:39,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:39,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:39,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:42:39,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:39,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:42:39,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:39,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:42:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:39,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:40,064 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:40,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:42:40,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:42:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:40,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512314092] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:40,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:40,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:40,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841436951] [2022-02-16 13:42:40,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:40,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:40,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:40,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:40,076 INFO L87 Difference]: Start difference. First operand 49 states and 112 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:40,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:40,196 INFO L93 Difference]: Finished difference Result 77 states and 159 transitions. [2022-02-16 13:42:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:42:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:40,197 INFO L225 Difference]: With dead ends: 77 [2022-02-16 13:42:40,197 INFO L226 Difference]: Without dead ends: 77 [2022-02-16 13:42:40,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:40,197 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:40,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-16 13:42:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-02-16 13:42:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.4423076923076925) internal successors, (127), 52 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2022-02-16 13:42:40,199 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 13 [2022-02-16 13:42:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:40,199 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2022-02-16 13:42:40,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2022-02-16 13:42:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:40,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:40,199 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:40,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:40,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-16 13:42:40,400 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:40,400 INFO L85 PathProgramCache]: Analyzing trace with hash 319438227, now seen corresponding path program 15 times [2022-02-16 13:42:40,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:40,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178597132] [2022-02-16 13:42:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:40,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:40,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:40,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178597132] [2022-02-16 13:42:40,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178597132] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:40,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486346175] [2022-02-16 13:42:40,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:42:40,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:40,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:40,460 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:40,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 13:42:40,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:42:40,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:40,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:40,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:40,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:40,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:42:40,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:40,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:42:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:40,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:40,723 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:40,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:42:40,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:40,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486346175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:40,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:40,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:40,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95765554] [2022-02-16 13:42:40,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:40,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:40,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:40,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:40,740 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:40,909 INFO L93 Difference]: Finished difference Result 68 states and 143 transitions. [2022-02-16 13:42:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:42:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:40,910 INFO L225 Difference]: With dead ends: 68 [2022-02-16 13:42:40,910 INFO L226 Difference]: Without dead ends: 65 [2022-02-16 13:42:40,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:42:40,911 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:40,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-16 13:42:40,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2022-02-16 13:42:40,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 126 transitions. [2022-02-16 13:42:40,912 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 126 transitions. Word has length 13 [2022-02-16 13:42:40,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:40,912 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 126 transitions. [2022-02-16 13:42:40,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:40,912 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 126 transitions. [2022-02-16 13:42:40,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:40,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:40,913 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:40,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:41,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-16 13:42:41,123 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:41,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1246869333, now seen corresponding path program 16 times [2022-02-16 13:42:41,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:41,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521135588] [2022-02-16 13:42:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:41,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:41,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:41,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521135588] [2022-02-16 13:42:41,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521135588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:41,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895847774] [2022-02-16 13:42:41,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:42:41,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:41,189 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:41,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:42:41,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:41,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:41,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:41,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 13:42:41,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:41,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:41,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:41,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:41,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:41,475 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:41,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:42:41,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:42:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:41,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895847774] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:41,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:41,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:41,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820291827] [2022-02-16 13:42:41,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:41,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:41,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:41,490 INFO L87 Difference]: Start difference. First operand 53 states and 126 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:41,658 INFO L93 Difference]: Finished difference Result 88 states and 171 transitions. [2022-02-16 13:42:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:42:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:41,658 INFO L225 Difference]: With dead ends: 88 [2022-02-16 13:42:41,659 INFO L226 Difference]: Without dead ends: 87 [2022-02-16 13:42:41,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:42:41,659 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 49 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:41,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:41,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-16 13:42:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 54. [2022-02-16 13:42:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2022-02-16 13:42:41,661 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 13 [2022-02-16 13:42:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:41,661 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2022-02-16 13:42:41,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2022-02-16 13:42:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:41,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:41,662 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:41,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:41,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:41,862 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2048485561, now seen corresponding path program 17 times [2022-02-16 13:42:41,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:41,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400764079] [2022-02-16 13:42:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:41,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:41,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:41,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400764079] [2022-02-16 13:42:41,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400764079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:41,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032734146] [2022-02-16 13:42:41,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:42:41,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:41,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:41,926 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:41,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 13:42:41,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:41,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:41,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:41,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:42,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:42,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:42,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:42,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:42,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:42,169 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:42,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:42:42,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:42,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032734146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:42,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:42,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:42,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374073217] [2022-02-16 13:42:42,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:42,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:42,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:42,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:42,186 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:42,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:42,337 INFO L93 Difference]: Finished difference Result 73 states and 152 transitions. [2022-02-16 13:42:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:42:42,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:42,338 INFO L225 Difference]: With dead ends: 73 [2022-02-16 13:42:42,338 INFO L226 Difference]: Without dead ends: 70 [2022-02-16 13:42:42,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:42:42,338 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:42,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 12 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-16 13:42:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2022-02-16 13:42:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.3703703703703702) internal successors, (128), 54 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 128 transitions. [2022-02-16 13:42:42,340 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 128 transitions. Word has length 13 [2022-02-16 13:42:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:42,340 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 128 transitions. [2022-02-16 13:42:42,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 128 transitions. [2022-02-16 13:42:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:42,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:42,341 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:42,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-16 13:42:42,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:42,541 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:42,542 INFO L85 PathProgramCache]: Analyzing trace with hash -528138029, now seen corresponding path program 18 times [2022-02-16 13:42:42,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:42,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844069] [2022-02-16 13:42:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:42,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:42,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:42,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844069] [2022-02-16 13:42:42,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:42,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618620394] [2022-02-16 13:42:42,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:42:42,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:42,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:42,611 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:42,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 13:42:42,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:42:42,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:42,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:42,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:42,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:42,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:42,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:42,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:42,824 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:42,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:42:42,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:42,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618620394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:42,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:42,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:42,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294493839] [2022-02-16 13:42:42,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:42,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:42,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:42,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:42,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:42,846 INFO L87 Difference]: Start difference. First operand 55 states and 128 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:42,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:42,973 INFO L93 Difference]: Finished difference Result 66 states and 146 transitions. [2022-02-16 13:42:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:42:42,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:42,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:42,974 INFO L225 Difference]: With dead ends: 66 [2022-02-16 13:42:42,974 INFO L226 Difference]: Without dead ends: 66 [2022-02-16 13:42:42,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:42:42,974 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:42,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-16 13:42:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2022-02-16 13:42:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.339622641509434) internal successors, (124), 53 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 124 transitions. [2022-02-16 13:42:42,977 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 124 transitions. Word has length 13 [2022-02-16 13:42:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:42,978 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 124 transitions. [2022-02-16 13:42:42,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 124 transitions. [2022-02-16 13:42:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:42,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:42,978 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:42,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:43,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:43,179 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:43,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:43,179 INFO L85 PathProgramCache]: Analyzing trace with hash -242535663, now seen corresponding path program 19 times [2022-02-16 13:42:43,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:43,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850236355] [2022-02-16 13:42:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:43,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:43,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:43,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850236355] [2022-02-16 13:42:43,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850236355] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:43,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225441062] [2022-02-16 13:42:43,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:42:43,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:43,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:43,266 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:43,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 13:42:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:43,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:43,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:43,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:43,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:43,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:43,504 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:43,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:42:43,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:43,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225441062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:43,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:43,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:43,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62860279] [2022-02-16 13:42:43,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:43,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:43,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:43,525 INFO L87 Difference]: Start difference. First operand 54 states and 124 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:43,671 INFO L93 Difference]: Finished difference Result 94 states and 183 transitions. [2022-02-16 13:42:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:42:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:43,672 INFO L225 Difference]: With dead ends: 94 [2022-02-16 13:42:43,672 INFO L226 Difference]: Without dead ends: 94 [2022-02-16 13:42:43,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:43,673 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:43,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 40 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-16 13:42:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 57. [2022-02-16 13:42:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 56 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 136 transitions. [2022-02-16 13:42:43,674 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 136 transitions. Word has length 13 [2022-02-16 13:42:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:43,675 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 136 transitions. [2022-02-16 13:42:43,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 136 transitions. [2022-02-16 13:42:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:43,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:43,675 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:43,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-16 13:42:43,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:43,883 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash 559080565, now seen corresponding path program 20 times [2022-02-16 13:42:43,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:43,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156254628] [2022-02-16 13:42:43,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:43,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:43,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:43,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156254628] [2022-02-16 13:42:43,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156254628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:43,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855361901] [2022-02-16 13:42:43,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:42:43,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:43,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:43,969 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:44,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 13:42:44,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:44,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:44,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:44,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:44,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:44,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:44,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:44,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:44,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:44,198 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:44,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:42:44,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:42:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:44,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855361901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:44,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:44,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:44,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552431417] [2022-02-16 13:42:44,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:44,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:44,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:44,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:44,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:44,209 INFO L87 Difference]: Start difference. First operand 57 states and 136 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:44,453 INFO L93 Difference]: Finished difference Result 89 states and 178 transitions. [2022-02-16 13:42:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:42:44,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:44,454 INFO L225 Difference]: With dead ends: 89 [2022-02-16 13:42:44,454 INFO L226 Difference]: Without dead ends: 86 [2022-02-16 13:42:44,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:42:44,454 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 47 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:44,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 20 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-16 13:42:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2022-02-16 13:42:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.440677966101695) internal successors, (144), 59 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:44,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 144 transitions. [2022-02-16 13:42:44,457 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 144 transitions. Word has length 13 [2022-02-16 13:42:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:44,457 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 144 transitions. [2022-02-16 13:42:44,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 144 transitions. [2022-02-16 13:42:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:44,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:44,457 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:44,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:44,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:44,673 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:44,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2017543025, now seen corresponding path program 21 times [2022-02-16 13:42:44,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:44,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852803569] [2022-02-16 13:42:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:44,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:44,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:44,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852803569] [2022-02-16 13:42:44,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852803569] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:44,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920524214] [2022-02-16 13:42:44,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:42:44,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:44,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:44,719 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:44,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 13:42:44,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:42:44,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:44,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:44,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:44,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:44,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:44,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:44,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:44,892 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:44,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:42:44,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:42:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:44,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920524214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:44,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:44,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:44,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741658933] [2022-02-16 13:42:44,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:44,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:44,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:44,912 INFO L87 Difference]: Start difference. First operand 60 states and 144 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:45,102 INFO L93 Difference]: Finished difference Result 76 states and 164 transitions. [2022-02-16 13:42:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:42:45,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:45,103 INFO L225 Difference]: With dead ends: 76 [2022-02-16 13:42:45,103 INFO L226 Difference]: Without dead ends: 76 [2022-02-16 13:42:45,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:42:45,103 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:45,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-16 13:42:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2022-02-16 13:42:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3207547169811322) internal successors, (123), 53 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 123 transitions. [2022-02-16 13:42:45,105 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 123 transitions. Word has length 13 [2022-02-16 13:42:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:45,105 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 123 transitions. [2022-02-16 13:42:45,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 123 transitions. [2022-02-16 13:42:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:45,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:45,105 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:45,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:45,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-16 13:42:45,306 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:45,306 INFO L85 PathProgramCache]: Analyzing trace with hash 566810963, now seen corresponding path program 22 times [2022-02-16 13:42:45,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:45,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369234931] [2022-02-16 13:42:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:45,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:45,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:45,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369234931] [2022-02-16 13:42:45,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369234931] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:45,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033655629] [2022-02-16 13:42:45,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:42:45,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:45,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:45,360 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:45,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 13:42:45,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:42:45,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:45,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:45,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:45,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:45,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:42:45,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:45,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:42:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:45,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:45,571 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:45,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:42:45,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:42:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:45,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033655629] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:45,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:45,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:45,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374847297] [2022-02-16 13:42:45,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:45,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:45,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:45,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:45,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:45,587 INFO L87 Difference]: Start difference. First operand 54 states and 123 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:45,692 INFO L93 Difference]: Finished difference Result 74 states and 164 transitions. [2022-02-16 13:42:45,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:42:45,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:45,692 INFO L225 Difference]: With dead ends: 74 [2022-02-16 13:42:45,692 INFO L226 Difference]: Without dead ends: 74 [2022-02-16 13:42:45,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:45,693 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:45,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-02-16 13:42:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-16 13:42:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2022-02-16 13:42:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2022-02-16 13:42:45,694 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 13 [2022-02-16 13:42:45,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:45,695 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2022-02-16 13:42:45,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2022-02-16 13:42:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:45,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:45,695 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:45,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:45,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-16 13:42:45,896 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1546997875, now seen corresponding path program 23 times [2022-02-16 13:42:45,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:45,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915651989] [2022-02-16 13:42:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:45,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:45,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:45,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915651989] [2022-02-16 13:42:45,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915651989] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:45,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884792069] [2022-02-16 13:42:45,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:42:45,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:45,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:45,976 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:45,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 13:42:45,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:45,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:45,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:45,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:46,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:42:46,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:42:46,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:42:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:46,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:46,172 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:46,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:42:46,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:42:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:46,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884792069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:46,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:46,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-16 13:42:46,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173312089] [2022-02-16 13:42:46,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:46,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:42:46,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:46,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:42:46,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:42:46,182 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:46,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:46,317 INFO L93 Difference]: Finished difference Result 77 states and 166 transitions. [2022-02-16 13:42:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:42:46,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:46,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:46,317 INFO L225 Difference]: With dead ends: 77 [2022-02-16 13:42:46,317 INFO L226 Difference]: Without dead ends: 77 [2022-02-16 13:42:46,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:46,318 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 38 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:46,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 24 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-16 13:42:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2022-02-16 13:42:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 127 transitions. [2022-02-16 13:42:46,319 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 127 transitions. Word has length 13 [2022-02-16 13:42:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:46,320 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 127 transitions. [2022-02-16 13:42:46,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 127 transitions. [2022-02-16 13:42:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:46,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:46,320 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:46,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:46,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-16 13:42:46,521 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:46,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:46,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1390433691, now seen corresponding path program 24 times [2022-02-16 13:42:46,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:46,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633821082] [2022-02-16 13:42:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:46,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:46,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:46,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633821082] [2022-02-16 13:42:46,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633821082] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:46,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841137183] [2022-02-16 13:42:46,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:42:46,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:46,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:46,590 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:46,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 13:42:46,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:42:46,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:46,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:46,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:46,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:42:46,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:42:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:46,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:46,845 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:46,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:42:46,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:46,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841137183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:46,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:46,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-16 13:42:46,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488734412] [2022-02-16 13:42:46,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:46,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:42:46,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:46,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:42:46,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:42:46,857 INFO L87 Difference]: Start difference. First operand 55 states and 127 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:47,076 INFO L93 Difference]: Finished difference Result 75 states and 159 transitions. [2022-02-16 13:42:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:42:47,076 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:47,077 INFO L225 Difference]: With dead ends: 75 [2022-02-16 13:42:47,077 INFO L226 Difference]: Without dead ends: 72 [2022-02-16 13:42:47,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:42:47,077 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:47,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 26 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:47,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-16 13:42:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2022-02-16 13:42:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.3333333333333335) internal successors, (126), 54 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 126 transitions. [2022-02-16 13:42:47,079 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 126 transitions. Word has length 13 [2022-02-16 13:42:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:47,079 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 126 transitions. [2022-02-16 13:42:47,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 126 transitions. [2022-02-16 13:42:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:47,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:47,079 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:47,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:47,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:47,295 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:47,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:47,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1413378091, now seen corresponding path program 25 times [2022-02-16 13:42:47,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:47,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421225028] [2022-02-16 13:42:47,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:47,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:47,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:47,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421225028] [2022-02-16 13:42:47,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421225028] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:47,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941005689] [2022-02-16 13:42:47,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:42:47,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:47,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:47,357 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:47,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 13:42:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:47,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:47,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:47,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:42:47,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:47,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:42:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:47,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:47,593 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:47,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:42:47,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:42:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:47,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941005689] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:47,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:47,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-16 13:42:47,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654724403] [2022-02-16 13:42:47,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:47,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:47,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:47,602 INFO L87 Difference]: Start difference. First operand 55 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:47,760 INFO L93 Difference]: Finished difference Result 88 states and 188 transitions. [2022-02-16 13:42:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:42:47,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:47,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:47,761 INFO L225 Difference]: With dead ends: 88 [2022-02-16 13:42:47,761 INFO L226 Difference]: Without dead ends: 88 [2022-02-16 13:42:47,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:42:47,761 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:47,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 16 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-02-16 13:42:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-16 13:42:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2022-02-16 13:42:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 129 transitions. [2022-02-16 13:42:47,763 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 129 transitions. Word has length 13 [2022-02-16 13:42:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:47,763 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 129 transitions. [2022-02-16 13:42:47,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 129 transitions. [2022-02-16 13:42:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:47,763 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:47,763 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:47,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:47,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-16 13:42:47,964 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1961888497, now seen corresponding path program 26 times [2022-02-16 13:42:47,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:47,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024809913] [2022-02-16 13:42:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:47,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:48,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:48,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024809913] [2022-02-16 13:42:48,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024809913] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:48,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871664045] [2022-02-16 13:42:48,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:42:48,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:48,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:48,035 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:48,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 13:42:48,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:48,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:48,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:48,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:48,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:48,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:42:48,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:48,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:42:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:48,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:48,324 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:48,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:42:48,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:48,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871664045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:48,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:48,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-16 13:42:48,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472074912] [2022-02-16 13:42:48,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:48,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:48,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:48,341 INFO L87 Difference]: Start difference. First operand 56 states and 129 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:48,536 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2022-02-16 13:42:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:42:48,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:48,537 INFO L225 Difference]: With dead ends: 77 [2022-02-16 13:42:48,537 INFO L226 Difference]: Without dead ends: 75 [2022-02-16 13:42:48,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:42:48,538 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:48,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 32 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 192 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-02-16 13:42:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-16 13:42:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2022-02-16 13:42:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2022-02-16 13:42:48,540 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 13 [2022-02-16 13:42:48,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:48,540 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2022-02-16 13:42:48,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2022-02-16 13:42:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:48,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:48,540 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:48,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:48,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-16 13:42:48,756 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1405647693, now seen corresponding path program 27 times [2022-02-16 13:42:48,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:48,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887005305] [2022-02-16 13:42:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:48,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:48,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:48,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887005305] [2022-02-16 13:42:48,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887005305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:48,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250405646] [2022-02-16 13:42:48,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:42:48,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:48,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:48,838 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:48,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 13:42:48,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:42:48,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:48,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:48,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:48,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:48,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:48,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:49,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:49,080 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:49,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:42:49,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:42:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:49,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250405646] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:49,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:49,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-16 13:42:49,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014669639] [2022-02-16 13:42:49,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:49,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:49,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:49,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:49,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:49,089 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:49,462 INFO L93 Difference]: Finished difference Result 116 states and 222 transitions. [2022-02-16 13:42:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:42:49,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:49,462 INFO L225 Difference]: With dead ends: 116 [2022-02-16 13:42:49,462 INFO L226 Difference]: Without dead ends: 116 [2022-02-16 13:42:49,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:42:49,463 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 75 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:49,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 36 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-16 13:42:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 59. [2022-02-16 13:42:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.396551724137931) internal successors, (139), 58 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 139 transitions. [2022-02-16 13:42:49,488 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 139 transitions. Word has length 13 [2022-02-16 13:42:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:49,489 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 139 transitions. [2022-02-16 13:42:49,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 139 transitions. [2022-02-16 13:42:49,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:49,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:49,489 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:49,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-16 13:42:49,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:49,704 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash -604031465, now seen corresponding path program 28 times [2022-02-16 13:42:49,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:49,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288868108] [2022-02-16 13:42:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:49,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:49,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:49,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288868108] [2022-02-16 13:42:49,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288868108] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:49,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51242404] [2022-02-16 13:42:49,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:42:49,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:49,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:49,770 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:49,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 13:42:49,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:42:49,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:49,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:49,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:49,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:49,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:49,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:49,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:49,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:50,018 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:50,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:42:50,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:50,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51242404] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:50,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:50,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-16 13:42:50,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174759669] [2022-02-16 13:42:50,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:50,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:50,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:50,032 INFO L87 Difference]: Start difference. First operand 59 states and 139 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:50,444 INFO L93 Difference]: Finished difference Result 108 states and 212 transitions. [2022-02-16 13:42:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:42:50,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:50,445 INFO L225 Difference]: With dead ends: 108 [2022-02-16 13:42:50,445 INFO L226 Difference]: Without dead ends: 106 [2022-02-16 13:42:50,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:42:50,445 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 73 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:50,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 38 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-16 13:42:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 62. [2022-02-16 13:42:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2022-02-16 13:42:50,447 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 13 [2022-02-16 13:42:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:50,447 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2022-02-16 13:42:50,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2022-02-16 13:42:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:50,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:50,448 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:50,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-16 13:42:50,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:50,648 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:50,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1114312241, now seen corresponding path program 29 times [2022-02-16 13:42:50,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:50,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022072771] [2022-02-16 13:42:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:50,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:50,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:50,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022072771] [2022-02-16 13:42:50,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022072771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:50,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354589745] [2022-02-16 13:42:50,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:42:50,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:50,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:50,736 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:50,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 13:42:50,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:42:50,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:50,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:50,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:50,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:50,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:50,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:50,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:50,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:51,000 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:42:51,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:42:51,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:51,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354589745] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:51,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:51,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-16 13:42:51,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337636236] [2022-02-16 13:42:51,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:51,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:42:51,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:42:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:42:51,017 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:51,345 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2022-02-16 13:42:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:42:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:51,346 INFO L225 Difference]: With dead ends: 99 [2022-02-16 13:42:51,346 INFO L226 Difference]: Without dead ends: 99 [2022-02-16 13:42:51,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:42:51,359 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:51,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 68 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:42:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-16 13:42:51,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2022-02-16 13:42:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 59 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 140 transitions. [2022-02-16 13:42:51,361 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 140 transitions. Word has length 13 [2022-02-16 13:42:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:51,361 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 140 transitions. [2022-02-16 13:42:51,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 140 transitions. [2022-02-16 13:42:51,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:51,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:51,362 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:51,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:51,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-16 13:42:51,578 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:51,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash 732792669, now seen corresponding path program 30 times [2022-02-16 13:42:51,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:51,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041900965] [2022-02-16 13:42:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:51,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:51,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:51,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041900965] [2022-02-16 13:42:51,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041900965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:51,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487750673] [2022-02-16 13:42:51,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:42:51,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:51,636 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:51,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 13:42:51,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:42:51,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:51,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:51,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:51,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:51,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:42:51,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:51,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:42:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:51,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:51,877 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:51,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:42:51,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:42:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:51,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487750673] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:51,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:51,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:51,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005444776] [2022-02-16 13:42:51,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:51,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:51,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:51,890 INFO L87 Difference]: Start difference. First operand 60 states and 140 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:52,025 INFO L93 Difference]: Finished difference Result 92 states and 195 transitions. [2022-02-16 13:42:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:42:52,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:52,026 INFO L225 Difference]: With dead ends: 92 [2022-02-16 13:42:52,026 INFO L226 Difference]: Without dead ends: 92 [2022-02-16 13:42:52,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:52,026 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:52,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 40 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 219 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-02-16 13:42:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-16 13:42:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2022-02-16 13:42:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 152 transitions. [2022-02-16 13:42:52,028 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 152 transitions. Word has length 13 [2022-02-16 13:42:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:52,028 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 152 transitions. [2022-02-16 13:42:52,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 152 transitions. [2022-02-16 13:42:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:52,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:52,028 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:52,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:52,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:52,229 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:52,229 INFO L85 PathProgramCache]: Analyzing trace with hash -186908039, now seen corresponding path program 31 times [2022-02-16 13:42:52,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:52,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175381733] [2022-02-16 13:42:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:52,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:52,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:52,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175381733] [2022-02-16 13:42:52,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175381733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:52,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833835590] [2022-02-16 13:42:52,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:42:52,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:52,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:52,292 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:52,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 13:42:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:52,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:52,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:52,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:52,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:42:52,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:52,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:42:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:52,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:52,552 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:52,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:42:52,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:52,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833835590] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:52,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:52,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:52,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273938122] [2022-02-16 13:42:52,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:52,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:52,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:52,570 INFO L87 Difference]: Start difference. First operand 63 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:52,734 INFO L93 Difference]: Finished difference Result 80 states and 173 transitions. [2022-02-16 13:42:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:42:52,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:52,735 INFO L225 Difference]: With dead ends: 80 [2022-02-16 13:42:52,735 INFO L226 Difference]: Without dead ends: 78 [2022-02-16 13:42:52,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:42:52,735 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:52,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 18 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-02-16 13:42:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-16 13:42:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2022-02-16 13:42:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4285714285714284) internal successors, (153), 63 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:52,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 153 transitions. [2022-02-16 13:42:52,737 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 153 transitions. Word has length 13 [2022-02-16 13:42:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:52,737 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 153 transitions. [2022-02-16 13:42:52,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 153 transitions. [2022-02-16 13:42:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:52,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:52,737 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:52,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:52,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-16 13:42:52,938 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash 740523067, now seen corresponding path program 32 times [2022-02-16 13:42:52,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:52,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178231045] [2022-02-16 13:42:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:52,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:52,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:52,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178231045] [2022-02-16 13:42:52,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178231045] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:52,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937968634] [2022-02-16 13:42:52,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:42:52,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:52,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:52,999 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:53,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-16 13:42:53,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:53,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:53,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:53,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:53,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:53,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:53,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:53,219 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:53,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:42:53,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:42:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:53,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937968634] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:53,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:53,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:53,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289590389] [2022-02-16 13:42:53,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:53,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:53,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:53,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:53,235 INFO L87 Difference]: Start difference. First operand 64 states and 153 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:53,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:53,436 INFO L93 Difference]: Finished difference Result 106 states and 208 transitions. [2022-02-16 13:42:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:42:53,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:53,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:53,437 INFO L225 Difference]: With dead ends: 106 [2022-02-16 13:42:53,437 INFO L226 Difference]: Without dead ends: 106 [2022-02-16 13:42:53,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:42:53,437 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 50 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:53,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-16 13:42:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 63. [2022-02-16 13:42:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.370967741935484) internal successors, (147), 62 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 147 transitions. [2022-02-16 13:42:53,439 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 147 transitions. Word has length 13 [2022-02-16 13:42:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:53,439 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 147 transitions. [2022-02-16 13:42:53,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 147 transitions. [2022-02-16 13:42:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:53,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:53,440 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:53,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-16 13:42:53,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:53,651 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:53,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1542139295, now seen corresponding path program 33 times [2022-02-16 13:42:53,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:53,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882999954] [2022-02-16 13:42:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:53,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:53,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:53,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882999954] [2022-02-16 13:42:53,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882999954] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:53,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56602938] [2022-02-16 13:42:53,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:42:53,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:53,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:53,716 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:53,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-16 13:42:53,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:42:53,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:53,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:53,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:53,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:53,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:53,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:53,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:53,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:53,933 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:53,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:42:53,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:53,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56602938] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:53,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:53,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:53,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481880277] [2022-02-16 13:42:53,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:53,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:53,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:53,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:53,952 INFO L87 Difference]: Start difference. First operand 63 states and 147 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:54,139 INFO L93 Difference]: Finished difference Result 86 states and 178 transitions. [2022-02-16 13:42:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:42:54,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:54,140 INFO L225 Difference]: With dead ends: 86 [2022-02-16 13:42:54,140 INFO L226 Difference]: Without dead ends: 84 [2022-02-16 13:42:54,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:42:54,140 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:54,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 16 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-16 13:42:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2022-02-16 13:42:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.390625) internal successors, (153), 64 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:54,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 153 transitions. [2022-02-16 13:42:54,142 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 153 transitions. Word has length 13 [2022-02-16 13:42:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:54,142 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 153 transitions. [2022-02-16 13:42:54,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 153 transitions. [2022-02-16 13:42:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:54,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:54,143 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:54,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:54,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-16 13:42:54,343 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:54,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1034484295, now seen corresponding path program 34 times [2022-02-16 13:42:54,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:54,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482102519] [2022-02-16 13:42:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:54,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:54,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:54,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482102519] [2022-02-16 13:42:54,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482102519] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:54,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242210404] [2022-02-16 13:42:54,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:42:54,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:54,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:54,391 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:54,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-16 13:42:54,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:42:54,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:54,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:54,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:54,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:54,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:54,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:54,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:54,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:54,531 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:54,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:42:54,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:54,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242210404] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:54,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:54,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:54,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651480250] [2022-02-16 13:42:54,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:54,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:54,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:54,545 INFO L87 Difference]: Start difference. First operand 65 states and 153 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:54,638 INFO L93 Difference]: Finished difference Result 79 states and 172 transitions. [2022-02-16 13:42:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:42:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:54,639 INFO L225 Difference]: With dead ends: 79 [2022-02-16 13:42:54,639 INFO L226 Difference]: Without dead ends: 79 [2022-02-16 13:42:54,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:54,639 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:54,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-16 13:42:54,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2022-02-16 13:42:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.338709677419355) internal successors, (145), 62 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 145 transitions. [2022-02-16 13:42:54,649 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 145 transitions. Word has length 13 [2022-02-16 13:42:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:54,649 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 145 transitions. [2022-02-16 13:42:54,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 145 transitions. [2022-02-16 13:42:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:54,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:54,650 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:54,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-16 13:42:54,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-16 13:42:54,863 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash -748881929, now seen corresponding path program 35 times [2022-02-16 13:42:54,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:54,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787909624] [2022-02-16 13:42:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:54,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:54,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:54,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787909624] [2022-02-16 13:42:54,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787909624] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:54,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144817254] [2022-02-16 13:42:54,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:42:54,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:54,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:54,914 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:54,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-16 13:42:54,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:42:54,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:54,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:54,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:54,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:54,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:54,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:54,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:55,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:55,059 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:55,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:42:55,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:42:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:55,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144817254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:55,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:55,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:55,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020039109] [2022-02-16 13:42:55,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:55,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:55,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:55,075 INFO L87 Difference]: Start difference. First operand 63 states and 145 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:55,210 INFO L93 Difference]: Finished difference Result 96 states and 188 transitions. [2022-02-16 13:42:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:42:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:55,211 INFO L225 Difference]: With dead ends: 96 [2022-02-16 13:42:55,211 INFO L226 Difference]: Without dead ends: 96 [2022-02-16 13:42:55,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:42:55,211 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:55,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 32 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-16 13:42:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2022-02-16 13:42:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.338709677419355) internal successors, (145), 62 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 145 transitions. [2022-02-16 13:42:55,213 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 145 transitions. Word has length 13 [2022-02-16 13:42:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:55,213 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 145 transitions. [2022-02-16 13:42:55,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 145 transitions. [2022-02-16 13:42:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:55,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:55,213 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:55,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:55,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-16 13:42:55,414 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:55,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:55,414 INFO L85 PathProgramCache]: Analyzing trace with hash 52734299, now seen corresponding path program 36 times [2022-02-16 13:42:55,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:55,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705182785] [2022-02-16 13:42:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:55,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:55,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:55,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705182785] [2022-02-16 13:42:55,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705182785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:55,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716861019] [2022-02-16 13:42:55,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:42:55,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:55,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:55,471 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:55,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-16 13:42:55,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:42:55,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:55,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:55,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:55,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:55,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:55,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:55,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:55,707 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:55,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:42:55,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:42:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:55,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716861019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:55,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:55,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:55,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936891295] [2022-02-16 13:42:55,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:55,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:55,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:55,720 INFO L87 Difference]: Start difference. First operand 63 states and 145 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:55,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:55,987 INFO L93 Difference]: Finished difference Result 95 states and 183 transitions. [2022-02-16 13:42:55,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:42:55,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:55,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:55,988 INFO L225 Difference]: With dead ends: 95 [2022-02-16 13:42:55,988 INFO L226 Difference]: Without dead ends: 91 [2022-02-16 13:42:55,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:42:55,988 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:55,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 20 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-16 13:42:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2022-02-16 13:42:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3384615384615386) internal successors, (152), 65 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 152 transitions. [2022-02-16 13:42:55,990 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 152 transitions. Word has length 13 [2022-02-16 13:42:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:55,990 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 152 transitions. [2022-02-16 13:42:55,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 152 transitions. [2022-02-16 13:42:55,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:55,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:55,990 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:56,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:56,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-16 13:42:56,191 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1771078005, now seen corresponding path program 37 times [2022-02-16 13:42:56,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:56,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125539888] [2022-02-16 13:42:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:56,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:56,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:56,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125539888] [2022-02-16 13:42:56,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125539888] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:56,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568113430] [2022-02-16 13:42:56,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:42:56,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:56,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:56,269 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:56,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-16 13:42:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:56,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:56,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:56,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:56,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:42:56,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:56,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:42:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:56,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:56,447 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:56,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:42:56,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:42:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:56,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568113430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:56,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:56,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:56,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402607229] [2022-02-16 13:42:56,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:56,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:56,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:56,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:56,456 INFO L87 Difference]: Start difference. First operand 66 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:56,585 INFO L93 Difference]: Finished difference Result 81 states and 168 transitions. [2022-02-16 13:42:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:42:56,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:56,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:56,586 INFO L225 Difference]: With dead ends: 81 [2022-02-16 13:42:56,586 INFO L226 Difference]: Without dead ends: 81 [2022-02-16 13:42:56,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:42:56,586 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:56,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 14 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-16 13:42:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2022-02-16 13:42:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 61 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 138 transitions. [2022-02-16 13:42:56,588 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 138 transitions. Word has length 13 [2022-02-16 13:42:56,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:56,589 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 138 transitions. [2022-02-16 13:42:56,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 138 transitions. [2022-02-16 13:42:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:42:56,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:56,589 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:56,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:56,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:56,805 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:56,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:56,806 INFO L85 PathProgramCache]: Analyzing trace with hash 60464697, now seen corresponding path program 38 times [2022-02-16 13:42:56,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:56,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644611739] [2022-02-16 13:42:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:56,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:56,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:56,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644611739] [2022-02-16 13:42:56,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644611739] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:56,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113811004] [2022-02-16 13:42:56,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:42:56,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:56,862 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:56,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-16 13:42:56,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:42:56,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:56,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 13:42:56,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:56,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:56,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:42:56,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:56,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:42:56,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:56,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:42:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:56,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:57,073 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:42:57,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:42:57,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:42:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:57,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113811004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:57,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:57,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-16 13:42:57,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210547919] [2022-02-16 13:42:57,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:57,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:42:57,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:42:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:42:57,086 INFO L87 Difference]: Start difference. First operand 62 states and 138 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:57,197 INFO L93 Difference]: Finished difference Result 78 states and 168 transitions. [2022-02-16 13:42:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:42:57,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:42:57,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:57,198 INFO L225 Difference]: With dead ends: 78 [2022-02-16 13:42:57,198 INFO L226 Difference]: Without dead ends: 78 [2022-02-16 13:42:57,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:42:57,198 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:57,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:42:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-16 13:42:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2022-02-16 13:42:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 61 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 138 transitions. [2022-02-16 13:42:57,200 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 138 transitions. Word has length 13 [2022-02-16 13:42:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:57,200 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 138 transitions. [2022-02-16 13:42:57,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 138 transitions. [2022-02-16 13:42:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:42:57,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:57,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:57,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-16 13:42:57,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:57,401 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1446621923, now seen corresponding path program 39 times [2022-02-16 13:42:57,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:57,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831150881] [2022-02-16 13:42:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:57,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:57,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:57,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831150881] [2022-02-16 13:42:57,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831150881] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:57,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733796030] [2022-02-16 13:42:57,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:42:57,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:57,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:57,672 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:57,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-16 13:42:57,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:42:57,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:57,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:42:57,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:58,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:42:58,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:42:58,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:58,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:42:58,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:58,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:42:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:58,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:58,614 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:42:58,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-02-16 13:42:58,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:42:58,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:58,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-02-16 13:42:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:58,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733796030] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:58,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:58,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:42:58,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253810135] [2022-02-16 13:42:58,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:58,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:42:58,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:42:58,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:42:58,927 INFO L87 Difference]: Start difference. First operand 62 states and 138 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:59,241 INFO L93 Difference]: Finished difference Result 95 states and 198 transitions. [2022-02-16 13:42:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:42:59,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:42:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:59,242 INFO L225 Difference]: With dead ends: 95 [2022-02-16 13:42:59,242 INFO L226 Difference]: Without dead ends: 92 [2022-02-16 13:42:59,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:42:59,242 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:59,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 181 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-02-16 13:42:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-16 13:42:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2022-02-16 13:42:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.234375) internal successors, (143), 64 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 143 transitions. [2022-02-16 13:42:59,244 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 143 transitions. Word has length 14 [2022-02-16 13:42:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:59,244 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 143 transitions. [2022-02-16 13:42:59,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 143 transitions. [2022-02-16 13:42:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:42:59,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:59,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:59,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-16 13:42:59,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-16 13:42:59,445 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:59,445 INFO L85 PathProgramCache]: Analyzing trace with hash -400541601, now seen corresponding path program 40 times [2022-02-16 13:42:59,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:59,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416129655] [2022-02-16 13:42:59,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:59,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:59,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:59,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416129655] [2022-02-16 13:42:59,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416129655] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:59,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539695930] [2022-02-16 13:42:59,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:42:59,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:59,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:59,777 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:59,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-16 13:42:59,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:42:59,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:59,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:42:59,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:00,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:00,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:00,073 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:43:00,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-02-16 13:43:00,077 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:43:00,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:43:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:00,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:00,501 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:00,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 233 treesize of output 213 [2022-02-16 13:43:00,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:00,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:00,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 197 treesize of output 191 [2022-02-16 13:43:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:00,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539695930] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:00,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:00,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-16 13:43:00,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110403207] [2022-02-16 13:43:00,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:00,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:43:00,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:43:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:43:00,751 INFO L87 Difference]: Start difference. First operand 65 states and 143 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:01,119 INFO L93 Difference]: Finished difference Result 86 states and 189 transitions. [2022-02-16 13:43:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:43:01,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:01,120 INFO L225 Difference]: With dead ends: 86 [2022-02-16 13:43:01,120 INFO L226 Difference]: Without dead ends: 83 [2022-02-16 13:43:01,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:43:01,120 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:01,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 14 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 219 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-02-16 13:43:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-16 13:43:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2022-02-16 13:43:01,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.283582089552239) internal successors, (153), 67 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 153 transitions. [2022-02-16 13:43:01,134 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 153 transitions. Word has length 14 [2022-02-16 13:43:01,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:01,134 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 153 transitions. [2022-02-16 13:43:01,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 153 transitions. [2022-02-16 13:43:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:01,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:01,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:01,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:01,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:01,347 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:01,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:01,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1206979585, now seen corresponding path program 41 times [2022-02-16 13:43:01,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:01,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98535869] [2022-02-16 13:43:01,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:01,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:01,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:01,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98535869] [2022-02-16 13:43:01,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98535869] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:01,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81774004] [2022-02-16 13:43:01,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:43:01,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:01,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:01,564 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:01,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-16 13:43:01,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:43:01,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:01,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:01,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:01,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:01,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:01,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:01,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:02,514 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:02,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-02-16 13:43:02,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:02,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:02,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-02-16 13:43:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:02,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81774004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:02,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:02,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:02,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033876762] [2022-02-16 13:43:02,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:02,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:02,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:02,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:02,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:02,789 INFO L87 Difference]: Start difference. First operand 68 states and 153 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:03,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:03,082 INFO L93 Difference]: Finished difference Result 87 states and 189 transitions. [2022-02-16 13:43:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:43:03,083 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:03,083 INFO L225 Difference]: With dead ends: 87 [2022-02-16 13:43:03,083 INFO L226 Difference]: Without dead ends: 84 [2022-02-16 13:43:03,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:43:03,087 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:03,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 235 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-02-16 13:43:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-16 13:43:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2022-02-16 13:43:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.283582089552239) internal successors, (153), 67 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 153 transitions. [2022-02-16 13:43:03,089 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 153 transitions. Word has length 14 [2022-02-16 13:43:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:03,089 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 153 transitions. [2022-02-16 13:43:03,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 153 transitions. [2022-02-16 13:43:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:03,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:03,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:03,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-16 13:43:03,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-16 13:43:03,290 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1358940377, now seen corresponding path program 42 times [2022-02-16 13:43:03,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:03,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378082995] [2022-02-16 13:43:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:03,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:03,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:03,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378082995] [2022-02-16 13:43:03,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378082995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:03,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62850314] [2022-02-16 13:43:03,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:43:03,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:03,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:03,566 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:03,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-16 13:43:03,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:43:03,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:03,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:03,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:03,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:03,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:03,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:03,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:03,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:03,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:04,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:04,458 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:04,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-02-16 13:43:04,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:04,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:04,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-02-16 13:43:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:04,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62850314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:04,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:04,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:04,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500868082] [2022-02-16 13:43:04,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:04,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:04,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:04,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:04,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:04,722 INFO L87 Difference]: Start difference. First operand 68 states and 153 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:05,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:05,149 INFO L93 Difference]: Finished difference Result 88 states and 190 transitions. [2022-02-16 13:43:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:43:05,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:05,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:05,149 INFO L225 Difference]: With dead ends: 88 [2022-02-16 13:43:05,149 INFO L226 Difference]: Without dead ends: 85 [2022-02-16 13:43:05,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:43:05,150 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:05,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-02-16 13:43:05,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-16 13:43:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2022-02-16 13:43:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.283582089552239) internal successors, (153), 67 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 153 transitions. [2022-02-16 13:43:05,151 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 153 transitions. Word has length 14 [2022-02-16 13:43:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:05,151 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 153 transitions. [2022-02-16 13:43:05,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 153 transitions. [2022-02-16 13:43:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:05,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:05,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:05,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-16 13:43:05,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:05,363 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:05,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:05,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1602893341, now seen corresponding path program 43 times [2022-02-16 13:43:05,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:05,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965317910] [2022-02-16 13:43:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:05,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:05,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:05,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965317910] [2022-02-16 13:43:05,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965317910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:05,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437501033] [2022-02-16 13:43:05,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:43:05,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:05,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:05,533 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:05,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-16 13:43:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:05,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:05,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:05,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:05,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2022-02-16 13:43:05,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:05,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:43:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:05,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:06,584 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:06,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 215 treesize of output 191 [2022-02-16 13:43:06,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:06,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:06,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 165 [2022-02-16 13:43:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:06,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437501033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:06,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:06,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:06,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486848512] [2022-02-16 13:43:06,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:06,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:06,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:06,939 INFO L87 Difference]: Start difference. First operand 68 states and 153 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:07,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:07,495 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2022-02-16 13:43:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:43:07,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:07,496 INFO L225 Difference]: With dead ends: 102 [2022-02-16 13:43:07,496 INFO L226 Difference]: Without dead ends: 99 [2022-02-16 13:43:07,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:43:07,496 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 49 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:07,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 21 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:43:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-16 13:43:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2022-02-16 13:43:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.3088235294117645) internal successors, (157), 68 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 157 transitions. [2022-02-16 13:43:07,498 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 157 transitions. Word has length 14 [2022-02-16 13:43:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:07,498 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 157 transitions. [2022-02-16 13:43:07,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 157 transitions. [2022-02-16 13:43:07,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:07,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:07,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:07,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-16 13:43:07,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:07,699 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:07,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:07,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1595162943, now seen corresponding path program 44 times [2022-02-16 13:43:07,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:07,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35392216] [2022-02-16 13:43:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:07,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:07,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:07,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35392216] [2022-02-16 13:43:07,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35392216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:07,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820770976] [2022-02-16 13:43:07,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:43:07,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:07,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:07,980 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:07,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-16 13:43:08,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:43:08,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:08,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:08,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:08,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:08,360 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:43:08,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-02-16 13:43:08,366 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:43:08,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:43:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:08,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:09,107 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:09,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-02-16 13:43:09,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:09,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:09,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-02-16 13:43:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:09,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820770976] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:09,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:09,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-16 13:43:09,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264705128] [2022-02-16 13:43:09,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:09,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:43:09,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:09,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:43:09,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:43:09,371 INFO L87 Difference]: Start difference. First operand 69 states and 157 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:10,265 INFO L93 Difference]: Finished difference Result 98 states and 209 transitions. [2022-02-16 13:43:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:43:10,266 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:10,266 INFO L225 Difference]: With dead ends: 98 [2022-02-16 13:43:10,266 INFO L226 Difference]: Without dead ends: 88 [2022-02-16 13:43:10,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:43:10,267 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:10,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 18 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 401 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-02-16 13:43:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-16 13:43:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2022-02-16 13:43:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.361111111111111) internal successors, (170), 72 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 170 transitions. [2022-02-16 13:43:10,268 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 170 transitions. Word has length 14 [2022-02-16 13:43:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:10,268 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 170 transitions. [2022-02-16 13:43:10,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:10,268 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 170 transitions. [2022-02-16 13:43:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:10,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:10,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:10,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-16 13:43:10,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-02-16 13:43:10,479 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1210399357, now seen corresponding path program 45 times [2022-02-16 13:43:10,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:10,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101999687] [2022-02-16 13:43:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:10,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:10,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:10,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101999687] [2022-02-16 13:43:10,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101999687] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:10,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130337116] [2022-02-16 13:43:10,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:43:10,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:10,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:10,900 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:10,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-16 13:43:10,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:43:10,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:10,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 13:43:10,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:11,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:11,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:11,251 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:43:11,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 95 [2022-02-16 13:43:11,258 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:43:11,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-02-16 13:43:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:11,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:12,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:12,173 INFO L353 Elim1Store]: treesize reduction 19, result has 53.7 percent of original size [2022-02-16 13:43:12,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 195 [2022-02-16 13:43:12,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:12,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 148 [2022-02-16 13:43:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:12,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130337116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:12,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:12,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-02-16 13:43:12,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179510611] [2022-02-16 13:43:12,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:12,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:43:12,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:43:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:43:12,464 INFO L87 Difference]: Start difference. First operand 73 states and 170 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:14,208 INFO L93 Difference]: Finished difference Result 142 states and 285 transitions. [2022-02-16 13:43:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:43:14,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:14,211 INFO L225 Difference]: With dead ends: 142 [2022-02-16 13:43:14,211 INFO L226 Difference]: Without dead ends: 130 [2022-02-16 13:43:14,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:43:14,212 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:14,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 28 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 449 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-02-16 13:43:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-16 13:43:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 80. [2022-02-16 13:43:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.392405063291139) internal successors, (189), 79 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 189 transitions. [2022-02-16 13:43:14,231 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 189 transitions. Word has length 14 [2022-02-16 13:43:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:14,231 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 189 transitions. [2022-02-16 13:43:14,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 189 transitions. [2022-02-16 13:43:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:14,231 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:14,232 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:14,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:14,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-16 13:43:14,432 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash -667700127, now seen corresponding path program 46 times [2022-02-16 13:43:14,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:14,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923854782] [2022-02-16 13:43:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:14,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:14,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:14,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923854782] [2022-02-16 13:43:14,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923854782] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:14,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996948616] [2022-02-16 13:43:14,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:43:14,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:14,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:14,477 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:14,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-16 13:43:14,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:43:14,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:14,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 13:43:14,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:14,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:14,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:43:14,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:14,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:43:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:14,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:14,691 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:43:14,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 23 [2022-02-16 13:43:14,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-02-16 13:43:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:14,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996948616] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:14,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:14,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-16 13:43:14,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254704134] [2022-02-16 13:43:14,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:14,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:43:14,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:14,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:43:14,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:43:14,697 INFO L87 Difference]: Start difference. First operand 80 states and 189 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:14,911 INFO L93 Difference]: Finished difference Result 112 states and 245 transitions. [2022-02-16 13:43:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:43:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:14,912 INFO L225 Difference]: With dead ends: 112 [2022-02-16 13:43:14,912 INFO L226 Difference]: Without dead ends: 112 [2022-02-16 13:43:14,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:43:14,913 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:14,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 16 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 234 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-02-16 13:43:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-16 13:43:14,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2022-02-16 13:43:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.3766233766233764) internal successors, (183), 77 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 183 transitions. [2022-02-16 13:43:14,914 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 183 transitions. Word has length 14 [2022-02-16 13:43:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:14,914 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 183 transitions. [2022-02-16 13:43:14,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 183 transitions. [2022-02-16 13:43:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:14,915 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:14,915 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:14,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-16 13:43:15,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-16 13:43:15,115 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash -221091617, now seen corresponding path program 47 times [2022-02-16 13:43:15,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:15,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919197075] [2022-02-16 13:43:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:15,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:15,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:15,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919197075] [2022-02-16 13:43:15,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919197075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:15,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624496312] [2022-02-16 13:43:15,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:43:15,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:15,331 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:15,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-16 13:43:15,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:43:15,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:15,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:15,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:15,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:15,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:15,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2022-02-16 13:43:15,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:15,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:43:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:15,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:16,038 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-16 13:43:16,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 207 [2022-02-16 13:43:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:16,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:16,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 175 [2022-02-16 13:43:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:16,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624496312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:16,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:16,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:16,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33078159] [2022-02-16 13:43:16,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:16,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:16,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:16,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:16,364 INFO L87 Difference]: Start difference. First operand 78 states and 183 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:16,920 INFO L93 Difference]: Finished difference Result 134 states and 272 transitions. [2022-02-16 13:43:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:43:16,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:16,920 INFO L225 Difference]: With dead ends: 134 [2022-02-16 13:43:16,920 INFO L226 Difference]: Without dead ends: 125 [2022-02-16 13:43:16,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:43:16,921 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:16,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 38 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:43:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-16 13:43:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 87. [2022-02-16 13:43:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.4069767441860463) internal successors, (207), 86 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 207 transitions. [2022-02-16 13:43:16,923 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 207 transitions. Word has length 14 [2022-02-16 13:43:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:16,923 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 207 transitions. [2022-02-16 13:43:16,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 207 transitions. [2022-02-16 13:43:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:16,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:16,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:16,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-16 13:43:17,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:17,140 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash 26281119, now seen corresponding path program 48 times [2022-02-16 13:43:17,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:17,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185904602] [2022-02-16 13:43:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:17,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:17,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:17,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185904602] [2022-02-16 13:43:17,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185904602] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:17,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878983590] [2022-02-16 13:43:17,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:43:17,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:17,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:17,352 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:17,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-16 13:43:17,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:43:17,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:17,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:17,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:17,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:17,705 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:43:17,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-02-16 13:43:17,711 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:43:17,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:43:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:17,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:18,184 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-16 13:43:18,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 244 treesize of output 208 [2022-02-16 13:43:18,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:18,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:18,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:18,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 176 [2022-02-16 13:43:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:18,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878983590] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:18,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:18,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:18,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337381035] [2022-02-16 13:43:18,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:18,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:18,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:18,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:18,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:18,493 INFO L87 Difference]: Start difference. First operand 87 states and 207 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:18,932 INFO L93 Difference]: Finished difference Result 126 states and 274 transitions. [2022-02-16 13:43:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:43:18,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:18,933 INFO L225 Difference]: With dead ends: 126 [2022-02-16 13:43:18,933 INFO L226 Difference]: Without dead ends: 120 [2022-02-16 13:43:18,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:43:18,934 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:18,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 47 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 427 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-02-16 13:43:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-16 13:43:18,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2022-02-16 13:43:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.4725274725274726) internal successors, (225), 91 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 225 transitions. [2022-02-16 13:43:18,937 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 225 transitions. Word has length 14 [2022-02-16 13:43:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:18,937 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 225 transitions. [2022-02-16 13:43:18,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:18,937 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 225 transitions. [2022-02-16 13:43:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:18,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:18,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:18,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:19,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-16 13:43:19,154 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1633802305, now seen corresponding path program 49 times [2022-02-16 13:43:19,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:19,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865443979] [2022-02-16 13:43:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:19,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:19,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:19,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865443979] [2022-02-16 13:43:19,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865443979] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:19,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750410593] [2022-02-16 13:43:19,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:43:19,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:19,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:19,384 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:19,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-16 13:43:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:19,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:19,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:19,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:19,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:19,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:19,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:19,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:19,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:19,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:20,245 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-16 13:43:20,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 244 treesize of output 208 [2022-02-16 13:43:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:20,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:20,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 176 [2022-02-16 13:43:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:20,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750410593] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:20,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:20,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:20,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325584172] [2022-02-16 13:43:20,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:20,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:20,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:20,580 INFO L87 Difference]: Start difference. First operand 92 states and 225 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:20,875 INFO L93 Difference]: Finished difference Result 139 states and 306 transitions. [2022-02-16 13:43:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:43:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:20,876 INFO L225 Difference]: With dead ends: 139 [2022-02-16 13:43:20,876 INFO L226 Difference]: Without dead ends: 133 [2022-02-16 13:43:20,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:43:20,876 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:20,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 20 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 236 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-02-16 13:43:20,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-16 13:43:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 93. [2022-02-16 13:43:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.489130434782609) internal successors, (229), 92 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 229 transitions. [2022-02-16 13:43:20,879 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 229 transitions. Word has length 14 [2022-02-16 13:43:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:20,879 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 229 transitions. [2022-02-16 13:43:20,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 229 transitions. [2022-02-16 13:43:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:20,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:20,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:20,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:21,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:21,091 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1091636101, now seen corresponding path program 50 times [2022-02-16 13:43:21,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:21,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537653641] [2022-02-16 13:43:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:21,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:21,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:21,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537653641] [2022-02-16 13:43:21,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537653641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:21,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027281918] [2022-02-16 13:43:21,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:43:21,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:21,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:21,298 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:21,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-16 13:43:21,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:43:21,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:21,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:21,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:21,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:21,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2022-02-16 13:43:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:21,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:43:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:21,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:21,943 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-16 13:43:21,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 207 [2022-02-16 13:43:21,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:21,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:21,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:21,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 175 [2022-02-16 13:43:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:22,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027281918] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:22,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:22,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:22,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377035752] [2022-02-16 13:43:22,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:22,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:22,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:22,177 INFO L87 Difference]: Start difference. First operand 93 states and 229 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:22,708 INFO L93 Difference]: Finished difference Result 161 states and 334 transitions. [2022-02-16 13:43:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:43:22,708 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:22,709 INFO L225 Difference]: With dead ends: 161 [2022-02-16 13:43:22,709 INFO L226 Difference]: Without dead ends: 149 [2022-02-16 13:43:22,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:43:22,709 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:22,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:43:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-16 13:43:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2022-02-16 13:43:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.5714285714285716) internal successors, (252), 98 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 252 transitions. [2022-02-16 13:43:22,713 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 252 transitions. Word has length 14 [2022-02-16 13:43:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:22,713 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 252 transitions. [2022-02-16 13:43:22,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 252 transitions. [2022-02-16 13:43:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:22,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:22,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:22,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:22,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:22,929 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:22,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:22,930 INFO L85 PathProgramCache]: Analyzing trace with hash -390038497, now seen corresponding path program 51 times [2022-02-16 13:43:22,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:22,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112023594] [2022-02-16 13:43:22,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:22,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:23,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:23,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112023594] [2022-02-16 13:43:23,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112023594] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:23,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006862459] [2022-02-16 13:43:23,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:43:23,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:23,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:23,114 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:23,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-16 13:43:23,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:43:23,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:23,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:23,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:23,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:23,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:23,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:23,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:23,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:23,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:23,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:23,722 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-16 13:43:23,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 244 treesize of output 208 [2022-02-16 13:43:23,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:23,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:23,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:23,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 176 [2022-02-16 13:43:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:24,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006862459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:24,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:24,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-16 13:43:24,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634917514] [2022-02-16 13:43:24,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:24,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:43:24,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:43:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:43:24,065 INFO L87 Difference]: Start difference. First operand 99 states and 252 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:24,364 INFO L93 Difference]: Finished difference Result 171 states and 375 transitions. [2022-02-16 13:43:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:43:24,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:24,365 INFO L225 Difference]: With dead ends: 171 [2022-02-16 13:43:24,365 INFO L226 Difference]: Without dead ends: 162 [2022-02-16 13:43:24,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:43:24,366 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 50 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:24,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 312 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-02-16 13:43:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-16 13:43:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2022-02-16 13:43:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.6636363636363636) internal successors, (293), 110 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 293 transitions. [2022-02-16 13:43:24,368 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 293 transitions. Word has length 14 [2022-02-16 13:43:24,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:24,368 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 293 transitions. [2022-02-16 13:43:24,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 293 transitions. [2022-02-16 13:43:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:24,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:24,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:24,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-02-16 13:43:24,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:24,576 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 732600931, now seen corresponding path program 52 times [2022-02-16 13:43:24,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:24,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796485977] [2022-02-16 13:43:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:24,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:24,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:24,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796485977] [2022-02-16 13:43:24,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796485977] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:24,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779095301] [2022-02-16 13:43:24,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:43:24,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:24,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:24,887 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:24,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-16 13:43:24,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:43:24,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:24,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:24,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:25,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:25,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:25,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:25,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:25,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:25,797 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:25,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 187 [2022-02-16 13:43:25,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:25,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:25,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 165 [2022-02-16 13:43:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:26,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779095301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:26,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:26,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:26,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200680840] [2022-02-16 13:43:26,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:26,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:26,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:26,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:26,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:26,028 INFO L87 Difference]: Start difference. First operand 111 states and 293 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:26,438 INFO L93 Difference]: Finished difference Result 148 states and 366 transitions. [2022-02-16 13:43:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:43:26,439 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:26,439 INFO L225 Difference]: With dead ends: 148 [2022-02-16 13:43:26,439 INFO L226 Difference]: Without dead ends: 145 [2022-02-16 13:43:26,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:43:26,441 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:26,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 278 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-02-16 13:43:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-16 13:43:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2022-02-16 13:43:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.6517857142857144) internal successors, (297), 112 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 297 transitions. [2022-02-16 13:43:26,443 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 297 transitions. Word has length 14 [2022-02-16 13:43:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:26,443 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 297 transitions. [2022-02-16 13:43:26,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 297 transitions. [2022-02-16 13:43:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:26,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:26,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:26,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:26,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:26,644 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:26,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1304055737, now seen corresponding path program 53 times [2022-02-16 13:43:26,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:26,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668555302] [2022-02-16 13:43:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:26,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:26,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:26,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668555302] [2022-02-16 13:43:26,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668555302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:26,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731819486] [2022-02-16 13:43:26,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:43:26,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:26,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:26,874 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:26,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-16 13:43:26,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:43:26,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:26,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:26,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:27,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:27,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:27,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:27,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:27,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:27,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:27,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:27,631 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:27,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 187 [2022-02-16 13:43:27,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:27,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:27,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 165 [2022-02-16 13:43:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:27,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731819486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:27,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:27,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-16 13:43:27,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593744967] [2022-02-16 13:43:27,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:27,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:43:27,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:27,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:43:27,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:43:27,849 INFO L87 Difference]: Start difference. First operand 113 states and 297 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:28,089 INFO L93 Difference]: Finished difference Result 142 states and 359 transitions. [2022-02-16 13:43:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:43:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:28,090 INFO L225 Difference]: With dead ends: 142 [2022-02-16 13:43:28,090 INFO L226 Difference]: Without dead ends: 139 [2022-02-16 13:43:28,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:43:28,090 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:28,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-02-16 13:43:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-16 13:43:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 114. [2022-02-16 13:43:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.6548672566371683) internal successors, (300), 113 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 300 transitions. [2022-02-16 13:43:28,093 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 300 transitions. Word has length 14 [2022-02-16 13:43:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:28,093 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 300 transitions. [2022-02-16 13:43:28,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 300 transitions. [2022-02-16 13:43:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:28,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:28,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:28,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-16 13:43:28,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-16 13:43:28,303 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1261864225, now seen corresponding path program 54 times [2022-02-16 13:43:28,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:28,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143281256] [2022-02-16 13:43:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:28,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:28,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:28,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143281256] [2022-02-16 13:43:28,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143281256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:28,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845074141] [2022-02-16 13:43:28,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:43:28,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:28,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:28,574 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:28,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-16 13:43:28,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:43:28,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:28,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:28,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:28,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:28,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:28,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:28,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:28,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:28,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:29,276 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:29,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 187 [2022-02-16 13:43:29,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:29,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:29,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 165 [2022-02-16 13:43:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:29,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845074141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:29,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:29,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:29,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415407912] [2022-02-16 13:43:29,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:29,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:29,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:29,454 INFO L87 Difference]: Start difference. First operand 114 states and 300 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:29,656 INFO L93 Difference]: Finished difference Result 141 states and 358 transitions. [2022-02-16 13:43:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:43:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:29,656 INFO L225 Difference]: With dead ends: 141 [2022-02-16 13:43:29,656 INFO L226 Difference]: Without dead ends: 138 [2022-02-16 13:43:29,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:43:29,657 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:29,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-02-16 13:43:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-16 13:43:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2022-02-16 13:43:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.6578947368421053) internal successors, (303), 114 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 303 transitions. [2022-02-16 13:43:29,659 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 303 transitions. Word has length 14 [2022-02-16 13:43:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:29,659 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 303 transitions. [2022-02-16 13:43:29,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 303 transitions. [2022-02-16 13:43:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:29,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:29,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:29,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:29,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-16 13:43:29,871 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash 456479481, now seen corresponding path program 55 times [2022-02-16 13:43:29,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:29,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033139596] [2022-02-16 13:43:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:29,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:30,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:30,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033139596] [2022-02-16 13:43:30,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033139596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:30,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590087832] [2022-02-16 13:43:30,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:43:30,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:30,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:30,021 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:30,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-16 13:43:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:30,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:30,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:30,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:30,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:30,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:30,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:30,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:30,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:30,916 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:30,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 187 [2022-02-16 13:43:30,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:30,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:30,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 165 [2022-02-16 13:43:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:31,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590087832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:31,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:31,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-16 13:43:31,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435233337] [2022-02-16 13:43:31,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:31,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:43:31,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:31,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:43:31,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:43:31,198 INFO L87 Difference]: Start difference. First operand 115 states and 303 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:31,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:31,542 INFO L93 Difference]: Finished difference Result 142 states and 369 transitions. [2022-02-16 13:43:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:43:31,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:31,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:31,543 INFO L225 Difference]: With dead ends: 142 [2022-02-16 13:43:31,543 INFO L226 Difference]: Without dead ends: 139 [2022-02-16 13:43:31,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:43:31,544 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:31,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 14 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 244 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-02-16 13:43:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-16 13:43:31,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 113. [2022-02-16 13:43:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.6517857142857144) internal successors, (297), 112 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 297 transitions. [2022-02-16 13:43:31,546 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 297 transitions. Word has length 14 [2022-02-16 13:43:31,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:31,546 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 297 transitions. [2022-02-16 13:43:31,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:31,546 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 297 transitions. [2022-02-16 13:43:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:31,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:31,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:31,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:31,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-16 13:43:31,763 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:31,763 INFO L85 PathProgramCache]: Analyzing trace with hash -844740799, now seen corresponding path program 56 times [2022-02-16 13:43:31,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:31,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373383664] [2022-02-16 13:43:31,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:31,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:31,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:31,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373383664] [2022-02-16 13:43:31,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373383664] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:31,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52760129] [2022-02-16 13:43:31,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:43:31,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:31,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:31,998 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:31,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-16 13:43:32,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:43:32,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:32,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:32,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:32,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:32,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:32,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:32,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:32,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:32,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:32,800 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:32,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 318 treesize of output 274 [2022-02-16 13:43:32,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:32,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:32,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 258 treesize of output 228 [2022-02-16 13:43:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:33,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52760129] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:33,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:33,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-16 13:43:33,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425737675] [2022-02-16 13:43:33,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:33,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:43:33,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:33,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:43:33,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:43:33,036 INFO L87 Difference]: Start difference. First operand 113 states and 297 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:33,337 INFO L93 Difference]: Finished difference Result 130 states and 326 transitions. [2022-02-16 13:43:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:43:33,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:33,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:33,338 INFO L225 Difference]: With dead ends: 130 [2022-02-16 13:43:33,338 INFO L226 Difference]: Without dead ends: 127 [2022-02-16 13:43:33,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:43:33,338 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:33,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 329 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-02-16 13:43:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-16 13:43:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2022-02-16 13:43:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.6578947368421053) internal successors, (303), 114 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 303 transitions. [2022-02-16 13:43:33,340 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 303 transitions. Word has length 14 [2022-02-16 13:43:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:33,341 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 303 transitions. [2022-02-16 13:43:33,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 303 transitions. [2022-02-16 13:43:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:33,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:33,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:33,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:33,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:33,557 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash 884306535, now seen corresponding path program 57 times [2022-02-16 13:43:33,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:33,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233659128] [2022-02-16 13:43:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:33,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:33,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:33,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233659128] [2022-02-16 13:43:33,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233659128] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:33,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740808460] [2022-02-16 13:43:33,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:43:33,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:33,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:33,725 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:33,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-16 13:43:33,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:43:33,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:33,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:33,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:33,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:33,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:33,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:33,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:33,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:34,414 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:34,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 187 [2022-02-16 13:43:34,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:34,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:34,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 165 [2022-02-16 13:43:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:34,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740808460] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:34,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:34,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:34,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181765777] [2022-02-16 13:43:34,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:34,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:34,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:34,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:34,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:34,601 INFO L87 Difference]: Start difference. First operand 115 states and 303 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:34,817 INFO L93 Difference]: Finished difference Result 145 states and 350 transitions. [2022-02-16 13:43:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:43:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:34,818 INFO L225 Difference]: With dead ends: 145 [2022-02-16 13:43:34,818 INFO L226 Difference]: Without dead ends: 139 [2022-02-16 13:43:34,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:43:34,818 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:34,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 26 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 268 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-02-16 13:43:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-16 13:43:34,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2022-02-16 13:43:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.6608695652173915) internal successors, (306), 115 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 306 transitions. [2022-02-16 13:43:34,821 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 306 transitions. Word has length 14 [2022-02-16 13:43:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:34,821 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 306 transitions. [2022-02-16 13:43:34,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 306 transitions. [2022-02-16 13:43:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:34,821 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:34,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:34,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-16 13:43:35,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:35,028 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash -605098461, now seen corresponding path program 58 times [2022-02-16 13:43:35,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:35,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212615939] [2022-02-16 13:43:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:35,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:35,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:35,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212615939] [2022-02-16 13:43:35,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212615939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:35,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504548679] [2022-02-16 13:43:35,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:43:35,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:35,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:35,284 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:35,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:43:35,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:35,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-16 13:43:35,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-16 13:43:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:35,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:35,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:35,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:35,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 86 [2022-02-16 13:43:35,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:35,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-16 13:43:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:35,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:36,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:36,323 INFO L353 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2022-02-16 13:43:36,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 206 [2022-02-16 13:43:36,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:36,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:36,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 190 treesize of output 182 [2022-02-16 13:43:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:36,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504548679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:36,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:36,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:43:36,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705240913] [2022-02-16 13:43:36,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:36,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:43:36,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:36,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:43:36,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:43:36,516 INFO L87 Difference]: Start difference. First operand 116 states and 306 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:37,002 INFO L93 Difference]: Finished difference Result 153 states and 364 transitions. [2022-02-16 13:43:37,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:43:37,002 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:37,003 INFO L225 Difference]: With dead ends: 153 [2022-02-16 13:43:37,003 INFO L226 Difference]: Without dead ends: 145 [2022-02-16 13:43:37,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:43:37,004 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:37,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 23 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 332 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-02-16 13:43:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-16 13:43:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2022-02-16 13:43:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.6578947368421053) internal successors, (303), 114 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 303 transitions. [2022-02-16 13:43:37,006 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 303 transitions. Word has length 14 [2022-02-16 13:43:37,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:37,007 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 303 transitions. [2022-02-16 13:43:37,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 303 transitions. [2022-02-16 13:43:37,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:37,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:37,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:37,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-16 13:43:37,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:37,215 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:37,216 INFO L85 PathProgramCache]: Analyzing trace with hash -597368063, now seen corresponding path program 59 times [2022-02-16 13:43:37,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:37,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491141264] [2022-02-16 13:43:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:37,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:37,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:37,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491141264] [2022-02-16 13:43:37,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491141264] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:37,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801959443] [2022-02-16 13:43:37,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:43:37,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:37,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:37,540 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:37,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-16 13:43:37,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:43:37,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:37,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:37,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:37,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:37,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2022-02-16 13:43:37,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:37,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:43:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:37,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:38,571 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-16 13:43:38,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 216 treesize of output 192 [2022-02-16 13:43:38,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:38,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:38,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 166 [2022-02-16 13:43:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:38,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801959443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:38,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:38,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-16 13:43:38,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081376098] [2022-02-16 13:43:38,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:38,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:43:38,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:43:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:43:38,797 INFO L87 Difference]: Start difference. First operand 115 states and 303 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:39,930 INFO L93 Difference]: Finished difference Result 193 states and 425 transitions. [2022-02-16 13:43:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:43:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:39,931 INFO L225 Difference]: With dead ends: 193 [2022-02-16 13:43:39,931 INFO L226 Difference]: Without dead ends: 184 [2022-02-16 13:43:39,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:43:39,931 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:39,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 38 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:43:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-16 13:43:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 125. [2022-02-16 13:43:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.7338709677419355) internal successors, (339), 124 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 339 transitions. [2022-02-16 13:43:39,934 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 339 transitions. Word has length 14 [2022-02-16 13:43:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:39,934 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 339 transitions. [2022-02-16 13:43:39,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 339 transitions. [2022-02-16 13:43:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:39,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:39,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:39,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:40,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:40,135 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1262043321, now seen corresponding path program 60 times [2022-02-16 13:43:40,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:40,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368936137] [2022-02-16 13:43:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:40,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:40,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:40,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368936137] [2022-02-16 13:43:40,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368936137] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:40,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216256117] [2022-02-16 13:43:40,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:43:40,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:40,354 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:40,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-16 13:43:40,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:43:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:40,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:40,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:40,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:40,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:40,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:40,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:40,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:41,227 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-16 13:43:41,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 207 [2022-02-16 13:43:41,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:41,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:41,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:41,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 175 [2022-02-16 13:43:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:41,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216256117] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:41,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:41,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:41,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223261188] [2022-02-16 13:43:41,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:41,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:41,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:41,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:41,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:41,509 INFO L87 Difference]: Start difference. First operand 125 states and 339 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:41,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:41,812 INFO L93 Difference]: Finished difference Result 177 states and 427 transitions. [2022-02-16 13:43:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:43:41,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:41,813 INFO L225 Difference]: With dead ends: 177 [2022-02-16 13:43:41,813 INFO L226 Difference]: Without dead ends: 168 [2022-02-16 13:43:41,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:43:41,813 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:41,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 35 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 289 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-02-16 13:43:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-16 13:43:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 131. [2022-02-16 13:43:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.753846153846154) internal successors, (358), 130 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 358 transitions. [2022-02-16 13:43:41,828 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 358 transitions. Word has length 14 [2022-02-16 13:43:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:41,829 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 358 transitions. [2022-02-16 13:43:41,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 358 transitions. [2022-02-16 13:43:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:41,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:41,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:41,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:42,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:42,043 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:42,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1303876641, now seen corresponding path program 61 times [2022-02-16 13:43:42,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:42,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649270960] [2022-02-16 13:43:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:42,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:42,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:42,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649270960] [2022-02-16 13:43:42,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649270960] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:42,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839109015] [2022-02-16 13:43:42,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:43:42,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:42,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:42,292 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:42,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-16 13:43:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:42,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:42,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:42,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:42,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:42,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:42,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:42,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:42,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:43,144 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-16 13:43:43,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 207 [2022-02-16 13:43:43,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:43,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:43,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:43,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 175 [2022-02-16 13:43:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:43,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839109015] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:43,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:43,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:43,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859754972] [2022-02-16 13:43:43,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:43,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:43,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:43,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:43,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:43,474 INFO L87 Difference]: Start difference. First operand 131 states and 358 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:43,857 INFO L93 Difference]: Finished difference Result 163 states and 412 transitions. [2022-02-16 13:43:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:43:43,857 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:43,858 INFO L225 Difference]: With dead ends: 163 [2022-02-16 13:43:43,858 INFO L226 Difference]: Without dead ends: 157 [2022-02-16 13:43:43,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:43:43,859 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:43,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 297 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-02-16 13:43:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-02-16 13:43:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 129. [2022-02-16 13:43:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.75) internal successors, (352), 128 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 352 transitions. [2022-02-16 13:43:43,861 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 352 transitions. Word has length 14 [2022-02-16 13:43:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:43,861 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 352 transitions. [2022-02-16 13:43:43,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:43,861 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 352 transitions. [2022-02-16 13:43:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:43,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:43,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:43,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-16 13:43:44,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-16 13:43:44,076 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:44,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:44,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1720196257, now seen corresponding path program 62 times [2022-02-16 13:43:44,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:44,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593589776] [2022-02-16 13:43:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:44,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:44,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:44,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593589776] [2022-02-16 13:43:44,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593589776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:44,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075096838] [2022-02-16 13:43:44,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:43:44,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:44,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:44,326 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:44,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-16 13:43:44,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:43:44,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:44,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:44,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:44,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:44,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:44,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:43:44,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:44,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:43:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:44,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:45,296 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-16 13:43:45,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 207 [2022-02-16 13:43:45,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:45,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:45,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:45,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 175 [2022-02-16 13:43:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:45,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075096838] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:45,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:45,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-16 13:43:45,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256494603] [2022-02-16 13:43:45,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:45,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:43:45,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:45,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:43:45,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:43:45,689 INFO L87 Difference]: Start difference. First operand 129 states and 352 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:46,269 INFO L93 Difference]: Finished difference Result 182 states and 446 transitions. [2022-02-16 13:43:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:43:46,269 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:46,270 INFO L225 Difference]: With dead ends: 182 [2022-02-16 13:43:46,270 INFO L226 Difference]: Without dead ends: 170 [2022-02-16 13:43:46,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:43:46,271 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:46,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 489 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-02-16 13:43:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-16 13:43:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2022-02-16 13:43:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8161764705882355) internal successors, (383), 136 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 383 transitions. [2022-02-16 13:43:46,273 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 383 transitions. Word has length 14 [2022-02-16 13:43:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:46,273 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 383 transitions. [2022-02-16 13:43:46,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 383 transitions. [2022-02-16 13:43:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:43:46,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:46,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:46,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:46,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-02-16 13:43:46,474 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:46,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1093096441, now seen corresponding path program 63 times [2022-02-16 13:43:46,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:46,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286451096] [2022-02-16 13:43:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:46,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:46,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:46,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286451096] [2022-02-16 13:43:46,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286451096] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:46,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051867149] [2022-02-16 13:43:46,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:43:46,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:46,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:46,644 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:46,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-16 13:43:46,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:43:46,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:43:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:46,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:43:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:46,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2022-02-16 13:43:46,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:46,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:43:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:46,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:47,402 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-16 13:43:47,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 244 treesize of output 208 [2022-02-16 13:43:47,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:47,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:47,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:47,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 176 [2022-02-16 13:43:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:47,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051867149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:47,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:47,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-16 13:43:47,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160106410] [2022-02-16 13:43:47,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:47,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:43:47,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:47,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:43:47,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:43:47,846 INFO L87 Difference]: Start difference. First operand 137 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:48,236 INFO L93 Difference]: Finished difference Result 204 states and 500 transitions. [2022-02-16 13:43:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:43:48,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:43:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:48,237 INFO L225 Difference]: With dead ends: 204 [2022-02-16 13:43:48,237 INFO L226 Difference]: Without dead ends: 198 [2022-02-16 13:43:48,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:43:48,237 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 62 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:48,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 31 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:43:48,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-16 13:43:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 140. [2022-02-16 13:43:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.820143884892086) internal successors, (392), 139 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 392 transitions. [2022-02-16 13:43:48,240 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 392 transitions. Word has length 14 [2022-02-16 13:43:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:48,240 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 392 transitions. [2022-02-16 13:43:48,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 392 transitions. [2022-02-16 13:43:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:48,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:48,240 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:48,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:48,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-02-16 13:43:48,447 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1862349497, now seen corresponding path program 64 times [2022-02-16 13:43:48,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:48,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350577846] [2022-02-16 13:43:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:48,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:48,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:48,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350577846] [2022-02-16 13:43:48,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350577846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:48,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617899193] [2022-02-16 13:43:48,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:43:48,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:48,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:48,530 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:48,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-16 13:43:48,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:43:48,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:48,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:48,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:48,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:43:48,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:43:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:48,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:48,787 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:43:48,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:43:48,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:43:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:48,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617899193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:48,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:48,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 13:43:48,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10525977] [2022-02-16 13:43:48,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:48,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:43:48,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:43:48,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:43:48,804 INFO L87 Difference]: Start difference. First operand 140 states and 392 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:49,051 INFO L93 Difference]: Finished difference Result 177 states and 473 transitions. [2022-02-16 13:43:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:43:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:49,052 INFO L225 Difference]: With dead ends: 177 [2022-02-16 13:43:49,052 INFO L226 Difference]: Without dead ends: 173 [2022-02-16 13:43:49,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:43:49,053 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:49,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:43:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-16 13:43:49,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 139. [2022-02-16 13:43:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8260869565217392) internal successors, (390), 138 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 390 transitions. [2022-02-16 13:43:49,055 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 390 transitions. Word has length 15 [2022-02-16 13:43:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:49,055 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 390 transitions. [2022-02-16 13:43:49,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 390 transitions. [2022-02-16 13:43:49,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:49,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:49,056 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:49,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:49,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-16 13:43:49,256 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:49,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:49,256 INFO L85 PathProgramCache]: Analyzing trace with hash -757032713, now seen corresponding path program 65 times [2022-02-16 13:43:49,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:49,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379262597] [2022-02-16 13:43:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:49,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:49,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:49,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379262597] [2022-02-16 13:43:49,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379262597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:49,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919776751] [2022-02-16 13:43:49,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:43:49,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:49,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:49,343 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:49,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-16 13:43:49,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:43:49,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:49,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:49,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:49,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:43:49,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:43:49,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:43:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:49,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:49,575 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:43:49,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:43:49,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:43:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:49,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919776751] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:49,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:49,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 13:43:49,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657426531] [2022-02-16 13:43:49,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:49,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:43:49,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:43:49,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:43:49,588 INFO L87 Difference]: Start difference. First operand 139 states and 390 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:49,775 INFO L93 Difference]: Finished difference Result 179 states and 481 transitions. [2022-02-16 13:43:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:43:49,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:49,776 INFO L225 Difference]: With dead ends: 179 [2022-02-16 13:43:49,776 INFO L226 Difference]: Without dead ends: 179 [2022-02-16 13:43:49,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:43:49,776 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:49,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:43:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-16 13:43:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2022-02-16 13:43:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.827338129496403) internal successors, (393), 139 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 393 transitions. [2022-02-16 13:43:49,778 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 393 transitions. Word has length 15 [2022-02-16 13:43:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:49,779 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 393 transitions. [2022-02-16 13:43:49,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:49,779 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 393 transitions. [2022-02-16 13:43:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:49,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:49,779 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:49,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-16 13:43:49,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:49,987 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:49,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash -313196909, now seen corresponding path program 66 times [2022-02-16 13:43:49,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:49,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681585817] [2022-02-16 13:43:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:49,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:50,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:50,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681585817] [2022-02-16 13:43:50,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681585817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:50,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129520076] [2022-02-16 13:43:50,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:43:50,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:50,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:50,079 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:50,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-16 13:43:50,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:43:50,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:50,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:50,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:50,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:43:50,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:50,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:43:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:50,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:50,396 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:43:50,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:43:50,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:43:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:50,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129520076] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:50,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:50,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:43:50,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526681727] [2022-02-16 13:43:50,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:50,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:43:50,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:43:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:43:50,415 INFO L87 Difference]: Start difference. First operand 140 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:50,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:50,744 INFO L93 Difference]: Finished difference Result 216 states and 533 transitions. [2022-02-16 13:43:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:43:50,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:50,745 INFO L225 Difference]: With dead ends: 216 [2022-02-16 13:43:50,745 INFO L226 Difference]: Without dead ends: 216 [2022-02-16 13:43:50,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:43:50,746 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 97 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:50,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 60 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:43:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-16 13:43:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 144. [2022-02-16 13:43:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8461538461538463) internal successors, (407), 143 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 407 transitions. [2022-02-16 13:43:50,748 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 407 transitions. Word has length 15 [2022-02-16 13:43:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:50,748 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 407 transitions. [2022-02-16 13:43:50,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 407 transitions. [2022-02-16 13:43:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:50,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:50,749 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:50,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:50,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:50,963 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash 488419319, now seen corresponding path program 67 times [2022-02-16 13:43:50,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:50,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141194532] [2022-02-16 13:43:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:50,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:51,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:51,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141194532] [2022-02-16 13:43:51,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141194532] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:51,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948628903] [2022-02-16 13:43:51,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:43:51,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:51,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:51,067 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:51,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-16 13:43:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:51,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:51,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:51,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:51,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:43:51,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:51,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:43:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:51,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:51,372 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:43:51,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:43:51,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:43:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:51,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948628903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:51,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:51,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:43:51,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21970521] [2022-02-16 13:43:51,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:51,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:43:51,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:51,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:43:51,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:43:51,383 INFO L87 Difference]: Start difference. First operand 144 states and 407 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:52,795 INFO L93 Difference]: Finished difference Result 263 states and 615 transitions. [2022-02-16 13:43:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 13:43:52,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:52,796 INFO L225 Difference]: With dead ends: 263 [2022-02-16 13:43:52,796 INFO L226 Difference]: Without dead ends: 258 [2022-02-16 13:43:52,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=467, Invalid=2289, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 13:43:52,796 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 117 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:52,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 64 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:43:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-16 13:43:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 156. [2022-02-16 13:43:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.870967741935484) internal successors, (445), 155 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 445 transitions. [2022-02-16 13:43:52,799 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 445 transitions. Word has length 15 [2022-02-16 13:43:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:52,799 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 445 transitions. [2022-02-16 13:43:52,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 445 transitions. [2022-02-16 13:43:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:52,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:52,800 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:52,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:53,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:53,017 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2088204271, now seen corresponding path program 68 times [2022-02-16 13:43:53,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:53,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645374639] [2022-02-16 13:43:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:53,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:53,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:53,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645374639] [2022-02-16 13:43:53,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645374639] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:53,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567570305] [2022-02-16 13:43:53,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:43:53,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:53,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:53,121 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:53,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-16 13:43:53,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:43:53,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:53,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:53,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:53,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:53,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:43:53,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:53,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:43:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:53,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:53,415 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:43:53,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:43:53,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:43:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:53,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567570305] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:53,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:53,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:43:53,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039059497] [2022-02-16 13:43:53,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:53,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:43:53,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:53,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:43:53,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:43:53,428 INFO L87 Difference]: Start difference. First operand 156 states and 445 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:54,209 INFO L93 Difference]: Finished difference Result 240 states and 592 transitions. [2022-02-16 13:43:54,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:43:54,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:54,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:54,210 INFO L225 Difference]: With dead ends: 240 [2022-02-16 13:43:54,210 INFO L226 Difference]: Without dead ends: 240 [2022-02-16 13:43:54,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:43:54,211 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 69 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:54,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 40 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:43:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-16 13:43:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 153. [2022-02-16 13:43:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.848684210526316) internal successors, (433), 152 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 433 transitions. [2022-02-16 13:43:54,213 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 433 transitions. Word has length 15 [2022-02-16 13:43:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:54,213 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 433 transitions. [2022-02-16 13:43:54,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 433 transitions. [2022-02-16 13:43:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:54,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:54,214 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:54,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-16 13:43:54,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-02-16 13:43:54,427 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:54,428 INFO L85 PathProgramCache]: Analyzing trace with hash 496149717, now seen corresponding path program 69 times [2022-02-16 13:43:54,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:54,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821436511] [2022-02-16 13:43:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:54,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:54,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:54,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821436511] [2022-02-16 13:43:54,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821436511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:54,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972135344] [2022-02-16 13:43:54,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:43:54,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:54,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:54,543 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:54,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-16 13:43:54,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:43:54,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:54,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:54,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:43:54,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:54,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:43:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:54,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:54,908 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:43:54,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:43:54,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:43:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:54,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972135344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:54,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:54,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:43:54,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138201508] [2022-02-16 13:43:54,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:54,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:43:54,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:43:54,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:43:54,919 INFO L87 Difference]: Start difference. First operand 153 states and 433 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:55,372 INFO L93 Difference]: Finished difference Result 219 states and 571 transitions. [2022-02-16 13:43:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:43:55,372 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:55,373 INFO L225 Difference]: With dead ends: 219 [2022-02-16 13:43:55,373 INFO L226 Difference]: Without dead ends: 219 [2022-02-16 13:43:55,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:43:55,374 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 52 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:55,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 22 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 355 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-02-16 13:43:55,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-16 13:43:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 155. [2022-02-16 13:43:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.844155844155844) internal successors, (438), 154 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 438 transitions. [2022-02-16 13:43:55,376 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 438 transitions. Word has length 15 [2022-02-16 13:43:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:55,376 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 438 transitions. [2022-02-16 13:43:55,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 438 transitions. [2022-02-16 13:43:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:55,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:55,377 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:55,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:55,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:55,587 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1505045545, now seen corresponding path program 70 times [2022-02-16 13:43:55,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:55,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948904483] [2022-02-16 13:43:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:55,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:55,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:55,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948904483] [2022-02-16 13:43:55,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948904483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:55,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28720054] [2022-02-16 13:43:55,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:43:55,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:55,664 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:55,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-16 13:43:55,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:43:55,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:55,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:55,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:55,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:55,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:43:55,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:55,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:43:55,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:55,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:43:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:55,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:55,862 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:43:55,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:43:55,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:43:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:55,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28720054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:55,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:55,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:43:55,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122775773] [2022-02-16 13:43:55,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:55,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:43:55,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:43:55,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:43:55,880 INFO L87 Difference]: Start difference. First operand 155 states and 438 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:56,106 INFO L93 Difference]: Finished difference Result 232 states and 594 transitions. [2022-02-16 13:43:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:43:56,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:56,107 INFO L225 Difference]: With dead ends: 232 [2022-02-16 13:43:56,107 INFO L226 Difference]: Without dead ends: 232 [2022-02-16 13:43:56,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:43:56,107 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:56,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 64 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:43:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-16 13:43:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 173. [2022-02-16 13:43:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.947674418604651) internal successors, (507), 172 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 507 transitions. [2022-02-16 13:43:56,110 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 507 transitions. Word has length 15 [2022-02-16 13:43:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:56,110 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 507 transitions. [2022-02-16 13:43:56,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:56,110 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 507 transitions. [2022-02-16 13:43:56,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:56,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:56,111 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:56,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:56,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:56,326 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:56,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1870221043, now seen corresponding path program 71 times [2022-02-16 13:43:56,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:56,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167786943] [2022-02-16 13:43:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:56,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:56,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:56,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167786943] [2022-02-16 13:43:56,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167786943] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:56,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850899349] [2022-02-16 13:43:56,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:43:56,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:56,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:56,402 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:56,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-16 13:43:56,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:43:56,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:56,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:56,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:56,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:56,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:43:56,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:56,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:43:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:56,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:56,572 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:43:56,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:43:56,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:43:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:56,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850899349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:56,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:56,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:43:56,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057056609] [2022-02-16 13:43:56,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:56,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:43:56,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:43:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:43:56,587 INFO L87 Difference]: Start difference. First operand 173 states and 507 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:56,771 INFO L93 Difference]: Finished difference Result 216 states and 565 transitions. [2022-02-16 13:43:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:43:56,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:56,772 INFO L225 Difference]: With dead ends: 216 [2022-02-16 13:43:56,772 INFO L226 Difference]: Without dead ends: 212 [2022-02-16 13:43:56,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:43:56,772 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:56,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 56 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:43:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-16 13:43:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 174. [2022-02-16 13:43:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.9190751445086707) internal successors, (505), 173 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 505 transitions. [2022-02-16 13:43:56,775 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 505 transitions. Word has length 15 [2022-02-16 13:43:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:56,775 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 505 transitions. [2022-02-16 13:43:56,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:56,776 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 505 transitions. [2022-02-16 13:43:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:56,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:56,777 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:56,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:56,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-02-16 13:43:56,992 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:56,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1497315147, now seen corresponding path program 72 times [2022-02-16 13:43:56,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:56,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988795676] [2022-02-16 13:43:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:56,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:57,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:57,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988795676] [2022-02-16 13:43:57,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988795676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:57,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949435990] [2022-02-16 13:43:57,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:43:57,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:57,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:57,048 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:57,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-16 13:43:57,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:43:57,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:57,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:57,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:57,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:43:57,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:57,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:43:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:57,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:57,248 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:43:57,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:43:57,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:43:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:57,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949435990] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:57,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:57,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:43:57,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072835495] [2022-02-16 13:43:57,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:57,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:43:57,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:57,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:43:57,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:43:57,271 INFO L87 Difference]: Start difference. First operand 174 states and 505 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:57,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:57,492 INFO L93 Difference]: Finished difference Result 278 states and 662 transitions. [2022-02-16 13:43:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:43:57,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:57,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:57,493 INFO L225 Difference]: With dead ends: 278 [2022-02-16 13:43:57,493 INFO L226 Difference]: Without dead ends: 277 [2022-02-16 13:43:57,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:43:57,494 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 99 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:57,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 62 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:43:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-02-16 13:43:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 177. [2022-02-16 13:43:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9261363636363638) internal successors, (515), 176 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 515 transitions. [2022-02-16 13:43:57,504 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 515 transitions. Word has length 15 [2022-02-16 13:43:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:57,504 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 515 transitions. [2022-02-16 13:43:57,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 515 transitions. [2022-02-16 13:43:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:57,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:57,504 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:57,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:57,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:57,719 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash -695698919, now seen corresponding path program 73 times [2022-02-16 13:43:57,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:57,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096260395] [2022-02-16 13:43:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:57,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:57,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:57,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096260395] [2022-02-16 13:43:57,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096260395] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:57,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859900877] [2022-02-16 13:43:57,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:43:57,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:57,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:57,807 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:57,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-16 13:43:57,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:57,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:57,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:43:57,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:57,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:43:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:57,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:58,060 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:43:58,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:43:58,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:43:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:58,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859900877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:58,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:58,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:43:58,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221884843] [2022-02-16 13:43:58,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:58,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:43:58,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:43:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:43:58,090 INFO L87 Difference]: Start difference. First operand 177 states and 515 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:58,470 INFO L93 Difference]: Finished difference Result 250 states and 618 transitions. [2022-02-16 13:43:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:43:58,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:58,471 INFO L225 Difference]: With dead ends: 250 [2022-02-16 13:43:58,471 INFO L226 Difference]: Without dead ends: 247 [2022-02-16 13:43:58,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:43:58,471 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 75 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:58,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 52 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:43:58,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-02-16 13:43:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 181. [2022-02-16 13:43:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9055555555555554) internal successors, (523), 180 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 523 transitions. [2022-02-16 13:43:58,474 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 523 transitions. Word has length 15 [2022-02-16 13:43:58,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:58,475 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 523 transitions. [2022-02-16 13:43:58,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 523 transitions. [2022-02-16 13:43:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:58,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:58,475 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:58,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:58,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:58,687 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:58,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1022644787, now seen corresponding path program 74 times [2022-02-16 13:43:58,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:58,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101981200] [2022-02-16 13:43:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:58,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:58,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:58,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101981200] [2022-02-16 13:43:58,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101981200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:58,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963686754] [2022-02-16 13:43:58,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:43:58,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:58,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:58,759 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:58,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-16 13:43:58,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:43:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:58,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:58,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:58,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:43:58,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:58,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:43:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:58,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:58,985 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:43:58,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:43:58,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:43:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:59,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963686754] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:59,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:59,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:43:59,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924679526] [2022-02-16 13:43:59,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:59,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:43:59,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:43:59,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:43:59,008 INFO L87 Difference]: Start difference. First operand 181 states and 523 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:59,279 INFO L93 Difference]: Finished difference Result 236 states and 594 transitions. [2022-02-16 13:43:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:43:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:43:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:59,280 INFO L225 Difference]: With dead ends: 236 [2022-02-16 13:43:59,280 INFO L226 Difference]: Without dead ends: 236 [2022-02-16 13:43:59,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:43:59,280 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:59,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 74 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:43:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-16 13:43:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 177. [2022-02-16 13:43:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.8693181818181817) internal successors, (505), 176 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 505 transitions. [2022-02-16 13:43:59,283 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 505 transitions. Word has length 15 [2022-02-16 13:43:59,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:59,283 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 505 transitions. [2022-02-16 13:43:59,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 505 transitions. [2022-02-16 13:43:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:43:59,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:59,284 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:59,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:59,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:59,491 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1379198957, now seen corresponding path program 75 times [2022-02-16 13:43:59,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:59,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252892271] [2022-02-16 13:43:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:59,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:59,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:59,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252892271] [2022-02-16 13:43:59,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252892271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:59,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731506815] [2022-02-16 13:43:59,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:43:59,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:59,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:59,573 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:59,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-16 13:43:59,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:43:59,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:59,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:43:59,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:59,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:59,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:43:59,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:43:59,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:43:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:59,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:59,829 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:43:59,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:43:59,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:43:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:59,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731506815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:59,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:59,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:43:59,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609603586] [2022-02-16 13:43:59,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:59,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:43:59,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:59,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:43:59,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:43:59,855 INFO L87 Difference]: Start difference. First operand 177 states and 505 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:00,316 INFO L93 Difference]: Finished difference Result 242 states and 605 transitions. [2022-02-16 13:44:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:44:00,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:00,317 INFO L225 Difference]: With dead ends: 242 [2022-02-16 13:44:00,317 INFO L226 Difference]: Without dead ends: 240 [2022-02-16 13:44:00,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:44:00,318 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:00,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 46 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:00,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-16 13:44:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 183. [2022-02-16 13:44:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.8626373626373627) internal successors, (521), 182 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 521 transitions. [2022-02-16 13:44:00,320 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 521 transitions. Word has length 15 [2022-02-16 13:44:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:00,321 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 521 transitions. [2022-02-16 13:44:00,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 521 transitions. [2022-02-16 13:44:00,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:00,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:00,321 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:00,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:00,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-02-16 13:44:00,531 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash 349848377, now seen corresponding path program 76 times [2022-02-16 13:44:00,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:00,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550493478] [2022-02-16 13:44:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:00,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:00,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:00,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550493478] [2022-02-16 13:44:00,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550493478] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:00,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31942497] [2022-02-16 13:44:00,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:00,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:00,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:00,604 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:00,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-16 13:44:00,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:00,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:00,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:00,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:00,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:00,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:44:00,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:00,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:44:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:00,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:00,836 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:00,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:44:00,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:00,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31942497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:00,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:00,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:00,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071389634] [2022-02-16 13:44:00,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:00,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:00,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:00,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:00,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:00,863 INFO L87 Difference]: Start difference. First operand 183 states and 521 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:01,182 INFO L93 Difference]: Finished difference Result 215 states and 565 transitions. [2022-02-16 13:44:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:44:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:01,183 INFO L225 Difference]: With dead ends: 215 [2022-02-16 13:44:01,184 INFO L226 Difference]: Without dead ends: 211 [2022-02-16 13:44:01,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:44:01,184 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:01,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 54 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 382 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-02-16 13:44:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-16 13:44:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 184. [2022-02-16 13:44:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.8360655737704916) internal successors, (519), 183 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 519 transitions. [2022-02-16 13:44:01,187 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 519 transitions. Word has length 15 [2022-02-16 13:44:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:01,187 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 519 transitions. [2022-02-16 13:44:01,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 519 transitions. [2022-02-16 13:44:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:01,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:01,187 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:01,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-16 13:44:01,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-02-16 13:44:01,399 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:01,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2117593779, now seen corresponding path program 77 times [2022-02-16 13:44:01,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:01,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086444070] [2022-02-16 13:44:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:01,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:01,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:01,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086444070] [2022-02-16 13:44:01,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086444070] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:01,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024034500] [2022-02-16 13:44:01,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:01,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:01,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:01,475 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:01,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-16 13:44:01,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:44:01,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:01,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:01,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:01,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:01,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:01,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:01,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:01,631 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:01,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:01,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:01,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024034500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:01,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:01,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:01,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802110180] [2022-02-16 13:44:01,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:01,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:01,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:01,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:01,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:01,644 INFO L87 Difference]: Start difference. First operand 184 states and 519 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:01,810 INFO L93 Difference]: Finished difference Result 248 states and 634 transitions. [2022-02-16 13:44:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:44:01,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:01,811 INFO L225 Difference]: With dead ends: 248 [2022-02-16 13:44:01,811 INFO L226 Difference]: Without dead ends: 248 [2022-02-16 13:44:01,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:44:01,812 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:01,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 58 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 316 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-02-16 13:44:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-16 13:44:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 188. [2022-02-16 13:44:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.8502673796791442) internal successors, (533), 187 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 533 transitions. [2022-02-16 13:44:01,815 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 533 transitions. Word has length 15 [2022-02-16 13:44:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:01,815 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 533 transitions. [2022-02-16 13:44:01,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 533 transitions. [2022-02-16 13:44:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:01,815 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:01,815 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:01,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-16 13:44:02,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:02,023 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash -569852331, now seen corresponding path program 78 times [2022-02-16 13:44:02,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:02,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986299891] [2022-02-16 13:44:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:02,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:02,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:02,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986299891] [2022-02-16 13:44:02,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986299891] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:02,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665121495] [2022-02-16 13:44:02,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:02,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:02,099 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:02,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-16 13:44:02,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:44:02,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:02,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:02,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:02,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:02,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:02,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:02,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:02,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:02,323 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:02,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:02,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:02,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665121495] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:02,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:02,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:02,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924149516] [2022-02-16 13:44:02,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:02,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:02,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:02,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:02,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:02,334 INFO L87 Difference]: Start difference. First operand 188 states and 533 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:02,488 INFO L93 Difference]: Finished difference Result 245 states and 622 transitions. [2022-02-16 13:44:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:02,489 INFO L225 Difference]: With dead ends: 245 [2022-02-16 13:44:02,489 INFO L226 Difference]: Without dead ends: 245 [2022-02-16 13:44:02,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:44:02,489 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:02,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 80 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 444 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-02-16 13:44:02,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-16 13:44:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 187. [2022-02-16 13:44:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.8440860215053765) internal successors, (529), 186 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 529 transitions. [2022-02-16 13:44:02,495 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 529 transitions. Word has length 15 [2022-02-16 13:44:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:02,495 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 529 transitions. [2022-02-16 13:44:02,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 529 transitions. [2022-02-16 13:44:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:02,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:02,496 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:02,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-02-16 13:44:02,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-02-16 13:44:02,699 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:02,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1913634763, now seen corresponding path program 79 times [2022-02-16 13:44:02,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:02,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980101680] [2022-02-16 13:44:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:02,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:02,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:02,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980101680] [2022-02-16 13:44:02,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980101680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:02,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145366231] [2022-02-16 13:44:02,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:02,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:02,775 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:02,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-16 13:44:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:02,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:02,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:02,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:02,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:02,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:02,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:02,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:02,957 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:02,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:02,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:02,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145366231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:02,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:02,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:02,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681830175] [2022-02-16 13:44:02,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:02,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:02,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:02,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:02,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:02,971 INFO L87 Difference]: Start difference. First operand 187 states and 529 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:03,121 INFO L93 Difference]: Finished difference Result 259 states and 647 transitions. [2022-02-16 13:44:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:44:03,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:03,123 INFO L225 Difference]: With dead ends: 259 [2022-02-16 13:44:03,123 INFO L226 Difference]: Without dead ends: 259 [2022-02-16 13:44:03,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:44:03,123 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 97 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:03,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 50 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-02-16 13:44:03,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 195. [2022-02-16 13:44:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.881443298969072) internal successors, (559), 194 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 559 transitions. [2022-02-16 13:44:03,140 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 559 transitions. Word has length 15 [2022-02-16 13:44:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:03,141 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 559 transitions. [2022-02-16 13:44:03,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 559 transitions. [2022-02-16 13:44:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:03,141 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:03,141 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:03,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:03,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:03,359 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1112018535, now seen corresponding path program 80 times [2022-02-16 13:44:03,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:03,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694660732] [2022-02-16 13:44:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:03,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:03,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:03,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694660732] [2022-02-16 13:44:03,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694660732] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:03,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786413696] [2022-02-16 13:44:03,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:03,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:03,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:03,442 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:03,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-16 13:44:03,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:03,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:03,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:03,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:03,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:03,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:03,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:03,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:03,715 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:03,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:03,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:03,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786413696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:03,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:03,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:03,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78309621] [2022-02-16 13:44:03,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:03,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:03,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:03,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:03,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:03,739 INFO L87 Difference]: Start difference. First operand 195 states and 559 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:04,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:04,461 INFO L93 Difference]: Finished difference Result 274 states and 677 transitions. [2022-02-16 13:44:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:44:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:04,462 INFO L225 Difference]: With dead ends: 274 [2022-02-16 13:44:04,462 INFO L226 Difference]: Without dead ends: 269 [2022-02-16 13:44:04,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 13:44:04,462 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 88 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:04,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 50 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-16 13:44:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2022-02-16 13:44:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.892156862745098) internal successors, (590), 204 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 590 transitions. [2022-02-16 13:44:04,465 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 590 transitions. Word has length 15 [2022-02-16 13:44:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:04,466 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 590 transitions. [2022-02-16 13:44:04,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 590 transitions. [2022-02-16 13:44:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:04,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:04,466 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:04,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:04,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:04,687 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:04,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash 606325171, now seen corresponding path program 81 times [2022-02-16 13:44:04,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:04,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112709282] [2022-02-16 13:44:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:04,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:04,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:04,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112709282] [2022-02-16 13:44:04,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112709282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:04,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404420980] [2022-02-16 13:44:04,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:04,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:04,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:04,770 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:04,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-16 13:44:04,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:44:04,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:04,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:04,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:04,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:04,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:04,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:04,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:04,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:05,037 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:05,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:05,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:05,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404420980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:05,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:05,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:05,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318159719] [2022-02-16 13:44:05,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:05,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:05,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:05,075 INFO L87 Difference]: Start difference. First operand 205 states and 590 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:05,557 INFO L93 Difference]: Finished difference Result 258 states and 660 transitions. [2022-02-16 13:44:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:44:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:05,559 INFO L225 Difference]: With dead ends: 258 [2022-02-16 13:44:05,559 INFO L226 Difference]: Without dead ends: 258 [2022-02-16 13:44:05,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:44:05,559 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:05,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 30 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:05,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-16 13:44:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 195. [2022-02-16 13:44:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.845360824742268) internal successors, (552), 194 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 552 transitions. [2022-02-16 13:44:05,562 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 552 transitions. Word has length 15 [2022-02-16 13:44:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:05,562 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 552 transitions. [2022-02-16 13:44:05,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 552 transitions. [2022-02-16 13:44:05,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:05,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:05,563 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:05,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-16 13:44:05,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:05,778 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:05,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1104288137, now seen corresponding path program 82 times [2022-02-16 13:44:05,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:05,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274159345] [2022-02-16 13:44:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:05,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:05,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:05,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274159345] [2022-02-16 13:44:05,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274159345] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:05,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580087391] [2022-02-16 13:44:05,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:05,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:05,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:05,890 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:05,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-16 13:44:05,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:05,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:05,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:06,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:06,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:06,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:06,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:06,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:06,188 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:06,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:06,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:06,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580087391] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:06,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:06,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:06,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070339703] [2022-02-16 13:44:06,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:06,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:06,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:06,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:06,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:06,208 INFO L87 Difference]: Start difference. First operand 195 states and 552 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:06,514 INFO L93 Difference]: Finished difference Result 229 states and 614 transitions. [2022-02-16 13:44:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:44:06,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:06,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:06,516 INFO L225 Difference]: With dead ends: 229 [2022-02-16 13:44:06,516 INFO L226 Difference]: Without dead ends: 229 [2022-02-16 13:44:06,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:44:06,516 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:06,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-02-16 13:44:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-16 13:44:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 202. [2022-02-16 13:44:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.845771144278607) internal successors, (572), 201 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 572 transitions. [2022-02-16 13:44:06,519 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 572 transitions. Word has length 15 [2022-02-16 13:44:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:06,519 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 572 transitions. [2022-02-16 13:44:06,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:06,520 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 572 transitions. [2022-02-16 13:44:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:06,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:06,520 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:06,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-02-16 13:44:06,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:06,721 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:06,722 INFO L85 PathProgramCache]: Analyzing trace with hash 503233049, now seen corresponding path program 83 times [2022-02-16 13:44:06,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:06,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138011515] [2022-02-16 13:44:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:06,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:06,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:06,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138011515] [2022-02-16 13:44:06,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138011515] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:06,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076361260] [2022-02-16 13:44:06,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:06,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:06,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:06,799 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:06,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-16 13:44:06,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:44:06,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:06,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:06,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:06,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:06,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:06,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:06,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:07,049 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:07,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:07,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:07,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076361260] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:07,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:07,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:07,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716752263] [2022-02-16 13:44:07,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:07,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:07,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:07,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:07,064 INFO L87 Difference]: Start difference. First operand 202 states and 572 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:07,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:07,333 INFO L93 Difference]: Finished difference Result 232 states and 622 transitions. [2022-02-16 13:44:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:44:07,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:07,334 INFO L225 Difference]: With dead ends: 232 [2022-02-16 13:44:07,334 INFO L226 Difference]: Without dead ends: 232 [2022-02-16 13:44:07,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:44:07,334 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:07,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-02-16 13:44:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-16 13:44:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 192. [2022-02-16 13:44:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.837696335078534) internal successors, (542), 191 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 542 transitions. [2022-02-16 13:44:07,337 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 542 transitions. Word has length 15 [2022-02-16 13:44:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:07,337 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 542 transitions. [2022-02-16 13:44:07,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 542 transitions. [2022-02-16 13:44:07,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:07,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:07,337 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:07,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-16 13:44:07,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:07,551 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:07,552 INFO L85 PathProgramCache]: Analyzing trace with hash 202352403, now seen corresponding path program 84 times [2022-02-16 13:44:07,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:07,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148237704] [2022-02-16 13:44:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:07,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:07,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:07,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148237704] [2022-02-16 13:44:07,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148237704] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:07,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790447833] [2022-02-16 13:44:07,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:07,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:07,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:07,629 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:07,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-16 13:44:07,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:44:07,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:07,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:07,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:07,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:07,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:07,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:07,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:44:07,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:07,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:44:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:07,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:07,898 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:07,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:07,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:07,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790447833] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:07,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:07,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:07,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456363680] [2022-02-16 13:44:07,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:07,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:07,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:07,916 INFO L87 Difference]: Start difference. First operand 192 states and 542 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:08,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:08,121 INFO L93 Difference]: Finished difference Result 261 states and 661 transitions. [2022-02-16 13:44:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:08,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:08,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:08,123 INFO L225 Difference]: With dead ends: 261 [2022-02-16 13:44:08,123 INFO L226 Difference]: Without dead ends: 261 [2022-02-16 13:44:08,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:44:08,123 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:08,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 110 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:08,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-16 13:44:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 203. [2022-02-16 13:44:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.876237623762376) internal successors, (581), 202 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 581 transitions. [2022-02-16 13:44:08,126 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 581 transitions. Word has length 15 [2022-02-16 13:44:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:08,126 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 581 transitions. [2022-02-16 13:44:08,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 581 transitions. [2022-02-16 13:44:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:08,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:08,127 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:08,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:08,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-02-16 13:44:08,340 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:08,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1756401527, now seen corresponding path program 85 times [2022-02-16 13:44:08,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:08,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337381021] [2022-02-16 13:44:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:08,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:08,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:08,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337381021] [2022-02-16 13:44:08,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337381021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:08,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713587193] [2022-02-16 13:44:08,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:08,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:08,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:08,420 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:08,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-16 13:44:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:08,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:08,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:08,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:44:08,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:08,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:44:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:08,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:08,702 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:08,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:08,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:08,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713587193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:08,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:08,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:08,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442584063] [2022-02-16 13:44:08,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:08,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:08,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:08,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:08,725 INFO L87 Difference]: Start difference. First operand 203 states and 581 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:09,011 INFO L93 Difference]: Finished difference Result 248 states and 635 transitions. [2022-02-16 13:44:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:44:09,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:09,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:09,012 INFO L225 Difference]: With dead ends: 248 [2022-02-16 13:44:09,013 INFO L226 Difference]: Without dead ends: 242 [2022-02-16 13:44:09,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:44:09,013 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:09,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 66 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-16 13:44:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 205. [2022-02-16 13:44:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.8529411764705883) internal successors, (582), 204 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 582 transitions. [2022-02-16 13:44:09,016 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 582 transitions. Word has length 15 [2022-02-16 13:44:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:09,016 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 582 transitions. [2022-02-16 13:44:09,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 582 transitions. [2022-02-16 13:44:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:09,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:09,017 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:09,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:09,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-02-16 13:44:09,227 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:09,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash 441994741, now seen corresponding path program 86 times [2022-02-16 13:44:09,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:09,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981605795] [2022-02-16 13:44:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:09,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:09,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:09,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981605795] [2022-02-16 13:44:09,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981605795] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:09,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121732473] [2022-02-16 13:44:09,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:09,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:09,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:09,314 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:09,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-16 13:44:09,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:09,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:09,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:09,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:09,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:09,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:09,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:09,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:44:09,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:09,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:44:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:09,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:09,608 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:09,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:09,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:09,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121732473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:09,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:09,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:09,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402033958] [2022-02-16 13:44:09,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:09,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:09,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:09,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:09,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:09,626 INFO L87 Difference]: Start difference. First operand 205 states and 582 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:10,279 INFO L93 Difference]: Finished difference Result 291 states and 719 transitions. [2022-02-16 13:44:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:44:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:10,280 INFO L225 Difference]: With dead ends: 291 [2022-02-16 13:44:10,280 INFO L226 Difference]: Without dead ends: 287 [2022-02-16 13:44:10,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:44:10,281 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 76 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:10,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 64 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:10,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-16 13:44:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 208. [2022-02-16 13:44:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.8550724637681157) internal successors, (591), 207 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 591 transitions. [2022-02-16 13:44:10,284 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 591 transitions. Word has length 15 [2022-02-16 13:44:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:10,284 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 591 transitions. [2022-02-16 13:44:10,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 591 transitions. [2022-02-16 13:44:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:10,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:10,285 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:10,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-16 13:44:10,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-02-16 13:44:10,493 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:10,494 INFO L85 PathProgramCache]: Analyzing trace with hash -477705967, now seen corresponding path program 87 times [2022-02-16 13:44:10,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:10,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302069556] [2022-02-16 13:44:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:10,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:10,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:10,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302069556] [2022-02-16 13:44:10,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302069556] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:10,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487656911] [2022-02-16 13:44:10,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:10,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:10,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:10,576 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:10,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-16 13:44:10,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:44:10,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:10,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:10,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:10,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:10,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:44:10,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:10,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:44:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:10,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:10,825 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:10,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:10,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:10,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487656911] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:10,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:10,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:10,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410480062] [2022-02-16 13:44:10,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:10,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:10,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:10,841 INFO L87 Difference]: Start difference. First operand 208 states and 591 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:11,144 INFO L93 Difference]: Finished difference Result 249 states and 642 transitions. [2022-02-16 13:44:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:44:11,144 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:11,145 INFO L225 Difference]: With dead ends: 249 [2022-02-16 13:44:11,145 INFO L226 Difference]: Without dead ends: 243 [2022-02-16 13:44:11,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:44:11,145 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:11,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 56 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-16 13:44:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 209. [2022-02-16 13:44:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.8413461538461537) internal successors, (591), 208 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 591 transitions. [2022-02-16 13:44:11,149 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 591 transitions. Word has length 15 [2022-02-16 13:44:11,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:11,149 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 591 transitions. [2022-02-16 13:44:11,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:11,149 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 591 transitions. [2022-02-16 13:44:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:11,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:11,152 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:11,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-02-16 13:44:11,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-16 13:44:11,369 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:11,370 INFO L85 PathProgramCache]: Analyzing trace with hash 449725139, now seen corresponding path program 88 times [2022-02-16 13:44:11,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:11,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63252745] [2022-02-16 13:44:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:11,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:11,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:11,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63252745] [2022-02-16 13:44:11,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63252745] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:11,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348220690] [2022-02-16 13:44:11,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:11,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:11,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:11,454 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:11,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-16 13:44:11,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:11,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:11,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:11,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:11,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:11,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:11,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:11,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:11,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:11,653 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:11,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:11,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:11,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348220690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:11,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:11,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:11,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153932367] [2022-02-16 13:44:11,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:11,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:11,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:11,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:11,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:11,664 INFO L87 Difference]: Start difference. First operand 209 states and 591 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:12,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:12,068 INFO L93 Difference]: Finished difference Result 303 states and 708 transitions. [2022-02-16 13:44:12,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:44:12,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:12,069 INFO L225 Difference]: With dead ends: 303 [2022-02-16 13:44:12,069 INFO L226 Difference]: Without dead ends: 302 [2022-02-16 13:44:12,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:44:12,070 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 137 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:12,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 80 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:12,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-16 13:44:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 208. [2022-02-16 13:44:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.821256038647343) internal successors, (584), 207 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 584 transitions. [2022-02-16 13:44:12,088 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 584 transitions. Word has length 15 [2022-02-16 13:44:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:12,088 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 584 transitions. [2022-02-16 13:44:12,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 584 transitions. [2022-02-16 13:44:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:12,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:12,088 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:12,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:12,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:12,305 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:12,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1251341367, now seen corresponding path program 89 times [2022-02-16 13:44:12,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:12,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524249520] [2022-02-16 13:44:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:12,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:12,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:12,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524249520] [2022-02-16 13:44:12,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524249520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:12,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397646145] [2022-02-16 13:44:12,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:12,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:12,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:12,385 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:12,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-16 13:44:12,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:44:12,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:12,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:12,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:12,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:12,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:12,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:12,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:12,585 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:12,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:12,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:12,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397646145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:12,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:12,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:12,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086077386] [2022-02-16 13:44:12,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:12,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:12,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:12,600 INFO L87 Difference]: Start difference. First operand 208 states and 584 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:12,888 INFO L93 Difference]: Finished difference Result 264 states and 656 transitions. [2022-02-16 13:44:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:44:12,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:12,889 INFO L225 Difference]: With dead ends: 264 [2022-02-16 13:44:12,889 INFO L226 Difference]: Without dead ends: 260 [2022-02-16 13:44:12,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:44:12,889 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:12,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 68 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-16 13:44:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 210. [2022-02-16 13:44:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.813397129186603) internal successors, (588), 209 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 588 transitions. [2022-02-16 13:44:12,892 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 588 transitions. Word has length 15 [2022-02-16 13:44:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:12,892 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 588 transitions. [2022-02-16 13:44:12,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 588 transitions. [2022-02-16 13:44:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:12,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:12,893 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:12,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:13,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-16 13:44:13,109 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:13,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1325282223, now seen corresponding path program 90 times [2022-02-16 13:44:13,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:13,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618998049] [2022-02-16 13:44:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:13,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:13,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:13,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618998049] [2022-02-16 13:44:13,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618998049] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:13,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596114475] [2022-02-16 13:44:13,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:13,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:13,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:13,205 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:13,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-16 13:44:13,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:44:13,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:13,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:13,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:13,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:13,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:13,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:13,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:13,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:13,401 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:13,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:13,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:13,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596114475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:13,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:13,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:13,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700787455] [2022-02-16 13:44:13,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:13,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:13,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:13,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:13,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:13,416 INFO L87 Difference]: Start difference. First operand 210 states and 588 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:13,623 INFO L93 Difference]: Finished difference Result 254 states and 647 transitions. [2022-02-16 13:44:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:13,624 INFO L225 Difference]: With dead ends: 254 [2022-02-16 13:44:13,624 INFO L226 Difference]: Without dead ends: 254 [2022-02-16 13:44:13,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:44:13,624 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:13,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 80 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-16 13:44:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 207. [2022-02-16 13:44:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.8009708737864076) internal successors, (577), 206 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 577 transitions. [2022-02-16 13:44:13,627 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 577 transitions. Word has length 15 [2022-02-16 13:44:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:13,627 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 577 transitions. [2022-02-16 13:44:13,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 577 transitions. [2022-02-16 13:44:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:13,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:13,628 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:13,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-16 13:44:13,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-16 13:44:13,845 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1164635591, now seen corresponding path program 91 times [2022-02-16 13:44:13,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:13,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155199063] [2022-02-16 13:44:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:13,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:44:13,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:13,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155199063] [2022-02-16 13:44:13,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155199063] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:13,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260911768] [2022-02-16 13:44:13,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:13,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:13,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:13,926 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:13,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-16 13:44:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:13,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:13,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:14,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:14,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:14,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:14,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:14,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:14,098 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:14,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:14,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:44:14,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260911768] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:14,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:14,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:14,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361538415] [2022-02-16 13:44:14,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:14,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:14,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:14,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:14,111 INFO L87 Difference]: Start difference. First operand 207 states and 577 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:14,385 INFO L93 Difference]: Finished difference Result 229 states and 619 transitions. [2022-02-16 13:44:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:44:14,385 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:14,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:14,386 INFO L225 Difference]: With dead ends: 229 [2022-02-16 13:44:14,386 INFO L226 Difference]: Without dead ends: 227 [2022-02-16 13:44:14,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:44:14,386 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:14,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 18 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:14,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-16 13:44:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 207. [2022-02-16 13:44:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.79126213592233) internal successors, (575), 206 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 575 transitions. [2022-02-16 13:44:14,389 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 575 transitions. Word has length 15 [2022-02-16 13:44:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:14,389 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 575 transitions. [2022-02-16 13:44:14,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 575 transitions. [2022-02-16 13:44:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:14,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:14,390 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:14,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:14,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-02-16 13:44:14,599 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash 33405523, now seen corresponding path program 92 times [2022-02-16 13:44:14,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:14,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028707040] [2022-02-16 13:44:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:14,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:14,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:14,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028707040] [2022-02-16 13:44:14,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028707040] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:14,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055605227] [2022-02-16 13:44:14,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:14,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:14,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:14,682 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:14,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-16 13:44:14,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:14,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:14,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:14,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:14,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:14,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:14,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:14,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:14,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:14,914 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:14,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:44:14,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:14,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055605227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:14,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:14,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:14,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085782638] [2022-02-16 13:44:14,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:14,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:14,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:14,937 INFO L87 Difference]: Start difference. First operand 207 states and 575 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:15,137 INFO L93 Difference]: Finished difference Result 288 states and 707 transitions. [2022-02-16 13:44:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:15,137 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:15,138 INFO L225 Difference]: With dead ends: 288 [2022-02-16 13:44:15,138 INFO L226 Difference]: Without dead ends: 288 [2022-02-16 13:44:15,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:44:15,138 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:15,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 66 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-16 13:44:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 219. [2022-02-16 13:44:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.834862385321101) internal successors, (618), 218 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 618 transitions. [2022-02-16 13:44:15,143 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 618 transitions. Word has length 15 [2022-02-16 13:44:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:15,143 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 618 transitions. [2022-02-16 13:44:15,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 618 transitions. [2022-02-16 13:44:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:15,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:15,143 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:15,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:15,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-02-16 13:44:15,357 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:15,357 INFO L85 PathProgramCache]: Analyzing trace with hash 835021751, now seen corresponding path program 93 times [2022-02-16 13:44:15,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:15,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918996120] [2022-02-16 13:44:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:15,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:15,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:15,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918996120] [2022-02-16 13:44:15,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918996120] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:15,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195599478] [2022-02-16 13:44:15,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:15,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:15,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:15,428 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:15,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-16 13:44:15,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:44:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:15,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:15,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:15,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:15,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:15,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:15,682 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:15,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:15,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:15,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195599478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:15,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:15,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 16 [2022-02-16 13:44:15,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345172932] [2022-02-16 13:44:15,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:15,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:15,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:15,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:15,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:15,703 INFO L87 Difference]: Start difference. First operand 219 states and 618 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:16,129 INFO L93 Difference]: Finished difference Result 326 states and 769 transitions. [2022-02-16 13:44:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:44:16,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:16,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:16,130 INFO L225 Difference]: With dead ends: 326 [2022-02-16 13:44:16,130 INFO L226 Difference]: Without dead ends: 322 [2022-02-16 13:44:16,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:44:16,130 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:16,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 70 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-16 13:44:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 226. [2022-02-16 13:44:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.848888888888889) internal successors, (641), 225 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 641 transitions. [2022-02-16 13:44:16,133 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 641 transitions. Word has length 15 [2022-02-16 13:44:16,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:16,134 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 641 transitions. [2022-02-16 13:44:16,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 641 transitions. [2022-02-16 13:44:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:16,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:16,134 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:16,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:16,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:16,343 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1741601839, now seen corresponding path program 94 times [2022-02-16 13:44:16,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:16,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830335559] [2022-02-16 13:44:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:16,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:16,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:16,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830335559] [2022-02-16 13:44:16,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830335559] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:16,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732773739] [2022-02-16 13:44:16,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:16,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:16,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:16,414 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:16,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-16 13:44:16,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:16,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:16,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:16,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:16,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:16,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:16,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:16,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:16,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:16,654 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:16,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:16,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:16,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732773739] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:16,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:16,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:16,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348531747] [2022-02-16 13:44:16,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:16,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:16,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:16,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:16,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:16,686 INFO L87 Difference]: Start difference. First operand 226 states and 641 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:16,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:16,969 INFO L93 Difference]: Finished difference Result 292 states and 729 transitions. [2022-02-16 13:44:16,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:44:16,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:16,970 INFO L225 Difference]: With dead ends: 292 [2022-02-16 13:44:16,970 INFO L226 Difference]: Without dead ends: 292 [2022-02-16 13:44:16,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:44:16,970 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:16,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 84 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-16 13:44:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 220. [2022-02-16 13:44:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.8219178082191783) internal successors, (618), 219 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 618 transitions. [2022-02-16 13:44:16,974 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 618 transitions. Word has length 15 [2022-02-16 13:44:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:16,974 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 618 transitions. [2022-02-16 13:44:16,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 618 transitions. [2022-02-16 13:44:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:16,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:16,974 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:16,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-02-16 13:44:17,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-16 13:44:17,183 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:17,184 INFO L85 PathProgramCache]: Analyzing trace with hash 842752149, now seen corresponding path program 95 times [2022-02-16 13:44:17,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:17,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18254750] [2022-02-16 13:44:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:17,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:17,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:17,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18254750] [2022-02-16 13:44:17,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18254750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:17,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411533585] [2022-02-16 13:44:17,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:17,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:17,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:17,265 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:17,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-16 13:44:17,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:44:17,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:17,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:17,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:17,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:17,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:17,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:17,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:17,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:17,470 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:17,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:17,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:17,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411533585] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:17,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:17,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:17,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446483395] [2022-02-16 13:44:17,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:17,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:17,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:17,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:17,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:17,487 INFO L87 Difference]: Start difference. First operand 220 states and 618 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:17,660 INFO L93 Difference]: Finished difference Result 277 states and 702 transitions. [2022-02-16 13:44:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:44:17,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:17,661 INFO L225 Difference]: With dead ends: 277 [2022-02-16 13:44:17,662 INFO L226 Difference]: Without dead ends: 277 [2022-02-16 13:44:17,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:17,662 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:17,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 98 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 419 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-02-16 13:44:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-02-16 13:44:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 219. [2022-02-16 13:44:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.81651376146789) internal successors, (614), 218 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 614 transitions. [2022-02-16 13:44:17,669 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 614 transitions. Word has length 15 [2022-02-16 13:44:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:17,669 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 614 transitions. [2022-02-16 13:44:17,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 614 transitions. [2022-02-16 13:44:17,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:17,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:17,670 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:17,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-02-16 13:44:17,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:17,883 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash 12399315, now seen corresponding path program 96 times [2022-02-16 13:44:17,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:17,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547094456] [2022-02-16 13:44:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:17,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:17,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:17,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547094456] [2022-02-16 13:44:17,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547094456] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:17,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428982855] [2022-02-16 13:44:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:17,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:17,975 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:17,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-16 13:44:18,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:44:18,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:18,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:18,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:18,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:18,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:18,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:18,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:18,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:18,281 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:18,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:18,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:18,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428982855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:18,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:18,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:18,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244153254] [2022-02-16 13:44:18,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:18,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:18,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:18,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:18,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:18,296 INFO L87 Difference]: Start difference. First operand 219 states and 614 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:18,465 INFO L93 Difference]: Finished difference Result 304 states and 751 transitions. [2022-02-16 13:44:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:18,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:18,466 INFO L225 Difference]: With dead ends: 304 [2022-02-16 13:44:18,466 INFO L226 Difference]: Without dead ends: 304 [2022-02-16 13:44:18,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:44:18,467 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 102 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:18,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 56 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-16 13:44:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 230. [2022-02-16 13:44:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8558951965065504) internal successors, (654), 229 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 654 transitions. [2022-02-16 13:44:18,470 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 654 transitions. Word has length 15 [2022-02-16 13:44:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:18,470 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 654 transitions. [2022-02-16 13:44:18,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 654 transitions. [2022-02-16 13:44:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:18,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:18,470 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:18,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:18,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:18,677 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash 814015543, now seen corresponding path program 97 times [2022-02-16 13:44:18,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:18,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717891650] [2022-02-16 13:44:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:18,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:18,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:18,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717891650] [2022-02-16 13:44:18,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717891650] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:18,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185428522] [2022-02-16 13:44:18,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:18,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:18,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:18,785 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:18,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:18,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-16 13:44:18,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:18,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:18,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:18,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:18,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:19,029 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:19,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:19,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:19,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185428522] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:19,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:19,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:19,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173860133] [2022-02-16 13:44:19,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:19,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:19,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:19,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:19,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:19,041 INFO L87 Difference]: Start difference. First operand 230 states and 654 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:19,532 INFO L93 Difference]: Finished difference Result 322 states and 787 transitions. [2022-02-16 13:44:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:44:19,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:19,532 INFO L225 Difference]: With dead ends: 322 [2022-02-16 13:44:19,533 INFO L226 Difference]: Without dead ends: 316 [2022-02-16 13:44:19,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:44:19,533 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:19,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 70 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-16 13:44:19,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 243. [2022-02-16 13:44:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.871900826446281) internal successors, (695), 242 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 695 transitions. [2022-02-16 13:44:19,536 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 695 transitions. Word has length 15 [2022-02-16 13:44:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:19,537 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 695 transitions. [2022-02-16 13:44:19,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 695 transitions. [2022-02-16 13:44:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:19,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:19,537 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:19,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:19,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:19,745 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:19,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1762608047, now seen corresponding path program 98 times [2022-02-16 13:44:19,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:19,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649899614] [2022-02-16 13:44:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:19,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:19,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:19,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649899614] [2022-02-16 13:44:19,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649899614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:19,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034595893] [2022-02-16 13:44:19,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:19,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:19,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:19,831 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:19,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-16 13:44:19,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:19,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:19,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:19,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:19,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:19,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:19,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:19,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:19,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:20,078 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:20,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:20,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:20,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034595893] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:20,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:20,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:44:20,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522517190] [2022-02-16 13:44:20,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:20,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:44:20,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:20,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:44:20,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:44:20,092 INFO L87 Difference]: Start difference. First operand 243 states and 695 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:20,579 INFO L93 Difference]: Finished difference Result 312 states and 775 transitions. [2022-02-16 13:44:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:44:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:20,580 INFO L225 Difference]: With dead ends: 312 [2022-02-16 13:44:20,580 INFO L226 Difference]: Without dead ends: 311 [2022-02-16 13:44:20,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:44:20,581 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:20,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 52 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-16 13:44:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 225. [2022-02-16 13:44:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.8035714285714284) internal successors, (628), 224 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 628 transitions. [2022-02-16 13:44:20,585 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 628 transitions. Word has length 15 [2022-02-16 13:44:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:20,585 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 628 transitions. [2022-02-16 13:44:20,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 628 transitions. [2022-02-16 13:44:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:20,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:20,585 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:20,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:20,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-16 13:44:20,797 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash 821745941, now seen corresponding path program 99 times [2022-02-16 13:44:20,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:20,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573997027] [2022-02-16 13:44:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:20,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:20,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:20,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573997027] [2022-02-16 13:44:20,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573997027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:20,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105898335] [2022-02-16 13:44:20,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:20,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:20,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:20,887 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:20,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-16 13:44:20,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:44:20,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:20,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:20,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:21,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:21,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:21,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:21,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:21,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:21,211 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:21,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:21,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:21,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105898335] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:21,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:21,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:21,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019350458] [2022-02-16 13:44:21,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:21,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:21,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:21,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:21,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:21,229 INFO L87 Difference]: Start difference. First operand 225 states and 628 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:21,787 INFO L93 Difference]: Finished difference Result 271 states and 702 transitions. [2022-02-16 13:44:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:44:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:21,788 INFO L225 Difference]: With dead ends: 271 [2022-02-16 13:44:21,788 INFO L226 Difference]: Without dead ends: 271 [2022-02-16 13:44:21,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:44:21,789 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:21,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 76 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 360 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-02-16 13:44:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-02-16 13:44:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 234. [2022-02-16 13:44:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.8068669527896994) internal successors, (654), 233 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 654 transitions. [2022-02-16 13:44:21,792 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 654 transitions. Word has length 15 [2022-02-16 13:44:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:21,792 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 654 transitions. [2022-02-16 13:44:21,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 654 transitions. [2022-02-16 13:44:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:21,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:21,792 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:21,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:21,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:21,995 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash 710923421, now seen corresponding path program 100 times [2022-02-16 13:44:21,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:21,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905214476] [2022-02-16 13:44:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:21,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:22,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:22,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905214476] [2022-02-16 13:44:22,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905214476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:22,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755837852] [2022-02-16 13:44:22,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:22,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:22,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:22,085 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:22,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-16 13:44:22,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:22,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:22,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:22,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:22,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:22,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:22,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:22,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:22,280 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:22,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:22,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:22,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755837852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:22,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:22,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:22,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445447587] [2022-02-16 13:44:22,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:22,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:22,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:22,291 INFO L87 Difference]: Start difference. First operand 234 states and 654 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:22,730 INFO L93 Difference]: Finished difference Result 279 states and 714 transitions. [2022-02-16 13:44:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:44:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:22,731 INFO L225 Difference]: With dead ends: 279 [2022-02-16 13:44:22,731 INFO L226 Difference]: Without dead ends: 279 [2022-02-16 13:44:22,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:44:22,732 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:22,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 54 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 357 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-02-16 13:44:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-16 13:44:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 232. [2022-02-16 13:44:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.8051948051948052) internal successors, (648), 231 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 648 transitions. [2022-02-16 13:44:22,736 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 648 transitions. Word has length 15 [2022-02-16 13:44:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:22,736 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 648 transitions. [2022-02-16 13:44:22,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 648 transitions. [2022-02-16 13:44:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:22,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:22,737 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:22,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:22,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:22,950 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1865700169, now seen corresponding path program 101 times [2022-02-16 13:44:22,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:22,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71836370] [2022-02-16 13:44:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:22,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:23,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:23,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71836370] [2022-02-16 13:44:23,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71836370] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:23,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460773254] [2022-02-16 13:44:23,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:23,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:23,011 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:23,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-16 13:44:23,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:44:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:23,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:23,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:23,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:23,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:23,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:23,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:23,213 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:23,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:23,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:23,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460773254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:23,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:23,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:23,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120280759] [2022-02-16 13:44:23,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:23,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:23,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:23,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:23,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:23,225 INFO L87 Difference]: Start difference. First operand 232 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:23,558 INFO L93 Difference]: Finished difference Result 266 states and 696 transitions. [2022-02-16 13:44:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:44:23,558 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:23,559 INFO L225 Difference]: With dead ends: 266 [2022-02-16 13:44:23,559 INFO L226 Difference]: Without dead ends: 266 [2022-02-16 13:44:23,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:44:23,559 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:23,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 46 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 358 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-02-16 13:44:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-16 13:44:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 222. [2022-02-16 13:44:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.7963800904977374) internal successors, (618), 221 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 618 transitions. [2022-02-16 13:44:23,562 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 618 transitions. Word has length 15 [2022-02-16 13:44:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:23,562 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 618 transitions. [2022-02-16 13:44:23,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 618 transitions. [2022-02-16 13:44:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:23,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:23,562 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:23,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:23,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-16 13:44:23,778 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:23,778 INFO L85 PathProgramCache]: Analyzing trace with hash -667659055, now seen corresponding path program 102 times [2022-02-16 13:44:23,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:23,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529841751] [2022-02-16 13:44:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:23,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:23,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:23,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529841751] [2022-02-16 13:44:23,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529841751] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:23,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643473457] [2022-02-16 13:44:23,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:23,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:23,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:23,856 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:23,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-16 13:44:23,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:44:23,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:23,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:23,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:23,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:23,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:23,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:23,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:23,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:24,034 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:24,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:24,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:24,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643473457] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:24,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:24,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:24,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655845886] [2022-02-16 13:44:24,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:24,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:24,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:24,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:24,046 INFO L87 Difference]: Start difference. First operand 222 states and 618 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:24,158 INFO L93 Difference]: Finished difference Result 258 states and 686 transitions. [2022-02-16 13:44:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:44:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:24,159 INFO L225 Difference]: With dead ends: 258 [2022-02-16 13:44:24,159 INFO L226 Difference]: Without dead ends: 258 [2022-02-16 13:44:24,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:44:24,159 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:24,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 281 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-02-16 13:44:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-16 13:44:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 226. [2022-02-16 13:44:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.8) internal successors, (630), 225 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 630 transitions. [2022-02-16 13:44:24,162 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 630 transitions. Word has length 15 [2022-02-16 13:44:24,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:24,162 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 630 transitions. [2022-02-16 13:44:24,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:24,162 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 630 transitions. [2022-02-16 13:44:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:24,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:24,163 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:24,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-02-16 13:44:24,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-02-16 13:44:24,363 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:24,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1626057831, now seen corresponding path program 103 times [2022-02-16 13:44:24,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:24,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051778884] [2022-02-16 13:44:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:24,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:24,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:24,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051778884] [2022-02-16 13:44:24,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051778884] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:24,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665104558] [2022-02-16 13:44:24,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:24,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:24,421 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:24,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-16 13:44:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:24,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:24,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:24,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:24,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:24,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:24,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:24,610 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:24,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:24,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:24,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665104558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:24,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:24,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:24,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971779168] [2022-02-16 13:44:24,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:24,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:24,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:24,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:24,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:24,623 INFO L87 Difference]: Start difference. First operand 226 states and 630 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:24,733 INFO L93 Difference]: Finished difference Result 254 states and 674 transitions. [2022-02-16 13:44:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:44:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:24,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:24,734 INFO L225 Difference]: With dead ends: 254 [2022-02-16 13:44:24,734 INFO L226 Difference]: Without dead ends: 254 [2022-02-16 13:44:24,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:44:24,735 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:24,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 44 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 285 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-02-16 13:44:24,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-16 13:44:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 225. [2022-02-16 13:44:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.799107142857143) internal successors, (627), 224 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 627 transitions. [2022-02-16 13:44:24,738 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 627 transitions. Word has length 15 [2022-02-16 13:44:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:24,738 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 627 transitions. [2022-02-16 13:44:24,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 627 transitions. [2022-02-16 13:44:24,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:24,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:24,738 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:24,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:24,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:24,951 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1814621851, now seen corresponding path program 104 times [2022-02-16 13:44:24,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:24,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561916105] [2022-02-16 13:44:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:24,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:25,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:25,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561916105] [2022-02-16 13:44:25,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561916105] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:25,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995481738] [2022-02-16 13:44:25,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:25,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:25,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:25,012 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:25,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-16 13:44:25,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:25,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:25,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:25,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:25,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:44:25,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:44:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:25,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:25,237 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:44:25,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:44:25,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:44:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:25,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995481738] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:25,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:25,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 13:44:25,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341713842] [2022-02-16 13:44:25,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:25,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:44:25,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:25,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:44:25,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:44:25,248 INFO L87 Difference]: Start difference. First operand 225 states and 627 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:25,430 INFO L93 Difference]: Finished difference Result 291 states and 782 transitions. [2022-02-16 13:44:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:44:25,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:25,431 INFO L225 Difference]: With dead ends: 291 [2022-02-16 13:44:25,431 INFO L226 Difference]: Without dead ends: 291 [2022-02-16 13:44:25,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:44:25,432 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:25,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 38 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-16 13:44:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 224. [2022-02-16 13:44:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.807174887892377) internal successors, (626), 223 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 626 transitions. [2022-02-16 13:44:25,435 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 626 transitions. Word has length 15 [2022-02-16 13:44:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:25,435 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 626 transitions. [2022-02-16 13:44:25,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 626 transitions. [2022-02-16 13:44:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:25,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:25,435 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:25,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-02-16 13:44:25,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:25,652 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1256099443, now seen corresponding path program 105 times [2022-02-16 13:44:25,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:25,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375934606] [2022-02-16 13:44:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:25,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:25,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:25,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375934606] [2022-02-16 13:44:25,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375934606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:25,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872149724] [2022-02-16 13:44:25,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:25,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:25,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:25,731 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:25,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-16 13:44:25,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:44:25,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:25,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:25,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:25,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:44:25,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:44:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:25,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:25,984 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:44:25,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:44:25,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:26,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872149724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:26,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:26,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 13:44:26,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854284917] [2022-02-16 13:44:26,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:26,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:44:26,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:26,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:44:26,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:44:26,001 INFO L87 Difference]: Start difference. First operand 224 states and 626 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:26,254 INFO L93 Difference]: Finished difference Result 288 states and 772 transitions. [2022-02-16 13:44:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:44:26,254 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:26,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:26,255 INFO L225 Difference]: With dead ends: 288 [2022-02-16 13:44:26,255 INFO L226 Difference]: Without dead ends: 284 [2022-02-16 13:44:26,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:44:26,255 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 50 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:26,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 28 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:26,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-16 13:44:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 224. [2022-02-16 13:44:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.802690582959641) internal successors, (625), 223 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 625 transitions. [2022-02-16 13:44:26,258 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 625 transitions. Word has length 15 [2022-02-16 13:44:26,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:26,258 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 625 transitions. [2022-02-16 13:44:26,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 625 transitions. [2022-02-16 13:44:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:26,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:26,259 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:26,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:26,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-02-16 13:44:26,471 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:26,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash 237280121, now seen corresponding path program 106 times [2022-02-16 13:44:26,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:26,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172925785] [2022-02-16 13:44:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:26,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:26,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:26,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172925785] [2022-02-16 13:44:26,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172925785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:26,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231470268] [2022-02-16 13:44:26,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:26,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:26,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:26,563 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:26,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-16 13:44:26,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:26,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:26,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:26,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:26,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:26,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:26,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:26,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:26,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:26,800 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:44:26,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:44:26,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:44:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:26,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231470268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:26,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:26,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:26,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645036690] [2022-02-16 13:44:26,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:26,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:26,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:26,816 INFO L87 Difference]: Start difference. First operand 224 states and 625 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:26,990 INFO L93 Difference]: Finished difference Result 305 states and 809 transitions. [2022-02-16 13:44:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:44:26,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:26,991 INFO L225 Difference]: With dead ends: 305 [2022-02-16 13:44:26,991 INFO L226 Difference]: Without dead ends: 305 [2022-02-16 13:44:26,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:44:26,992 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:26,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 20 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-02-16 13:44:26,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-16 13:44:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 227. [2022-02-16 13:44:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.8053097345132745) internal successors, (634), 226 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 634 transitions. [2022-02-16 13:44:26,995 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 634 transitions. Word has length 15 [2022-02-16 13:44:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:26,995 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 634 transitions. [2022-02-16 13:44:26,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 634 transitions. [2022-02-16 13:44:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:26,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:26,995 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:27,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:27,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:27,212 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:27,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:27,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1791329245, now seen corresponding path program 107 times [2022-02-16 13:44:27,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:27,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486927707] [2022-02-16 13:44:27,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:27,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:27,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:27,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486927707] [2022-02-16 13:44:27,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486927707] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:27,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987265784] [2022-02-16 13:44:27,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:27,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:27,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:27,287 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:27,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-16 13:44:27,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:44:27,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:27,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:27,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:27,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:27,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:44:27,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:27,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:44:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:27,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:27,574 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:44:27,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:44:27,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:27,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987265784] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:27,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:27,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:27,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320914019] [2022-02-16 13:44:27,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:27,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:27,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:27,595 INFO L87 Difference]: Start difference. First operand 227 states and 634 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:27,875 INFO L93 Difference]: Finished difference Result 291 states and 778 transitions. [2022-02-16 13:44:27,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:27,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:27,876 INFO L225 Difference]: With dead ends: 291 [2022-02-16 13:44:27,876 INFO L226 Difference]: Without dead ends: 288 [2022-02-16 13:44:27,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:44:27,876 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:27,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 303 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-02-16 13:44:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-16 13:44:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 227. [2022-02-16 13:44:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.8008849557522124) internal successors, (633), 226 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 633 transitions. [2022-02-16 13:44:27,880 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 633 transitions. Word has length 15 [2022-02-16 13:44:27,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:27,880 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 633 transitions. [2022-02-16 13:44:27,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:27,880 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 633 transitions. [2022-02-16 13:44:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:27,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:27,880 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:27,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:28,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:28,081 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:28,081 INFO L85 PathProgramCache]: Analyzing trace with hash 476922459, now seen corresponding path program 108 times [2022-02-16 13:44:28,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:28,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023227525] [2022-02-16 13:44:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:28,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:28,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:28,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023227525] [2022-02-16 13:44:28,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023227525] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:28,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272156847] [2022-02-16 13:44:28,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:28,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:28,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:28,187 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:28,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-16 13:44:28,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:44:28,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:28,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:28,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:28,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:28,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:28,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:28,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:28,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:28,457 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:44:28,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:44:28,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:44:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:28,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272156847] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:28,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:28,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:28,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18316177] [2022-02-16 13:44:28,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:28,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:28,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:28,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:28,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:28,468 INFO L87 Difference]: Start difference. First operand 227 states and 633 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:28,972 INFO L93 Difference]: Finished difference Result 317 states and 834 transitions. [2022-02-16 13:44:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:44:28,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:28,973 INFO L225 Difference]: With dead ends: 317 [2022-02-16 13:44:28,973 INFO L226 Difference]: Without dead ends: 317 [2022-02-16 13:44:28,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:44:28,974 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:28,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 22 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 306 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-02-16 13:44:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-16 13:44:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 230. [2022-02-16 13:44:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8034934497816595) internal successors, (642), 229 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 642 transitions. [2022-02-16 13:44:28,977 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 642 transitions. Word has length 15 [2022-02-16 13:44:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:28,977 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 642 transitions. [2022-02-16 13:44:28,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 642 transitions. [2022-02-16 13:44:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:28,977 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:28,977 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:28,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:29,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-02-16 13:44:29,178 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:29,178 INFO L85 PathProgramCache]: Analyzing trace with hash -442778249, now seen corresponding path program 109 times [2022-02-16 13:44:29,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:29,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215901907] [2022-02-16 13:44:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:29,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:29,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:29,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215901907] [2022-02-16 13:44:29,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215901907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:29,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137968826] [2022-02-16 13:44:29,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:29,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:29,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:29,244 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:29,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-16 13:44:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:29,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:29,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:29,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:29,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:44:29,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:29,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:44:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:29,592 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:44:29,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:44:29,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:29,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137968826] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:29,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:29,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:29,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604186836] [2022-02-16 13:44:29,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:29,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:29,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:29,613 INFO L87 Difference]: Start difference. First operand 230 states and 642 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:29,915 INFO L93 Difference]: Finished difference Result 298 states and 792 transitions. [2022-02-16 13:44:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:44:29,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:29,916 INFO L225 Difference]: With dead ends: 298 [2022-02-16 13:44:29,916 INFO L226 Difference]: Without dead ends: 296 [2022-02-16 13:44:29,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:44:29,917 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:29,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 316 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-02-16 13:44:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-16 13:44:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 232. [2022-02-16 13:44:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.8008658008658007) internal successors, (647), 231 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 647 transitions. [2022-02-16 13:44:29,920 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 647 transitions. Word has length 15 [2022-02-16 13:44:29,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:29,920 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 647 transitions. [2022-02-16 13:44:29,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 647 transitions. [2022-02-16 13:44:29,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:29,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:29,920 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:29,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:30,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:30,131 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash 484652857, now seen corresponding path program 110 times [2022-02-16 13:44:30,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:30,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119899337] [2022-02-16 13:44:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:30,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:30,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:30,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119899337] [2022-02-16 13:44:30,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119899337] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:30,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821368859] [2022-02-16 13:44:30,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:30,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:30,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:30,212 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:30,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-16 13:44:30,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:30,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:30,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:30,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:30,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:30,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:30,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:30,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:30,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:30,514 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:44:30,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:44:30,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:44:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:30,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821368859] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:30,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:30,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:30,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449070904] [2022-02-16 13:44:30,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:30,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:30,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:30,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:30,527 INFO L87 Difference]: Start difference. First operand 232 states and 647 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:31,374 INFO L93 Difference]: Finished difference Result 396 states and 935 transitions. [2022-02-16 13:44:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:44:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:31,375 INFO L225 Difference]: With dead ends: 396 [2022-02-16 13:44:31,375 INFO L226 Difference]: Without dead ends: 396 [2022-02-16 13:44:31,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:44:31,375 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 132 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:31,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 66 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-02-16 13:44:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 234. [2022-02-16 13:44:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.815450643776824) internal successors, (656), 233 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 656 transitions. [2022-02-16 13:44:31,379 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 656 transitions. Word has length 15 [2022-02-16 13:44:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:31,379 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 656 transitions. [2022-02-16 13:44:31,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 656 transitions. [2022-02-16 13:44:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:31,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:31,379 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:31,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-16 13:44:31,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-16 13:44:31,596 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1286269085, now seen corresponding path program 111 times [2022-02-16 13:44:31,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:31,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081884369] [2022-02-16 13:44:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:31,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:31,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:31,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081884369] [2022-02-16 13:44:31,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081884369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:31,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236638858] [2022-02-16 13:44:31,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:31,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:31,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:31,657 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:31,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-16 13:44:31,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:44:31,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:31,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:31,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:31,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:31,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:31,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:31,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:31,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:31,885 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:44:31,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:44:31,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:31,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236638858] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:31,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:31,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:31,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872631639] [2022-02-16 13:44:31,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:31,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:31,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:31,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:31,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:31,915 INFO L87 Difference]: Start difference. First operand 234 states and 656 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:32,260 INFO L93 Difference]: Finished difference Result 326 states and 836 transitions. [2022-02-16 13:44:32,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:44:32,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:32,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:32,261 INFO L225 Difference]: With dead ends: 326 [2022-02-16 13:44:32,261 INFO L226 Difference]: Without dead ends: 324 [2022-02-16 13:44:32,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:44:32,261 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 106 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:32,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 48 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:32,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-16 13:44:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 236. [2022-02-16 13:44:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.8170212765957445) internal successors, (662), 235 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 662 transitions. [2022-02-16 13:44:32,264 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 662 transitions. Word has length 15 [2022-02-16 13:44:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:32,265 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 662 transitions. [2022-02-16 13:44:32,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 662 transitions. [2022-02-16 13:44:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:32,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:32,265 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:32,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:32,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-16 13:44:32,482 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1290354505, now seen corresponding path program 112 times [2022-02-16 13:44:32,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:32,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860905082] [2022-02-16 13:44:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:32,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:32,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:32,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860905082] [2022-02-16 13:44:32,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860905082] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:32,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916829255] [2022-02-16 13:44:32,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:32,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:32,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:32,543 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:32,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-16 13:44:32,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:32,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:32,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:32,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:32,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:32,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:32,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:32,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:32,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:32,746 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:44:32,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:44:32,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:32,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916829255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:32,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:32,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:32,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393033186] [2022-02-16 13:44:32,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:32,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:32,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:32,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:32,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:32,758 INFO L87 Difference]: Start difference. First operand 236 states and 662 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:32,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:32,981 INFO L93 Difference]: Finished difference Result 316 states and 823 transitions. [2022-02-16 13:44:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:32,982 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:32,982 INFO L225 Difference]: With dead ends: 316 [2022-02-16 13:44:32,982 INFO L226 Difference]: Without dead ends: 316 [2022-02-16 13:44:32,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:44:32,983 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:32,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 80 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-16 13:44:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 233. [2022-02-16 13:44:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.8060344827586206) internal successors, (651), 232 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 651 transitions. [2022-02-16 13:44:32,986 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 651 transitions. Word has length 15 [2022-02-16 13:44:32,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:32,986 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 651 transitions. [2022-02-16 13:44:32,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 651 transitions. [2022-02-16 13:44:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:32,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:32,987 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:33,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:33,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-16 13:44:33,208 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1950903055, now seen corresponding path program 113 times [2022-02-16 13:44:33,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:33,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762977525] [2022-02-16 13:44:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:33,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:33,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:33,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762977525] [2022-02-16 13:44:33,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762977525] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:33,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013222971] [2022-02-16 13:44:33,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:33,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:33,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:33,262 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:33,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-16 13:44:33,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:44:33,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:33,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:33,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:33,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:33,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:33,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:33,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:33,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:33,518 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:33,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:33,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:33,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013222971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:33,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:33,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:33,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746445902] [2022-02-16 13:44:33,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:33,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:33,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:33,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:33,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:33,538 INFO L87 Difference]: Start difference. First operand 233 states and 651 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:33,686 INFO L93 Difference]: Finished difference Result 279 states and 745 transitions. [2022-02-16 13:44:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:44:33,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:33,687 INFO L225 Difference]: With dead ends: 279 [2022-02-16 13:44:33,687 INFO L226 Difference]: Without dead ends: 279 [2022-02-16 13:44:33,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:33,687 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:33,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 44 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 274 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-02-16 13:44:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-16 13:44:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 240. [2022-02-16 13:44:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.811715481171548) internal successors, (672), 239 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 672 transitions. [2022-02-16 13:44:33,691 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 672 transitions. Word has length 15 [2022-02-16 13:44:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:33,691 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 672 transitions. [2022-02-16 13:44:33,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 672 transitions. [2022-02-16 13:44:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:33,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:33,691 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:33,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:33,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:33,911 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash -396853931, now seen corresponding path program 114 times [2022-02-16 13:44:33,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:33,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385528314] [2022-02-16 13:44:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:33,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:33,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:33,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385528314] [2022-02-16 13:44:33,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385528314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:33,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038727159] [2022-02-16 13:44:33,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:33,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:33,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:33,964 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:33,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-16 13:44:33,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:44:33,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:33,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:34,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:34,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:44:34,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:34,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:44:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:34,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:34,175 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:34,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:34,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:34,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038727159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:34,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:34,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:34,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970468557] [2022-02-16 13:44:34,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:34,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:34,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:34,190 INFO L87 Difference]: Start difference. First operand 240 states and 672 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:34,318 INFO L93 Difference]: Finished difference Result 264 states and 718 transitions. [2022-02-16 13:44:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:44:34,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:34,319 INFO L225 Difference]: With dead ends: 264 [2022-02-16 13:44:34,319 INFO L226 Difference]: Without dead ends: 261 [2022-02-16 13:44:34,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:44:34,319 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:34,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 299 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-02-16 13:44:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-16 13:44:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2022-02-16 13:44:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8) internal successors, (672), 240 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 672 transitions. [2022-02-16 13:44:34,322 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 672 transitions. Word has length 15 [2022-02-16 13:44:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:34,322 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 672 transitions. [2022-02-16 13:44:34,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 672 transitions. [2022-02-16 13:44:34,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:34,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:34,323 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:34,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:34,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-02-16 13:44:34,523 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1711260717, now seen corresponding path program 115 times [2022-02-16 13:44:34,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:34,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414110153] [2022-02-16 13:44:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:34,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:34,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:34,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414110153] [2022-02-16 13:44:34,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414110153] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:34,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6910663] [2022-02-16 13:44:34,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:34,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:34,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:34,579 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:34,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-16 13:44:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:34,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:34,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:34,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:34,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:34,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:34,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:34,787 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:34,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:34,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:34,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6910663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:34,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:34,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:34,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861057800] [2022-02-16 13:44:34,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:34,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:34,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:34,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:34,799 INFO L87 Difference]: Start difference. First operand 241 states and 672 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:35,065 INFO L93 Difference]: Finished difference Result 298 states and 787 transitions. [2022-02-16 13:44:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:44:35,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:35,066 INFO L225 Difference]: With dead ends: 298 [2022-02-16 13:44:35,066 INFO L226 Difference]: Without dead ends: 298 [2022-02-16 13:44:35,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:44:35,066 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:35,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 289 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-02-16 13:44:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-16 13:44:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 243. [2022-02-16 13:44:35,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.809917355371901) internal successors, (680), 242 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 680 transitions. [2022-02-16 13:44:35,071 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 680 transitions. Word has length 15 [2022-02-16 13:44:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:35,071 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 680 transitions. [2022-02-16 13:44:35,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 680 transitions. [2022-02-16 13:44:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:35,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:35,072 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:35,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-02-16 13:44:35,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-02-16 13:44:35,289 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:35,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1664005871, now seen corresponding path program 116 times [2022-02-16 13:44:35,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:35,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145278396] [2022-02-16 13:44:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:35,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:35,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:35,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145278396] [2022-02-16 13:44:35,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145278396] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:35,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514000344] [2022-02-16 13:44:35,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:35,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:35,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:35,359 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:35,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-16 13:44:35,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:35,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:35,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:35,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:44:35,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:35,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:44:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:35,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:35,659 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:35,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:35,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:35,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514000344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:35,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:35,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:35,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375788041] [2022-02-16 13:44:35,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:35,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:35,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:35,682 INFO L87 Difference]: Start difference. First operand 243 states and 680 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:35,866 INFO L93 Difference]: Finished difference Result 266 states and 723 transitions. [2022-02-16 13:44:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:35,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:35,867 INFO L225 Difference]: With dead ends: 266 [2022-02-16 13:44:35,867 INFO L226 Difference]: Without dead ends: 262 [2022-02-16 13:44:35,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:44:35,867 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:35,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 325 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-02-16 13:44:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-16 13:44:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 243. [2022-02-16 13:44:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.8016528925619837) internal successors, (678), 242 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 678 transitions. [2022-02-16 13:44:35,870 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 678 transitions. Word has length 15 [2022-02-16 13:44:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:35,870 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 678 transitions. [2022-02-16 13:44:35,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 678 transitions. [2022-02-16 13:44:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:35,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:35,871 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:35,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:36,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-02-16 13:44:36,075 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1703530319, now seen corresponding path program 117 times [2022-02-16 13:44:36,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:36,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761167684] [2022-02-16 13:44:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:36,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:36,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:36,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761167684] [2022-02-16 13:44:36,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761167684] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:36,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749473188] [2022-02-16 13:44:36,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:36,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:36,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:36,177 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:36,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-16 13:44:36,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:44:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:36,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:36,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:36,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:36,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:36,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:36,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:36,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:36,496 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:36,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:36,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:36,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749473188] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:36,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:36,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:36,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449973009] [2022-02-16 13:44:36,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:36,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:36,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:36,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:36,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:36,517 INFO L87 Difference]: Start difference. First operand 243 states and 678 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:37,123 INFO L93 Difference]: Finished difference Result 375 states and 886 transitions. [2022-02-16 13:44:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:44:37,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:37,124 INFO L225 Difference]: With dead ends: 375 [2022-02-16 13:44:37,124 INFO L226 Difference]: Without dead ends: 375 [2022-02-16 13:44:37,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:44:37,124 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:37,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 66 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-02-16 13:44:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 242. [2022-02-16 13:44:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.809128630705394) internal successors, (677), 241 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 677 transitions. [2022-02-16 13:44:37,128 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 677 transitions. Word has length 15 [2022-02-16 13:44:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:37,128 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 677 transitions. [2022-02-16 13:44:37,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 677 transitions. [2022-02-16 13:44:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:37,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:37,128 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:37,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:37,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:37,329 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:37,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:37,329 INFO L85 PathProgramCache]: Analyzing trace with hash -901914091, now seen corresponding path program 118 times [2022-02-16 13:44:37,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:37,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039817536] [2022-02-16 13:44:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:37,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:37,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:37,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039817536] [2022-02-16 13:44:37,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039817536] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:37,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62915388] [2022-02-16 13:44:37,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:37,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:37,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:37,413 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:37,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-16 13:44:37,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:37,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:37,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:37,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:37,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:37,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:37,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:37,702 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:37,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:37,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:37,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62915388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:37,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:37,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:37,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60267862] [2022-02-16 13:44:37,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:37,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:37,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:37,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:37,722 INFO L87 Difference]: Start difference. First operand 242 states and 677 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:37,997 INFO L93 Difference]: Finished difference Result 295 states and 763 transitions. [2022-02-16 13:44:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:44:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:37,998 INFO L225 Difference]: With dead ends: 295 [2022-02-16 13:44:37,998 INFO L226 Difference]: Without dead ends: 292 [2022-02-16 13:44:37,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:44:37,998 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 64 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:37,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 34 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-16 13:44:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 246. [2022-02-16 13:44:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.8122448979591836) internal successors, (689), 245 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 689 transitions. [2022-02-16 13:44:38,002 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 689 transitions. Word has length 15 [2022-02-16 13:44:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:38,002 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 689 transitions. [2022-02-16 13:44:38,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 689 transitions. [2022-02-16 13:44:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:38,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:38,003 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:38,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:38,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:38,205 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:38,206 INFO L85 PathProgramCache]: Analyzing trace with hash 816429615, now seen corresponding path program 119 times [2022-02-16 13:44:38,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:38,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79184471] [2022-02-16 13:44:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:38,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:38,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:38,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79184471] [2022-02-16 13:44:38,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79184471] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:38,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955200084] [2022-02-16 13:44:38,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:38,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:38,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:38,294 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:38,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-16 13:44:38,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:44:38,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:38,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:38,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:38,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:38,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:38,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:38,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:38,571 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:38,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:38,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:38,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955200084] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:38,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:38,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:38,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774283424] [2022-02-16 13:44:38,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:38,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:38,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:38,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:38,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:38,595 INFO L87 Difference]: Start difference. First operand 246 states and 689 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:38,775 INFO L93 Difference]: Finished difference Result 292 states and 760 transitions. [2022-02-16 13:44:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:44:38,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:38,776 INFO L225 Difference]: With dead ends: 292 [2022-02-16 13:44:38,776 INFO L226 Difference]: Without dead ends: 292 [2022-02-16 13:44:38,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:44:38,776 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:38,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 82 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-16 13:44:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 242. [2022-02-16 13:44:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.804979253112033) internal successors, (676), 241 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:38,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 676 transitions. [2022-02-16 13:44:38,779 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 676 transitions. Word has length 15 [2022-02-16 13:44:38,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:38,780 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 676 transitions. [2022-02-16 13:44:38,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 676 transitions. [2022-02-16 13:44:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:38,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:38,780 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:38,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-02-16 13:44:38,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:38,981 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:38,981 INFO L85 PathProgramCache]: Analyzing trace with hash -638175337, now seen corresponding path program 120 times [2022-02-16 13:44:38,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:38,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800992553] [2022-02-16 13:44:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:38,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:39,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:39,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800992553] [2022-02-16 13:44:39,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800992553] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:39,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300206835] [2022-02-16 13:44:39,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:39,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:39,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:39,058 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:39,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-16 13:44:39,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:44:39,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:39,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:39,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:39,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:39,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:39,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:39,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:39,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:39,316 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:39,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:39,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:39,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300206835] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:39,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:39,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:39,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280615181] [2022-02-16 13:44:39,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:39,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:39,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:39,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:39,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:39,336 INFO L87 Difference]: Start difference. First operand 242 states and 676 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:39,561 INFO L93 Difference]: Finished difference Result 303 states and 791 transitions. [2022-02-16 13:44:39,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:39,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:39,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:39,561 INFO L225 Difference]: With dead ends: 303 [2022-02-16 13:44:39,562 INFO L226 Difference]: Without dead ends: 303 [2022-02-16 13:44:39,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:44:39,562 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:39,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 52 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 362 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-02-16 13:44:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-16 13:44:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 244. [2022-02-16 13:44:39,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.8189300411522633) internal successors, (685), 243 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 685 transitions. [2022-02-16 13:44:39,565 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 685 transitions. Word has length 15 [2022-02-16 13:44:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:39,565 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 685 transitions. [2022-02-16 13:44:39,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 685 transitions. [2022-02-16 13:44:39,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:39,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:39,565 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:39,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-02-16 13:44:39,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-02-16 13:44:39,775 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1557876045, now seen corresponding path program 121 times [2022-02-16 13:44:39,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:39,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378912024] [2022-02-16 13:44:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:39,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:39,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:39,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378912024] [2022-02-16 13:44:39,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378912024] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:39,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031759582] [2022-02-16 13:44:39,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:39,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:39,835 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:39,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-16 13:44:39,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:40,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:40,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:44:40,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:40,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:44:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:40,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:40,108 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:40,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:44:40,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:40,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031759582] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:40,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:40,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:40,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346363169] [2022-02-16 13:44:40,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:40,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:40,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:40,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:40,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:40,135 INFO L87 Difference]: Start difference. First operand 244 states and 685 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:40,355 INFO L93 Difference]: Finished difference Result 275 states and 737 transitions. [2022-02-16 13:44:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:44:40,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:40,356 INFO L225 Difference]: With dead ends: 275 [2022-02-16 13:44:40,356 INFO L226 Difference]: Without dead ends: 271 [2022-02-16 13:44:40,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:44:40,356 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:40,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 312 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-02-16 13:44:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-02-16 13:44:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 244. [2022-02-16 13:44:40,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.8065843621399176) internal successors, (682), 243 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 682 transitions. [2022-02-16 13:44:40,359 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 682 transitions. Word has length 15 [2022-02-16 13:44:40,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:40,360 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 682 transitions. [2022-02-16 13:44:40,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 682 transitions. [2022-02-16 13:44:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:40,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:40,360 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:40,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:40,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-16 13:44:40,576 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:40,577 INFO L85 PathProgramCache]: Analyzing trace with hash 977076247, now seen corresponding path program 122 times [2022-02-16 13:44:40,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:40,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937280470] [2022-02-16 13:44:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:40,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:40,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:40,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937280470] [2022-02-16 13:44:40,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937280470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:40,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799044612] [2022-02-16 13:44:40,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:40,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:40,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:40,629 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:40,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-16 13:44:40,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:40,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:40,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:40,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:40,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:40,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:40,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:40,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:40,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:40,836 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:40,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:40,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:40,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799044612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:40,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:40,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:40,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131235872] [2022-02-16 13:44:40,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:40,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:40,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:40,849 INFO L87 Difference]: Start difference. First operand 244 states and 682 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:41,290 INFO L93 Difference]: Finished difference Result 299 states and 774 transitions. [2022-02-16 13:44:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:44:41,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:41,291 INFO L225 Difference]: With dead ends: 299 [2022-02-16 13:44:41,291 INFO L226 Difference]: Without dead ends: 297 [2022-02-16 13:44:41,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:44:41,291 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:41,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 42 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-16 13:44:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 244. [2022-02-16 13:44:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.794238683127572) internal successors, (679), 243 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 679 transitions. [2022-02-16 13:44:41,294 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 679 transitions. Word has length 15 [2022-02-16 13:44:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:41,294 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 679 transitions. [2022-02-16 13:44:41,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 679 transitions. [2022-02-16 13:44:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:41,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:41,295 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:41,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:41,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-16 13:44:41,507 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:41,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2119849935, now seen corresponding path program 123 times [2022-02-16 13:44:41,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:41,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884423637] [2022-02-16 13:44:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:41,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:41,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:41,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884423637] [2022-02-16 13:44:41,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884423637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:41,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672531951] [2022-02-16 13:44:41,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:41,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:41,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:41,560 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:41,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-16 13:44:41,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:44:41,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:41,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:41,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:41,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:41,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:41,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:41,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:41,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:41,725 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:41,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:44:41,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:41,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672531951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:41,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:41,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:41,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343844965] [2022-02-16 13:44:41,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:41,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:41,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:41,742 INFO L87 Difference]: Start difference. First operand 244 states and 679 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:41,949 INFO L93 Difference]: Finished difference Result 339 states and 834 transitions. [2022-02-16 13:44:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:44:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:41,949 INFO L225 Difference]: With dead ends: 339 [2022-02-16 13:44:41,949 INFO L226 Difference]: Without dead ends: 339 [2022-02-16 13:44:41,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:44:41,950 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:41,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 60 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-16 13:44:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 250. [2022-02-16 13:44:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.8152610441767068) internal successors, (701), 249 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 701 transitions. [2022-02-16 13:44:41,953 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 701 transitions. Word has length 15 [2022-02-16 13:44:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:41,953 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 701 transitions. [2022-02-16 13:44:41,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 701 transitions. [2022-02-16 13:44:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:41,954 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:41,954 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:41,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:42,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-16 13:44:42,163 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1318233707, now seen corresponding path program 124 times [2022-02-16 13:44:42,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:42,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395864699] [2022-02-16 13:44:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:42,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:42,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:42,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395864699] [2022-02-16 13:44:42,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395864699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:42,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205511346] [2022-02-16 13:44:42,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:42,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:42,229 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:42,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-16 13:44:42,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:42,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:42,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:42,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:42,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:42,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:42,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:42,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:42,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:42,503 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:42,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:42,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:42,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205511346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:42,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:42,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:42,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184898679] [2022-02-16 13:44:42,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:42,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:42,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:42,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:42,526 INFO L87 Difference]: Start difference. First operand 250 states and 701 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:43,138 INFO L93 Difference]: Finished difference Result 351 states and 848 transitions. [2022-02-16 13:44:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 13:44:43,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:43,139 INFO L225 Difference]: With dead ends: 351 [2022-02-16 13:44:43,139 INFO L226 Difference]: Without dead ends: 347 [2022-02-16 13:44:43,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:44:43,140 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 75 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:43,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 90 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:44:43,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-16 13:44:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 256. [2022-02-16 13:44:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.8078431372549018) internal successors, (716), 255 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 716 transitions. [2022-02-16 13:44:43,143 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 716 transitions. Word has length 15 [2022-02-16 13:44:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:43,143 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 716 transitions. [2022-02-16 13:44:43,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 716 transitions. [2022-02-16 13:44:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:43,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:43,144 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:43,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:43,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-02-16 13:44:43,344 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash 400109999, now seen corresponding path program 125 times [2022-02-16 13:44:43,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:43,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496116981] [2022-02-16 13:44:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:43,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:43,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:43,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496116981] [2022-02-16 13:44:43,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496116981] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:43,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582558888] [2022-02-16 13:44:43,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:43,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:43,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:43,436 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:43,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-16 13:44:43,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:44:43,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:43,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:43,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:43,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:43,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:43,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:43,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:43,683 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:43,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:43,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:43,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582558888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:43,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:43,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:43,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822035068] [2022-02-16 13:44:43,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:43,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:43,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:43,704 INFO L87 Difference]: Start difference. First operand 256 states and 716 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:44,027 INFO L93 Difference]: Finished difference Result 334 states and 826 transitions. [2022-02-16 13:44:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:44:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:44,028 INFO L225 Difference]: With dead ends: 334 [2022-02-16 13:44:44,028 INFO L226 Difference]: Without dead ends: 334 [2022-02-16 13:44:44,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:44:44,028 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:44,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 78 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-16 13:44:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 250. [2022-02-16 13:44:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.783132530120482) internal successors, (693), 249 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 693 transitions. [2022-02-16 13:44:44,032 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 693 transitions. Word has length 15 [2022-02-16 13:44:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:44,032 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 693 transitions. [2022-02-16 13:44:44,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 693 transitions. [2022-02-16 13:44:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:44,033 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:44,033 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:44,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-02-16 13:44:44,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-02-16 13:44:44,247 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:44,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1310503309, now seen corresponding path program 126 times [2022-02-16 13:44:44,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:44,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577841259] [2022-02-16 13:44:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:44,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:44,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:44,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577841259] [2022-02-16 13:44:44,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577841259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:44,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698880350] [2022-02-16 13:44:44,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:44,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:44,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:44,325 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:44,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-16 13:44:44,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:44:44,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:44,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:44,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:44,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:44,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:44,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:44:44,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:44,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:44:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:44,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:44,580 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:44,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:44,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:44,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698880350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:44,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:44,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:44:44,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518398996] [2022-02-16 13:44:44,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:44,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:44,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:44,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:44,614 INFO L87 Difference]: Start difference. First operand 250 states and 693 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:44,875 INFO L93 Difference]: Finished difference Result 319 states and 801 transitions. [2022-02-16 13:44:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:44:44,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:44,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:44,876 INFO L225 Difference]: With dead ends: 319 [2022-02-16 13:44:44,876 INFO L226 Difference]: Without dead ends: 319 [2022-02-16 13:44:44,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:44:44,876 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:44,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 82 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-02-16 13:44:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 246. [2022-02-16 13:44:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.763265306122449) internal successors, (677), 245 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 677 transitions. [2022-02-16 13:44:44,879 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 677 transitions. Word has length 15 [2022-02-16 13:44:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:44,880 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 677 transitions. [2022-02-16 13:44:44,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 677 transitions. [2022-02-16 13:44:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:44,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:44,880 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:44,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:45,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:45,087 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1065104775, now seen corresponding path program 127 times [2022-02-16 13:44:45,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:45,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593546681] [2022-02-16 13:44:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:45,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:45,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:45,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593546681] [2022-02-16 13:44:45,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593546681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:45,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385797543] [2022-02-16 13:44:45,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:45,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:45,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:45,169 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:45,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-16 13:44:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:45,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:45,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:45,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:45,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:45,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:45,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:45,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:45,450 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:45,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:45,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:45,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385797543] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:45,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:45,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:45,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092144273] [2022-02-16 13:44:45,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:45,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:45,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:45,468 INFO L87 Difference]: Start difference. First operand 246 states and 677 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:45,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:45,629 INFO L93 Difference]: Finished difference Result 329 states and 829 transitions. [2022-02-16 13:44:45,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:44:45,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:45,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:45,630 INFO L225 Difference]: With dead ends: 329 [2022-02-16 13:44:45,630 INFO L226 Difference]: Without dead ends: 329 [2022-02-16 13:44:45,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:44:45,631 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:45,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 128 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 415 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-02-16 13:44:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-16 13:44:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 262. [2022-02-16 13:44:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.796934865900383) internal successors, (730), 261 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 730 transitions. [2022-02-16 13:44:45,634 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 730 transitions. Word has length 15 [2022-02-16 13:44:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:45,634 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 730 transitions. [2022-02-16 13:44:45,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 730 transitions. [2022-02-16 13:44:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:45,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:45,635 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:45,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-02-16 13:44:45,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:45,847 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash 663942559, now seen corresponding path program 128 times [2022-02-16 13:44:45,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:45,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17811785] [2022-02-16 13:44:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:45,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:45,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:45,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17811785] [2022-02-16 13:44:45,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17811785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:45,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174256894] [2022-02-16 13:44:45,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:45,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:45,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:45,912 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:45,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-16 13:44:45,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:45,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:45,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:45,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:46,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:46,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:46,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:46,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:46,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:46,142 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:46,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:46,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:46,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174256894] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:46,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:46,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:46,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851690388] [2022-02-16 13:44:46,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:46,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:46,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:46,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:46,156 INFO L87 Difference]: Start difference. First operand 262 states and 730 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:46,319 INFO L93 Difference]: Finished difference Result 341 states and 868 transitions. [2022-02-16 13:44:46,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:44:46,319 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:46,320 INFO L225 Difference]: With dead ends: 341 [2022-02-16 13:44:46,320 INFO L226 Difference]: Without dead ends: 341 [2022-02-16 13:44:46,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:44:46,320 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:46,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 106 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 323 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-02-16 13:44:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-02-16 13:44:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 270. [2022-02-16 13:44:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.8178438661710037) internal successors, (758), 269 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 758 transitions. [2022-02-16 13:44:46,324 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 758 transitions. Word has length 15 [2022-02-16 13:44:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:46,324 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 758 transitions. [2022-02-16 13:44:46,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:46,324 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 758 transitions. [2022-02-16 13:44:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:46,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:46,324 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:46,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:46,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:46,525 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash 488944349, now seen corresponding path program 129 times [2022-02-16 13:44:46,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:46,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467224733] [2022-02-16 13:44:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:46,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:46,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:46,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467224733] [2022-02-16 13:44:46,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467224733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:46,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579954164] [2022-02-16 13:44:46,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:46,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:46,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:46,606 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:46,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-16 13:44:46,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:44:46,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:46,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:46,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:46,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:44:46,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:46,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:44:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:46,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:46,909 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:46,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:46,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:46,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579954164] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:46,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:46,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:44:46,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556699684] [2022-02-16 13:44:46,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:46,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:44:46,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:44:46,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:44:46,932 INFO L87 Difference]: Start difference. First operand 270 states and 758 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:47,211 INFO L93 Difference]: Finished difference Result 319 states and 817 transitions. [2022-02-16 13:44:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:44:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:47,212 INFO L225 Difference]: With dead ends: 319 [2022-02-16 13:44:47,212 INFO L226 Difference]: Without dead ends: 313 [2022-02-16 13:44:47,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:44:47,212 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:47,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 368 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-02-16 13:44:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-16 13:44:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 273. [2022-02-16 13:44:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.7941176470588234) internal successors, (760), 272 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 760 transitions. [2022-02-16 13:44:47,216 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 760 transitions. Word has length 15 [2022-02-16 13:44:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:47,216 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 760 transitions. [2022-02-16 13:44:47,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 760 transitions. [2022-02-16 13:44:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:47,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:47,217 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:47,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:47,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:47,417 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash -825462437, now seen corresponding path program 130 times [2022-02-16 13:44:47,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:47,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547040672] [2022-02-16 13:44:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:47,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:47,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:47,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547040672] [2022-02-16 13:44:47,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547040672] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:47,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687634771] [2022-02-16 13:44:47,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:47,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:47,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:47,509 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:47,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-16 13:44:47,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:47,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:47,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:47,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:47,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:47,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:47,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:47,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:47,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:47,759 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:47,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:47,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:47,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687634771] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:47,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:47,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:47,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473701959] [2022-02-16 13:44:47,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:47,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:47,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:47,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:47,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:47,774 INFO L87 Difference]: Start difference. First operand 273 states and 760 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:48,233 INFO L93 Difference]: Finished difference Result 355 states and 889 transitions. [2022-02-16 13:44:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:44:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:48,234 INFO L225 Difference]: With dead ends: 355 [2022-02-16 13:44:48,234 INFO L226 Difference]: Without dead ends: 355 [2022-02-16 13:44:48,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:44:48,235 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:48,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 78 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 390 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-02-16 13:44:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-02-16 13:44:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 270. [2022-02-16 13:44:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.8104089219330857) internal successors, (756), 269 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 756 transitions. [2022-02-16 13:44:48,239 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 756 transitions. Word has length 15 [2022-02-16 13:44:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:48,239 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 756 transitions. [2022-02-16 13:44:48,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 756 transitions. [2022-02-16 13:44:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:48,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:48,239 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:48,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:48,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:48,453 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:48,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1745163145, now seen corresponding path program 131 times [2022-02-16 13:44:48,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:48,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946216952] [2022-02-16 13:44:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:48,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:48,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:48,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946216952] [2022-02-16 13:44:48,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946216952] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:48,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873598697] [2022-02-16 13:44:48,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:48,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:48,527 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:48,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-16 13:44:48,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:48,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:48,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:48,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:48,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:48,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:44:48,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:48,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:44:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:48,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:48,853 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:48,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:48,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:48,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873598697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:48,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:48,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:48,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528134686] [2022-02-16 13:44:48,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:48,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:48,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:48,876 INFO L87 Difference]: Start difference. First operand 270 states and 756 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:49,267 INFO L93 Difference]: Finished difference Result 311 states and 807 transitions. [2022-02-16 13:44:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:44:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:49,268 INFO L225 Difference]: With dead ends: 311 [2022-02-16 13:44:49,268 INFO L226 Difference]: Without dead ends: 307 [2022-02-16 13:44:49,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:44:49,268 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:49,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 72 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 453 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-02-16 13:44:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-16 13:44:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 271. [2022-02-16 13:44:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.803703703703704) internal successors, (757), 270 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 757 transitions. [2022-02-16 13:44:49,272 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 757 transitions. Word has length 15 [2022-02-16 13:44:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:49,272 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 757 transitions. [2022-02-16 13:44:49,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 757 transitions. [2022-02-16 13:44:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:49,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:49,273 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:49,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:49,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:49,473 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:49,474 INFO L85 PathProgramCache]: Analyzing trace with hash -817732039, now seen corresponding path program 132 times [2022-02-16 13:44:49,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:49,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222151005] [2022-02-16 13:44:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:49,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:49,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:49,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222151005] [2022-02-16 13:44:49,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222151005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:49,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805982309] [2022-02-16 13:44:49,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:49,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:49,560 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:49,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-16 13:44:49,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:44:49,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:49,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:49,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:49,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:49,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:49,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:49,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:49,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:49,854 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:49,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:49,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:49,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805982309] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:49,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:49,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:49,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505710276] [2022-02-16 13:44:49,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:49,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:49,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:49,872 INFO L87 Difference]: Start difference. First operand 271 states and 757 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:50,441 INFO L93 Difference]: Finished difference Result 368 states and 877 transitions. [2022-02-16 13:44:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:44:50,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:50,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:50,442 INFO L225 Difference]: With dead ends: 368 [2022-02-16 13:44:50,442 INFO L226 Difference]: Without dead ends: 367 [2022-02-16 13:44:50,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:44:50,442 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 115 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:50,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 84 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-16 13:44:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 259. [2022-02-16 13:44:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.7635658914728682) internal successors, (713), 258 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 713 transitions. [2022-02-16 13:44:50,446 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 713 transitions. Word has length 15 [2022-02-16 13:44:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:50,446 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 713 transitions. [2022-02-16 13:44:50,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 713 transitions. [2022-02-16 13:44:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:50,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:50,447 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:50,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:50,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-02-16 13:44:50,647 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:50,647 INFO L85 PathProgramCache]: Analyzing trace with hash -16115811, now seen corresponding path program 133 times [2022-02-16 13:44:50,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:50,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608697582] [2022-02-16 13:44:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:50,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:50,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:50,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608697582] [2022-02-16 13:44:50,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608697582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:50,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858109991] [2022-02-16 13:44:50,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:50,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:50,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:50,739 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:50,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-16 13:44:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:50,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:50,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:50,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:50,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:50,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:51,064 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:51,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:51,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:51,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858109991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:51,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:51,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:51,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732370464] [2022-02-16 13:44:51,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:51,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:51,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:51,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:51,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:51,090 INFO L87 Difference]: Start difference. First operand 259 states and 713 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:51,521 INFO L93 Difference]: Finished difference Result 316 states and 791 transitions. [2022-02-16 13:44:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:44:51,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:51,522 INFO L225 Difference]: With dead ends: 316 [2022-02-16 13:44:51,522 INFO L226 Difference]: Without dead ends: 312 [2022-02-16 13:44:51,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:44:51,522 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 75 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:51,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 72 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-16 13:44:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 263. [2022-02-16 13:44:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.767175572519084) internal successors, (725), 262 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 725 transitions. [2022-02-16 13:44:51,526 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 725 transitions. Word has length 15 [2022-02-16 13:44:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:51,526 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 725 transitions. [2022-02-16 13:44:51,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 725 transitions. [2022-02-16 13:44:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:51,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:51,527 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:51,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-02-16 13:44:51,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-02-16 13:44:51,741 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:51,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:51,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1702227895, now seen corresponding path program 134 times [2022-02-16 13:44:51,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:51,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397906283] [2022-02-16 13:44:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:51,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:51,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:51,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397906283] [2022-02-16 13:44:51,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397906283] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:51,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573147762] [2022-02-16 13:44:51,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:51,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:51,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:51,825 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:51,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-16 13:44:51,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:51,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:51,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:51,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:51,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:51,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:51,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:51,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:52,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:52,096 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:52,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:52,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:52,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573147762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:52,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:52,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:52,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036374768] [2022-02-16 13:44:52,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:52,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:52,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:52,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:52,127 INFO L87 Difference]: Start difference. First operand 263 states and 725 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:52,402 INFO L93 Difference]: Finished difference Result 306 states and 779 transitions. [2022-02-16 13:44:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:52,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:52,403 INFO L225 Difference]: With dead ends: 306 [2022-02-16 13:44:52,403 INFO L226 Difference]: Without dead ends: 306 [2022-02-16 13:44:52,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:44:52,404 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:52,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 102 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:52,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-02-16 13:44:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 256. [2022-02-16 13:44:52,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.7490196078431373) internal successors, (701), 255 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 701 transitions. [2022-02-16 13:44:52,408 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 701 transitions. Word has length 15 [2022-02-16 13:44:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:52,408 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 701 transitions. [2022-02-16 13:44:52,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 701 transitions. [2022-02-16 13:44:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:52,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:52,409 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:52,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:52,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-16 13:44:52,626 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:52,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:52,627 INFO L85 PathProgramCache]: Analyzing trace with hash -846468645, now seen corresponding path program 135 times [2022-02-16 13:44:52,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:52,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46121864] [2022-02-16 13:44:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:52,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:52,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:52,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46121864] [2022-02-16 13:44:52,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46121864] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:52,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354557945] [2022-02-16 13:44:52,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:52,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:52,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:52,685 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:52,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-16 13:44:52,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:44:52,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:52,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:52,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:52,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:44:52,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:52,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:44:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:52,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:52,903 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:52,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:52,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:52,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354557945] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:52,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:52,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:52,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229392629] [2022-02-16 13:44:52,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:52,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:52,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:52,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:52,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:52,920 INFO L87 Difference]: Start difference. First operand 256 states and 701 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:53,088 INFO L93 Difference]: Finished difference Result 328 states and 840 transitions. [2022-02-16 13:44:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:44:53,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:53,089 INFO L225 Difference]: With dead ends: 328 [2022-02-16 13:44:53,089 INFO L226 Difference]: Without dead ends: 328 [2022-02-16 13:44:53,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:53,090 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:53,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 66 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 371 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-02-16 13:44:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-16 13:44:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 265. [2022-02-16 13:44:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.787878787878788) internal successors, (736), 264 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 736 transitions. [2022-02-16 13:44:53,094 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 736 transitions. Word has length 15 [2022-02-16 13:44:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:53,094 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 736 transitions. [2022-02-16 13:44:53,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 736 transitions. [2022-02-16 13:44:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:53,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:53,095 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:53,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:53,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-02-16 13:44:53,311 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:53,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1766169353, now seen corresponding path program 136 times [2022-02-16 13:44:53,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:53,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42371952] [2022-02-16 13:44:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:53,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:53,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:53,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42371952] [2022-02-16 13:44:53,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42371952] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:53,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013770253] [2022-02-16 13:44:53,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:53,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:53,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:53,376 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:53,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-16 13:44:53,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:53,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:53,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:53,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:53,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:53,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:44:53,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:53,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:44:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:53,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:53,644 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:53,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:44:53,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:53,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013770253] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:53,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:53,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:53,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28420563] [2022-02-16 13:44:53,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:53,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:53,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:53,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:53,669 INFO L87 Difference]: Start difference. First operand 265 states and 736 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:53,931 INFO L93 Difference]: Finished difference Result 302 states and 784 transitions. [2022-02-16 13:44:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:44:53,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:53,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:53,932 INFO L225 Difference]: With dead ends: 302 [2022-02-16 13:44:53,932 INFO L226 Difference]: Without dead ends: 298 [2022-02-16 13:44:53,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:44:53,932 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:53,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 54 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-02-16 13:44:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-16 13:44:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 265. [2022-02-16 13:44:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.7803030303030303) internal successors, (734), 264 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 734 transitions. [2022-02-16 13:44:53,936 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 734 transitions. Word has length 15 [2022-02-16 13:44:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:53,936 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 734 transitions. [2022-02-16 13:44:53,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 734 transitions. [2022-02-16 13:44:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:53,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:53,936 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:53,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-02-16 13:44:54,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:54,137 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:54,137 INFO L85 PathProgramCache]: Analyzing trace with hash -838738247, now seen corresponding path program 137 times [2022-02-16 13:44:54,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:54,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047592046] [2022-02-16 13:44:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:54,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:54,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:54,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047592046] [2022-02-16 13:44:54,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047592046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:54,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188982827] [2022-02-16 13:44:54,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:54,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:54,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:54,208 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:54,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-16 13:44:54,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:44:54,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:54,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:54,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:54,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:54,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:54,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:54,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:54,456 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:54,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:44:54,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:44:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:54,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188982827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:54,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:54,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:54,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125192887] [2022-02-16 13:44:54,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:54,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:54,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:54,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:54,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:54,476 INFO L87 Difference]: Start difference. First operand 265 states and 734 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:54,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:54,728 INFO L93 Difference]: Finished difference Result 364 states and 887 transitions. [2022-02-16 13:44:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:44:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:54,729 INFO L225 Difference]: With dead ends: 364 [2022-02-16 13:44:54,729 INFO L226 Difference]: Without dead ends: 363 [2022-02-16 13:44:54,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:44:54,729 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 81 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:54,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 54 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:54,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-02-16 13:44:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 267. [2022-02-16 13:44:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.781954887218045) internal successors, (740), 266 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 740 transitions. [2022-02-16 13:44:54,733 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 740 transitions. Word has length 15 [2022-02-16 13:44:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:54,733 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 740 transitions. [2022-02-16 13:44:54,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 740 transitions. [2022-02-16 13:44:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:54,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:54,733 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:54,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:54,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:54,943 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:54,944 INFO L85 PathProgramCache]: Analyzing trace with hash -37122019, now seen corresponding path program 138 times [2022-02-16 13:44:54,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:54,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312371796] [2022-02-16 13:44:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:54,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:55,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:55,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312371796] [2022-02-16 13:44:55,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312371796] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:55,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155642883] [2022-02-16 13:44:55,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:44:55,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:55,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:55,021 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:55,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-16 13:44:55,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:44:55,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:55,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:55,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:55,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:55,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:55,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:55,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:55,282 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:55,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:44:55,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:55,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155642883] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:55,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:55,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:55,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227827002] [2022-02-16 13:44:55,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:55,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:55,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:55,309 INFO L87 Difference]: Start difference. First operand 267 states and 740 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:55,656 INFO L93 Difference]: Finished difference Result 330 states and 821 transitions. [2022-02-16 13:44:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:44:55,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:55,657 INFO L225 Difference]: With dead ends: 330 [2022-02-16 13:44:55,657 INFO L226 Difference]: Without dead ends: 327 [2022-02-16 13:44:55,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:44:55,657 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 87 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:55,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 50 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-16 13:44:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 269. [2022-02-16 13:44:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.7761194029850746) internal successors, (744), 268 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 744 transitions. [2022-02-16 13:44:55,661 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 744 transitions. Word has length 15 [2022-02-16 13:44:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:55,661 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 744 transitions. [2022-02-16 13:44:55,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 744 transitions. [2022-02-16 13:44:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:55,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:55,661 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:55,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:55,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:55,878 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1681221687, now seen corresponding path program 139 times [2022-02-16 13:44:55,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:55,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356920190] [2022-02-16 13:44:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:55,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:55,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:55,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356920190] [2022-02-16 13:44:55,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356920190] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:55,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723813521] [2022-02-16 13:44:55,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:55,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:55,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:55,957 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:55,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-16 13:44:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:55,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:55,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:56,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:56,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:56,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:56,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:56,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:56,186 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:56,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:44:56,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:56,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723813521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:56,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:56,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:56,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910494063] [2022-02-16 13:44:56,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:56,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:56,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:56,205 INFO L87 Difference]: Start difference. First operand 269 states and 744 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:56,422 INFO L93 Difference]: Finished difference Result 316 states and 804 transitions. [2022-02-16 13:44:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:56,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:56,423 INFO L225 Difference]: With dead ends: 316 [2022-02-16 13:44:56,423 INFO L226 Difference]: Without dead ends: 316 [2022-02-16 13:44:56,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:44:56,423 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:56,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 64 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-16 13:44:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 262. [2022-02-16 13:44:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7471264367816093) internal successors, (717), 261 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 717 transitions. [2022-02-16 13:44:56,427 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 717 transitions. Word has length 15 [2022-02-16 13:44:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:56,427 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 717 transitions. [2022-02-16 13:44:56,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:56,427 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 717 transitions. [2022-02-16 13:44:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:56,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:56,427 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:56,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:56,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:56,639 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:56,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:56,640 INFO L85 PathProgramCache]: Analyzing trace with hash -720622057, now seen corresponding path program 140 times [2022-02-16 13:44:56,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:56,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047762138] [2022-02-16 13:44:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:56,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:44:56,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:56,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047762138] [2022-02-16 13:44:56,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047762138] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:56,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691472703] [2022-02-16 13:44:56,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:56,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:56,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:56,712 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:56,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-16 13:44:56,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:56,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:56,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:56,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:56,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:56,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:56,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:56,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:56,916 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:56,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:44:56,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:44:56,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691472703] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:56,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:56,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:56,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386952887] [2022-02-16 13:44:56,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:56,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:56,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:56,933 INFO L87 Difference]: Start difference. First operand 262 states and 717 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:57,242 INFO L93 Difference]: Finished difference Result 311 states and 789 transitions. [2022-02-16 13:44:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:44:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:57,243 INFO L225 Difference]: With dead ends: 311 [2022-02-16 13:44:57,243 INFO L226 Difference]: Without dead ends: 309 [2022-02-16 13:44:57,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:44:57,243 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 55 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:57,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 38 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-16 13:44:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 262. [2022-02-16 13:44:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.739463601532567) internal successors, (715), 261 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 715 transitions. [2022-02-16 13:44:57,247 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 715 transitions. Word has length 15 [2022-02-16 13:44:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:57,248 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 715 transitions. [2022-02-16 13:44:57,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 715 transitions. [2022-02-16 13:44:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:57,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:57,248 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:57,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:57,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:57,464 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1008425277, now seen corresponding path program 141 times [2022-02-16 13:44:57,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:57,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380637154] [2022-02-16 13:44:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:57,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:44:57,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:57,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380637154] [2022-02-16 13:44:57,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380637154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:57,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889069612] [2022-02-16 13:44:57,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:44:57,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:57,525 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:57,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-16 13:44:57,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:44:57,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:57,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:57,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:57,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:44:57,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:57,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:44:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:57,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:57,769 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:44:57,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:44:57,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:44:57,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889069612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:57,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:57,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-16 13:44:57,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689667785] [2022-02-16 13:44:57,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:57,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:44:57,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:57,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:44:57,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:44:57,801 INFO L87 Difference]: Start difference. First operand 262 states and 715 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:58,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:58,091 INFO L93 Difference]: Finished difference Result 280 states and 740 transitions. [2022-02-16 13:44:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:44:58,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:58,091 INFO L225 Difference]: With dead ends: 280 [2022-02-16 13:44:58,092 INFO L226 Difference]: Without dead ends: 276 [2022-02-16 13:44:58,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:44:58,092 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:58,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 34 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-16 13:44:58,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2022-02-16 13:44:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.731800766283525) internal successors, (713), 261 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:58,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 713 transitions. [2022-02-16 13:44:58,095 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 713 transitions. Word has length 15 [2022-02-16 13:44:58,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:58,095 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 713 transitions. [2022-02-16 13:44:58,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 713 transitions. [2022-02-16 13:44:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:58,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:58,095 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:58,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-02-16 13:44:58,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:58,296 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1255057863, now seen corresponding path program 142 times [2022-02-16 13:44:58,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:58,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778689119] [2022-02-16 13:44:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:58,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:58,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:58,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778689119] [2022-02-16 13:44:58,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778689119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:58,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210211632] [2022-02-16 13:44:58,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:44:58,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:58,384 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:58,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-16 13:44:58,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:44:58,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:58,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:58,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:58,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:58,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:58,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:58,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:58,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:58,632 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:58,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:44:58,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:44:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:58,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210211632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:58,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:58,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:58,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66096817] [2022-02-16 13:44:58,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:58,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:58,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:58,651 INFO L87 Difference]: Start difference. First operand 262 states and 713 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:58,887 INFO L93 Difference]: Finished difference Result 335 states and 836 transitions. [2022-02-16 13:44:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:44:58,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:44:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:58,888 INFO L225 Difference]: With dead ends: 335 [2022-02-16 13:44:58,888 INFO L226 Difference]: Without dead ends: 335 [2022-02-16 13:44:58,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:44:58,888 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:58,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 46 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:44:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-16 13:44:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 270. [2022-02-16 13:44:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.7620817843866172) internal successors, (743), 269 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 743 transitions. [2022-02-16 13:44:58,892 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 743 transitions. Word has length 15 [2022-02-16 13:44:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:58,892 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 743 transitions. [2022-02-16 13:44:58,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 743 transitions. [2022-02-16 13:44:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:44:58,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:58,892 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:58,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-02-16 13:44:59,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-02-16 13:44:59,109 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash -453441635, now seen corresponding path program 143 times [2022-02-16 13:44:59,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:59,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174122830] [2022-02-16 13:44:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:59,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:59,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:59,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174122830] [2022-02-16 13:44:59,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174122830] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:59,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189408779] [2022-02-16 13:44:59,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:44:59,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:59,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:59,177 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:59,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-16 13:44:59,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:44:59,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:59,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:44:59,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:59,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:59,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:44:59,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:44:59,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:44:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:59,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:59,435 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:44:59,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:44:59,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:44:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:59,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189408779] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:59,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:59,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:44:59,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134661516] [2022-02-16 13:44:59,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:59,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:44:59,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:59,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:44:59,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:44:59,451 INFO L87 Difference]: Start difference. First operand 270 states and 743 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:00,116 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2022-02-16 13:45:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:45:00,116 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:45:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:00,116 INFO L225 Difference]: With dead ends: 357 [2022-02-16 13:45:00,116 INFO L226 Difference]: Without dead ends: 351 [2022-02-16 13:45:00,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:45:00,117 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:00,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 56 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:45:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-16 13:45:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 282. [2022-02-16 13:45:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.772241992882562) internal successors, (779), 281 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 779 transitions. [2022-02-16 13:45:00,121 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 779 transitions. Word has length 15 [2022-02-16 13:45:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:00,121 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 779 transitions. [2022-02-16 13:45:00,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 779 transitions. [2022-02-16 13:45:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:45:00,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:00,121 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:00,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:00,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-02-16 13:45:00,339 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:00,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:00,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1264902071, now seen corresponding path program 144 times [2022-02-16 13:45:00,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:00,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976563012] [2022-02-16 13:45:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:00,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:00,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:00,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976563012] [2022-02-16 13:45:00,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976563012] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:00,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480562201] [2022-02-16 13:45:00,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:45:00,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:00,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:00,421 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:00,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-16 13:45:00,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:45:00,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:00,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:45:00,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:00,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:00,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:45:00,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:00,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:45:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:00,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:00,681 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:45:00,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:45:00,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:45:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:00,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480562201] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:00,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:00,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:45:00,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052084033] [2022-02-16 13:45:00,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:00,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:45:00,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:00,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:45:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:45:00,697 INFO L87 Difference]: Start difference. First operand 282 states and 779 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:01,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:01,202 INFO L93 Difference]: Finished difference Result 347 states and 860 transitions. [2022-02-16 13:45:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:45:01,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:45:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:01,203 INFO L225 Difference]: With dead ends: 347 [2022-02-16 13:45:01,203 INFO L226 Difference]: Without dead ends: 346 [2022-02-16 13:45:01,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:45:01,203 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 58 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:01,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 28 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:45:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-16 13:45:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 268. [2022-02-16 13:45:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.7228464419475658) internal successors, (727), 267 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 727 transitions. [2022-02-16 13:45:01,207 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 727 transitions. Word has length 15 [2022-02-16 13:45:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:01,207 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 727 transitions. [2022-02-16 13:45:01,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:01,207 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 727 transitions. [2022-02-16 13:45:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:45:01,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:01,207 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:01,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:01,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-02-16 13:45:01,408 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash -445711237, now seen corresponding path program 145 times [2022-02-16 13:45:01,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:01,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074854640] [2022-02-16 13:45:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:01,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:01,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:01,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074854640] [2022-02-16 13:45:01,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074854640] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:01,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921525075] [2022-02-16 13:45:01,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:45:01,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:01,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:01,493 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:01,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-16 13:45:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:01,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:45:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:01,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:01,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:45:01,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:01,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:45:01,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:01,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:45:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:01,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:01,736 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:45:01,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:45:01,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:45:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:01,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921525075] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:01,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:01,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:45:01,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165219971] [2022-02-16 13:45:01,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:01,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:45:01,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:01,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:45:01,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:45:01,749 INFO L87 Difference]: Start difference. First operand 268 states and 727 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:02,199 INFO L93 Difference]: Finished difference Result 312 states and 805 transitions. [2022-02-16 13:45:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:45:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:45:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:02,200 INFO L225 Difference]: With dead ends: 312 [2022-02-16 13:45:02,200 INFO L226 Difference]: Without dead ends: 312 [2022-02-16 13:45:02,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:45:02,201 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:02,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 24 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:45:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-16 13:45:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 262. [2022-02-16 13:45:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7088122605363987) internal successors, (707), 261 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 707 transitions. [2022-02-16 13:45:02,204 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 707 transitions. Word has length 15 [2022-02-16 13:45:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:02,204 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 707 transitions. [2022-02-16 13:45:02,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 707 transitions. [2022-02-16 13:45:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:45:02,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:02,204 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:02,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:02,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-16 13:45:02,421 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:02,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1935116233, now seen corresponding path program 146 times [2022-02-16 13:45:02,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:02,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841683737] [2022-02-16 13:45:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:02,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:02,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:02,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841683737] [2022-02-16 13:45:02,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841683737] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:02,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668913740] [2022-02-16 13:45:02,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:45:02,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:02,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:02,472 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:02,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-16 13:45:02,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:45:02,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:45:02,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:02,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:02,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:45:02,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:02,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:45:02,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:02,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:45:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:02,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:02,655 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:45:02,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:45:02,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:45:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:02,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668913740] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:02,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:02,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:45:02,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095012228] [2022-02-16 13:45:02,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:02,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:45:02,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:45:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:45:02,666 INFO L87 Difference]: Start difference. First operand 262 states and 707 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:02,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:02,798 INFO L93 Difference]: Finished difference Result 291 states and 764 transitions. [2022-02-16 13:45:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:45:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:45:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:02,799 INFO L225 Difference]: With dead ends: 291 [2022-02-16 13:45:02,799 INFO L226 Difference]: Without dead ends: 291 [2022-02-16 13:45:02,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:45:02,799 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:02,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:45:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-16 13:45:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 263. [2022-02-16 13:45:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7099236641221376) internal successors, (710), 262 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 710 transitions. [2022-02-16 13:45:02,802 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 710 transitions. Word has length 15 [2022-02-16 13:45:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:02,802 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 710 transitions. [2022-02-16 13:45:02,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 710 transitions. [2022-02-16 13:45:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:02,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:02,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:02,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:03,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:03,016 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2026434779, now seen corresponding path program 147 times [2022-02-16 13:45:03,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:03,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555768309] [2022-02-16 13:45:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:03,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:03,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:03,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555768309] [2022-02-16 13:45:03,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555768309] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:03,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968443623] [2022-02-16 13:45:03,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:45:03,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:03,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:03,540 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:03,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-16 13:45:03,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:45:03,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:03,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-16 13:45:03,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:04,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:04,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:04,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:04,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 89 [2022-02-16 13:45:04,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:04,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 61 [2022-02-16 13:45:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:04,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:05,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:05,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:05,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:05,995 INFO L353 Elim1Store]: treesize reduction 46, result has 49.5 percent of original size [2022-02-16 13:45:05,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 250 treesize of output 238 [2022-02-16 13:45:06,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:06,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:06,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:06,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:06,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 248 [2022-02-16 13:45:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:06,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968443623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:06,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:06,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-16 13:45:06,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440450485] [2022-02-16 13:45:06,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:06,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 13:45:06,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:06,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 13:45:06,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:45:06,552 INFO L87 Difference]: Start difference. First operand 263 states and 710 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:08,931 INFO L93 Difference]: Finished difference Result 430 states and 1095 transitions. [2022-02-16 13:45:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:45:08,931 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:08,932 INFO L225 Difference]: With dead ends: 430 [2022-02-16 13:45:08,932 INFO L226 Difference]: Without dead ends: 421 [2022-02-16 13:45:08,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:45:08,932 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:08,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 39 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 861 Invalid, 0 Unknown, 156 Unchecked, 0.5s Time] [2022-02-16 13:45:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-02-16 13:45:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 268. [2022-02-16 13:45:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.700374531835206) internal successors, (721), 267 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 721 transitions. [2022-02-16 13:45:08,936 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 721 transitions. Word has length 16 [2022-02-16 13:45:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:08,936 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 721 transitions. [2022-02-16 13:45:08,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 721 transitions. [2022-02-16 13:45:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:08,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:08,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:08,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:09,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-02-16 13:45:09,153 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1098862525, now seen corresponding path program 148 times [2022-02-16 13:45:09,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:09,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826093304] [2022-02-16 13:45:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:09,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:09,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:09,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826093304] [2022-02-16 13:45:09,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826093304] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:09,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330238966] [2022-02-16 13:45:09,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:45:09,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:09,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:09,332 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:09,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-16 13:45:09,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:45:09,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:09,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:09,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:09,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:09,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:09,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:09,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:45:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:09,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:45:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:09,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:11,053 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:11,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 235 treesize of output 223 [2022-02-16 13:45:11,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:11,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:11,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:11,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:11,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 199 treesize of output 233 [2022-02-16 13:45:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:11,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330238966] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:11,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:11,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:45:11,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296261260] [2022-02-16 13:45:11,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:11,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:45:11,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:45:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:45:11,438 INFO L87 Difference]: Start difference. First operand 268 states and 721 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:12,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:12,656 INFO L93 Difference]: Finished difference Result 389 states and 974 transitions. [2022-02-16 13:45:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:45:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:12,657 INFO L225 Difference]: With dead ends: 389 [2022-02-16 13:45:12,657 INFO L226 Difference]: Without dead ends: 384 [2022-02-16 13:45:12,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 13:45:12,658 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 73 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:12,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 56 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:45:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-02-16 13:45:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 269. [2022-02-16 13:45:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.720149253731343) internal successors, (729), 268 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 729 transitions. [2022-02-16 13:45:12,661 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 729 transitions. Word has length 16 [2022-02-16 13:45:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:12,661 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 729 transitions. [2022-02-16 13:45:12,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 729 transitions. [2022-02-16 13:45:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:12,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:12,662 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:12,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:12,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:12,871 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1091132127, now seen corresponding path program 149 times [2022-02-16 13:45:12,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:12,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316244946] [2022-02-16 13:45:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:12,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:13,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:13,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316244946] [2022-02-16 13:45:13,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316244946] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:13,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210856226] [2022-02-16 13:45:13,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:45:13,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:13,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:13,061 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:13,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-16 13:45:13,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:45:13,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:13,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:13,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:13,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:13,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:13,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:45:13,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:13,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:45:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:13,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:14,763 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:14,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-02-16 13:45:14,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:14,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:14,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:14,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:14,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-02-16 13:45:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:15,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210856226] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:15,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:15,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:45:15,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698561591] [2022-02-16 13:45:15,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:15,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:45:15,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:45:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:45:15,159 INFO L87 Difference]: Start difference. First operand 269 states and 729 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:15,984 INFO L93 Difference]: Finished difference Result 358 states and 910 transitions. [2022-02-16 13:45:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:45:15,984 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:15,985 INFO L225 Difference]: With dead ends: 358 [2022-02-16 13:45:15,985 INFO L226 Difference]: Without dead ends: 353 [2022-02-16 13:45:15,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:45:15,986 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:15,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 43 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 585 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-02-16 13:45:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-16 13:45:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 270. [2022-02-16 13:45:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.7286245353159853) internal successors, (734), 269 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 734 transitions. [2022-02-16 13:45:15,990 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 734 transitions. Word has length 16 [2022-02-16 13:45:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:15,990 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 734 transitions. [2022-02-16 13:45:15,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 734 transitions. [2022-02-16 13:45:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:15,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:15,991 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:16,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:16,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:16,209 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:16,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1714430173, now seen corresponding path program 150 times [2022-02-16 13:45:16,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:16,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921508599] [2022-02-16 13:45:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:16,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:16,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:16,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921508599] [2022-02-16 13:45:16,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921508599] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:16,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776737164] [2022-02-16 13:45:16,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:45:16,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:16,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:16,693 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:16,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-16 13:45:16,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:45:16,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:16,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:16,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:17,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:17,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:17,296 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:45:17,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 79 [2022-02-16 13:45:17,302 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:45:17,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:45:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:17,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:18,407 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:18,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 253 treesize of output 245 [2022-02-16 13:45:18,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:18,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:18,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:18,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:18,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 221 treesize of output 259 [2022-02-16 13:45:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:18,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776737164] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:18,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:18,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-16 13:45:18,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988095389] [2022-02-16 13:45:18,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:18,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:45:18,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:18,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:45:18,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:45:18,742 INFO L87 Difference]: Start difference. First operand 270 states and 734 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:20,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:20,995 INFO L93 Difference]: Finished difference Result 352 states and 909 transitions. [2022-02-16 13:45:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:45:20,995 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:20,996 INFO L225 Difference]: With dead ends: 352 [2022-02-16 13:45:20,996 INFO L226 Difference]: Without dead ends: 340 [2022-02-16 13:45:20,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:45:20,997 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:20,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 692 Invalid, 0 Unknown, 100 Unchecked, 0.5s Time] [2022-02-16 13:45:20,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-16 13:45:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 274. [2022-02-16 13:45:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.728937728937729) internal successors, (745), 273 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 745 transitions. [2022-02-16 13:45:21,000 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 745 transitions. Word has length 16 [2022-02-16 13:45:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:21,000 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 745 transitions. [2022-02-16 13:45:21,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 745 transitions. [2022-02-16 13:45:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:21,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:21,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:21,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:21,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:21,211 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:21,212 INFO L85 PathProgramCache]: Analyzing trace with hash 756031397, now seen corresponding path program 151 times [2022-02-16 13:45:21,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:21,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579037236] [2022-02-16 13:45:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:21,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:21,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:21,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579037236] [2022-02-16 13:45:21,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579037236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:21,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22593649] [2022-02-16 13:45:21,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:45:21,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:21,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:21,481 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:21,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-16 13:45:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:21,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:21,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:21,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:21,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:21,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:45:21,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:21,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:45:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:21,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:22,739 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:22,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 252 treesize of output 244 [2022-02-16 13:45:22,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:22,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:22,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:22,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:22,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 258 [2022-02-16 13:45:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:23,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22593649] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:23,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:23,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 13:45:23,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537827939] [2022-02-16 13:45:23,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:23,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:45:23,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:23,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:45:23,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:45:23,017 INFO L87 Difference]: Start difference. First operand 274 states and 745 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:23,861 INFO L93 Difference]: Finished difference Result 359 states and 922 transitions. [2022-02-16 13:45:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:45:23,862 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:23,862 INFO L225 Difference]: With dead ends: 359 [2022-02-16 13:45:23,863 INFO L226 Difference]: Without dead ends: 352 [2022-02-16 13:45:23,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:45:23,863 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:23,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 459 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-02-16 13:45:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-16 13:45:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 274. [2022-02-16 13:45:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.728937728937729) internal successors, (745), 273 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 745 transitions. [2022-02-16 13:45:23,868 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 745 transitions. Word has length 16 [2022-02-16 13:45:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:23,868 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 745 transitions. [2022-02-16 13:45:23,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 745 transitions. [2022-02-16 13:45:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:23,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:23,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:23,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:24,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:24,085 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1507451743, now seen corresponding path program 152 times [2022-02-16 13:45:24,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:24,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889394450] [2022-02-16 13:45:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:24,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:24,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:24,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889394450] [2022-02-16 13:45:24,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889394450] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:24,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937003032] [2022-02-16 13:45:24,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:45:24,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:24,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:24,291 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:24,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-16 13:45:24,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:45:24,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:24,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:24,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:24,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:24,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:24,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:24,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:24,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:24,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:24,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:45:24,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:24,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:45:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:24,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:25,776 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:25,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-02-16 13:45:25,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:25,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:25,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:25,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:25,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-02-16 13:45:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:26,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937003032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:26,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:26,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-16 13:45:26,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631076398] [2022-02-16 13:45:26,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:26,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:45:26,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:26,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:45:26,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:45:26,422 INFO L87 Difference]: Start difference. First operand 274 states and 745 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:27,413 INFO L93 Difference]: Finished difference Result 371 states and 945 transitions. [2022-02-16 13:45:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:45:27,413 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:27,414 INFO L225 Difference]: With dead ends: 371 [2022-02-16 13:45:27,414 INFO L226 Difference]: Without dead ends: 365 [2022-02-16 13:45:27,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:45:27,414 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:27,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 49 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 672 Invalid, 0 Unknown, 200 Unchecked, 0.4s Time] [2022-02-16 13:45:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-16 13:45:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 281. [2022-02-16 13:45:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.732142857142857) internal successors, (765), 280 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 765 transitions. [2022-02-16 13:45:27,418 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 765 transitions. Word has length 16 [2022-02-16 13:45:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:27,418 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 765 transitions. [2022-02-16 13:45:27,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 765 transitions. [2022-02-16 13:45:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:27,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:27,418 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:27,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:27,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:27,619 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2107457183, now seen corresponding path program 153 times [2022-02-16 13:45:27,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:27,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970441093] [2022-02-16 13:45:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:27,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:27,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:27,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970441093] [2022-02-16 13:45:27,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970441093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:27,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217746343] [2022-02-16 13:45:27,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:45:27,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:27,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:27,731 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:27,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-16 13:45:27,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:45:27,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:27,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 13:45:27,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:27,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:27,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:45:27,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:27,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:45:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:27,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:28,103 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:45:28,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:45:28,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:45:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:28,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217746343] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:28,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:28,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 13:45:28,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090344420] [2022-02-16 13:45:28,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:28,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:45:28,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:28,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:45:28,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:45:28,115 INFO L87 Difference]: Start difference. First operand 281 states and 765 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:28,408 INFO L93 Difference]: Finished difference Result 361 states and 944 transitions. [2022-02-16 13:45:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:45:28,409 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:28,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:28,409 INFO L225 Difference]: With dead ends: 361 [2022-02-16 13:45:28,409 INFO L226 Difference]: Without dead ends: 361 [2022-02-16 13:45:28,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:45:28,410 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:28,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 336 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-02-16 13:45:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-16 13:45:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 282. [2022-02-16 13:45:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.7330960854092528) internal successors, (768), 281 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 768 transitions. [2022-02-16 13:45:28,414 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 768 transitions. Word has length 16 [2022-02-16 13:45:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:28,414 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 768 transitions. [2022-02-16 13:45:28,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 768 transitions. [2022-02-16 13:45:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:28,415 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:28,415 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:28,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:28,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-02-16 13:45:28,623 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1149058407, now seen corresponding path program 154 times [2022-02-16 13:45:28,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:28,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890123895] [2022-02-16 13:45:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:28,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:28,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:28,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890123895] [2022-02-16 13:45:28,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890123895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:28,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311221951] [2022-02-16 13:45:28,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:45:28,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:28,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:28,733 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:28,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-16 13:45:28,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:45:28,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:28,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 13:45:28,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:28,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:28,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:45:28,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:28,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:45:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:28,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:29,040 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:45:29,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:45:29,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:45:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:29,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311221951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:29,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:29,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 13:45:29,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919297897] [2022-02-16 13:45:29,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:29,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:45:29,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:29,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:45:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:45:29,078 INFO L87 Difference]: Start difference. First operand 282 states and 768 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:29,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:29,359 INFO L93 Difference]: Finished difference Result 362 states and 939 transitions. [2022-02-16 13:45:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:45:29,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:29,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:29,360 INFO L225 Difference]: With dead ends: 362 [2022-02-16 13:45:29,360 INFO L226 Difference]: Without dead ends: 362 [2022-02-16 13:45:29,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:45:29,361 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:29,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 447 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-02-16 13:45:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-16 13:45:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 281. [2022-02-16 13:45:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.732142857142857) internal successors, (765), 280 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 765 transitions. [2022-02-16 13:45:29,364 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 765 transitions. Word has length 16 [2022-02-16 13:45:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:29,364 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 765 transitions. [2022-02-16 13:45:29,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 765 transitions. [2022-02-16 13:45:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:29,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:29,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:29,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:29,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:29,567 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:29,567 INFO L85 PathProgramCache]: Analyzing trace with hash 608535423, now seen corresponding path program 155 times [2022-02-16 13:45:29,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:29,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507160192] [2022-02-16 13:45:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:29,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:29,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:29,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507160192] [2022-02-16 13:45:29,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507160192] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:29,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408157057] [2022-02-16 13:45:29,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:45:29,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:29,814 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:29,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-16 13:45:29,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:45:29,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:29,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:29,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:30,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:30,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:30,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-02-16 13:45:30,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:30,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:45:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:30,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:31,450 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:31,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 235 treesize of output 223 [2022-02-16 13:45:31,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:31,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:31,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:31,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 199 treesize of output 233 [2022-02-16 13:45:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:31,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408157057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:31,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:31,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:45:31,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99096935] [2022-02-16 13:45:31,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:31,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:45:31,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:31,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:45:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:45:31,889 INFO L87 Difference]: Start difference. First operand 281 states and 765 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:34,820 INFO L93 Difference]: Finished difference Result 392 states and 976 transitions. [2022-02-16 13:45:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:45:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:34,821 INFO L225 Difference]: With dead ends: 392 [2022-02-16 13:45:34,821 INFO L226 Difference]: Without dead ends: 383 [2022-02-16 13:45:34,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=260, Invalid=1720, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 13:45:34,821 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 69 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:34,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 58 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:45:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-16 13:45:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 299. [2022-02-16 13:45:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.751677852348993) internal successors, (820), 298 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 820 transitions. [2022-02-16 13:45:34,824 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 820 transitions. Word has length 16 [2022-02-16 13:45:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:34,825 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 820 transitions. [2022-02-16 13:45:34,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 820 transitions. [2022-02-16 13:45:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:34,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:34,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:34,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-02-16 13:45:35,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:35,026 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:35,026 INFO L85 PathProgramCache]: Analyzing trace with hash 855908159, now seen corresponding path program 156 times [2022-02-16 13:45:35,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:35,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658451113] [2022-02-16 13:45:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:35,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:35,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:35,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658451113] [2022-02-16 13:45:35,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658451113] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:35,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610881963] [2022-02-16 13:45:35,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:45:35,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:35,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:35,355 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:35,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-16 13:45:35,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:45:35,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:35,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:36,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:36,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:36,047 INFO L353 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-02-16 13:45:36,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 77 [2022-02-16 13:45:36,054 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:45:36,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:45:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:36,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:37,149 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:37,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-02-16 13:45:37,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:37,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:37,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:37,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:37,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-02-16 13:45:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:37,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610881963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:37,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:37,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:45:37,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073786398] [2022-02-16 13:45:37,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:37,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:45:37,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:37,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:45:37,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:45:37,559 INFO L87 Difference]: Start difference. First operand 299 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:39,247 INFO L93 Difference]: Finished difference Result 423 states and 1113 transitions. [2022-02-16 13:45:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:45:39,247 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:39,248 INFO L225 Difference]: With dead ends: 423 [2022-02-16 13:45:39,248 INFO L226 Difference]: Without dead ends: 413 [2022-02-16 13:45:39,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=216, Invalid=1344, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:45:39,249 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:39,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 35 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 593 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-02-16 13:45:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-02-16 13:45:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 328. [2022-02-16 13:45:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.81651376146789) internal successors, (921), 327 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 921 transitions. [2022-02-16 13:45:39,254 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 921 transitions. Word has length 16 [2022-02-16 13:45:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:39,254 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 921 transitions. [2022-02-16 13:45:39,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 921 transitions. [2022-02-16 13:45:39,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:39,254 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:39,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:39,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-02-16 13:45:39,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-16 13:45:39,463 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1831537951, now seen corresponding path program 157 times [2022-02-16 13:45:39,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:39,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029478476] [2022-02-16 13:45:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:39,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:39,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:39,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029478476] [2022-02-16 13:45:39,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029478476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:39,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131665706] [2022-02-16 13:45:39,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:45:39,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:39,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:39,695 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:39,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-16 13:45:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:39,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:39,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:40,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:40,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:40,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:40,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2022-02-16 13:45:40,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:40,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:45:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:40,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:41,594 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:41,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-02-16 13:45:41,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:41,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:41,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:41,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:41,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-02-16 13:45:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:42,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131665706] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:42,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:42,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:45:42,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259909927] [2022-02-16 13:45:42,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:42,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:45:42,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:42,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:45:42,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:45:42,028 INFO L87 Difference]: Start difference. First operand 328 states and 921 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:42,764 INFO L93 Difference]: Finished difference Result 400 states and 1067 transitions. [2022-02-16 13:45:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:45:42,764 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:42,765 INFO L225 Difference]: With dead ends: 400 [2022-02-16 13:45:42,765 INFO L226 Difference]: Without dead ends: 393 [2022-02-16 13:45:42,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:45:42,765 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:42,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 33 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 519 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-02-16 13:45:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-02-16 13:45:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 284. [2022-02-16 13:45:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.724381625441696) internal successors, (771), 283 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 771 transitions. [2022-02-16 13:45:42,769 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 771 transitions. Word has length 16 [2022-02-16 13:45:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:42,769 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 771 transitions. [2022-02-16 13:45:42,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 771 transitions. [2022-02-16 13:45:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:42,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:42,770 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:42,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:42,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:42,979 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash 439588543, now seen corresponding path program 158 times [2022-02-16 13:45:42,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:42,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636232614] [2022-02-16 13:45:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:42,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:43,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:43,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636232614] [2022-02-16 13:45:43,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636232614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:43,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030122921] [2022-02-16 13:45:43,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:45:43,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:43,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:43,221 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:43,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-16 13:45:43,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:45:43,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:43,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:43,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:43,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:43,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:45:43,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:43,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:45:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:43,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:45,003 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:45,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-02-16 13:45:45,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:45,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:45,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:45,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:45,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-02-16 13:45:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:45,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030122921] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:45,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:45,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:45:45,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976803159] [2022-02-16 13:45:45,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:45,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:45:45,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:45:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:45:45,489 INFO L87 Difference]: Start difference. First operand 284 states and 771 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:47,176 INFO L93 Difference]: Finished difference Result 387 states and 982 transitions. [2022-02-16 13:45:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:45:47,176 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:47,177 INFO L225 Difference]: With dead ends: 387 [2022-02-16 13:45:47,177 INFO L226 Difference]: Without dead ends: 380 [2022-02-16 13:45:47,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:45:47,177 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 76 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:47,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 35 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 473 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-02-16 13:45:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-16 13:45:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 297. [2022-02-16 13:45:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.75) internal successors, (814), 296 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 814 transitions. [2022-02-16 13:45:47,180 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 814 transitions. Word has length 16 [2022-02-16 13:45:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:47,181 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 814 transitions. [2022-02-16 13:45:47,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 814 transitions. [2022-02-16 13:45:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:47,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:47,181 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:47,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:47,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-02-16 13:45:47,398 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:47,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:47,398 INFO L85 PathProgramCache]: Analyzing trace with hash 827171553, now seen corresponding path program 159 times [2022-02-16 13:45:47,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:47,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136594711] [2022-02-16 13:45:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:47,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:47,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:47,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136594711] [2022-02-16 13:45:47,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136594711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:47,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494490761] [2022-02-16 13:45:47,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:45:47,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:47,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:47,748 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:47,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-16 13:45:47,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:45:47,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:47,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:47,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:48,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:48,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:48,278 INFO L353 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-02-16 13:45:48,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 79 [2022-02-16 13:45:48,284 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:45:48,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-16 13:45:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:48,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:49,236 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:49,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 235 treesize of output 223 [2022-02-16 13:45:49,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:49,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:49,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:49,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:49,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 199 treesize of output 233 [2022-02-16 13:45:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:49,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494490761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:49,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:49,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-16 13:45:49,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286683124] [2022-02-16 13:45:49,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:49,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 13:45:49,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:49,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 13:45:49,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:45:49,685 INFO L87 Difference]: Start difference. First operand 297 states and 814 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:51,803 INFO L93 Difference]: Finished difference Result 451 states and 1130 transitions. [2022-02-16 13:45:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:45:51,803 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:51,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:51,804 INFO L225 Difference]: With dead ends: 451 [2022-02-16 13:45:51,804 INFO L226 Difference]: Without dead ends: 445 [2022-02-16 13:45:51,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:45:51,804 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 61 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:51,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 71 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 13:45:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-02-16 13:45:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 324. [2022-02-16 13:45:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.7925696594427243) internal successors, (902), 323 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 902 transitions. [2022-02-16 13:45:51,809 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 902 transitions. Word has length 16 [2022-02-16 13:45:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:51,809 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 902 transitions. [2022-02-16 13:45:51,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 902 transitions. [2022-02-16 13:45:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:51,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:51,809 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:51,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:52,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:52,019 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash 834901951, now seen corresponding path program 160 times [2022-02-16 13:45:52,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:52,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584017917] [2022-02-16 13:45:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:52,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:52,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:52,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584017917] [2022-02-16 13:45:52,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584017917] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:52,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365369673] [2022-02-16 13:45:52,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:45:52,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:52,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:52,195 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:52,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-16 13:45:52,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:45:52,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:52,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:52,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:52,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:52,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:52,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:52,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:52,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:45:52,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:52,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:45:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:52,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:53,910 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:53,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-02-16 13:45:53,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:53,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:53,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:53,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-02-16 13:45:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:54,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365369673] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:54,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:54,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:45:54,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927005083] [2022-02-16 13:45:54,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:54,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:45:54,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:54,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:45:54,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:45:54,260 INFO L87 Difference]: Start difference. First operand 324 states and 902 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:54,988 INFO L93 Difference]: Finished difference Result 380 states and 1004 transitions. [2022-02-16 13:45:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:45:54,988 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:54,988 INFO L225 Difference]: With dead ends: 380 [2022-02-16 13:45:54,988 INFO L226 Difference]: Without dead ends: 376 [2022-02-16 13:45:54,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:45:54,989 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:54,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 456 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-02-16 13:45:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-02-16 13:45:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 327. [2022-02-16 13:45:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.7975460122699385) internal successors, (912), 326 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 912 transitions. [2022-02-16 13:45:54,993 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 912 transitions. Word has length 16 [2022-02-16 13:45:54,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:54,993 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 912 transitions. [2022-02-16 13:45:54,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:54,993 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 912 transitions. [2022-02-16 13:45:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:54,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:54,993 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:55,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:55,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:55,205 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:55,205 INFO L85 PathProgramCache]: Analyzing trace with hash 418582335, now seen corresponding path program 161 times [2022-02-16 13:45:55,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:55,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750960192] [2022-02-16 13:45:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:55,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:55,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:55,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750960192] [2022-02-16 13:45:55,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750960192] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:55,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19463186] [2022-02-16 13:45:55,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:45:55,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:55,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:55,571 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:55,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-16 13:45:55,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:45:55,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:55,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:55,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:56,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:56,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:56,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:45:56,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:56,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:45:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:56,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:45:57,109 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:45:57,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-02-16 13:45:57,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:57,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:57,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:57,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:45:57,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-02-16 13:45:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:57,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19463186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:45:57,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:45:57,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:45:57,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974711782] [2022-02-16 13:45:57,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:45:57,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:45:57,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:57,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:45:57,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:45:57,565 INFO L87 Difference]: Start difference. First operand 327 states and 912 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:58,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:45:58,582 INFO L93 Difference]: Finished difference Result 407 states and 1070 transitions. [2022-02-16 13:45:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:45:58,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:45:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:45:58,583 INFO L225 Difference]: With dead ends: 407 [2022-02-16 13:45:58,583 INFO L226 Difference]: Without dead ends: 401 [2022-02-16 13:45:58,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:45:58,584 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:45:58,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 555 Invalid, 0 Unknown, 133 Unchecked, 0.3s Time] [2022-02-16 13:45:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-16 13:45:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 337. [2022-02-16 13:45:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.8095238095238093) internal successors, (944), 336 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 944 transitions. [2022-02-16 13:45:58,588 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 944 transitions. Word has length 16 [2022-02-16 13:45:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:45:58,588 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 944 transitions. [2022-02-16 13:45:58,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 944 transitions. [2022-02-16 13:45:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:45:58,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:58,588 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:58,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-02-16 13:45:58,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:58,789 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:45:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash -539816441, now seen corresponding path program 162 times [2022-02-16 13:45:58,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:58,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173956983] [2022-02-16 13:45:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:58,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:59,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:59,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173956983] [2022-02-16 13:45:59,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173956983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:45:59,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039292683] [2022-02-16 13:45:59,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:45:59,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:45:59,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:59,070 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:45:59,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-16 13:45:59,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:45:59,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:45:59,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:45:59,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:45:59,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:59,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:59,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:45:59,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:59,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:45:59,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:45:59,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:45:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:59,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:00,744 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:46:00,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-02-16 13:46:00,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:00,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:00,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:00,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:00,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-02-16 13:46:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:01,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039292683] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:01,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:01,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:46:01,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657123639] [2022-02-16 13:46:01,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:01,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:46:01,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:01,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:46:01,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:46:01,248 INFO L87 Difference]: Start difference. First operand 337 states and 944 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:01,940 INFO L93 Difference]: Finished difference Result 405 states and 1061 transitions. [2022-02-16 13:46:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:46:01,940 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:01,941 INFO L225 Difference]: With dead ends: 405 [2022-02-16 13:46:01,941 INFO L226 Difference]: Without dead ends: 399 [2022-02-16 13:46:01,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:46:01,941 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:01,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 36 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 496 Invalid, 0 Unknown, 187 Unchecked, 0.3s Time] [2022-02-16 13:46:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-16 13:46:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 336. [2022-02-16 13:46:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.808955223880597) internal successors, (941), 335 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 941 transitions. [2022-02-16 13:46:01,945 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 941 transitions. Word has length 16 [2022-02-16 13:46:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:01,945 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 941 transitions. [2022-02-16 13:46:01,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 941 transitions. [2022-02-16 13:46:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:01,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:01,946 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:01,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:02,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:02,161 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash -261476035, now seen corresponding path program 163 times [2022-02-16 13:46:02,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:02,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889182878] [2022-02-16 13:46:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:02,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:02,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:02,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889182878] [2022-02-16 13:46:02,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889182878] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:02,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816333708] [2022-02-16 13:46:02,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:46:02,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:02,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:02,220 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:02,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-16 13:46:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:02,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 13:46:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:02,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:02,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:46:02,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:02,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:46:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:02,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:02,444 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:46:02,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-16 13:46:02,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:46:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:02,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816333708] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:02,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:02,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-16 13:46:02,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469537555] [2022-02-16 13:46:02,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:02,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:46:02,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:46:02,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:46:02,455 INFO L87 Difference]: Start difference. First operand 336 states and 941 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:02,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:02,622 INFO L93 Difference]: Finished difference Result 397 states and 1068 transitions. [2022-02-16 13:46:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:46:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:02,622 INFO L225 Difference]: With dead ends: 397 [2022-02-16 13:46:02,623 INFO L226 Difference]: Without dead ends: 397 [2022-02-16 13:46:02,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:46:02,623 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:02,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 414 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-02-16 13:46:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-02-16 13:46:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 337. [2022-02-16 13:46:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.806547619047619) internal successors, (943), 336 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 943 transitions. [2022-02-16 13:46:02,627 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 943 transitions. Word has length 16 [2022-02-16 13:46:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:02,627 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 943 transitions. [2022-02-16 13:46:02,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 943 transitions. [2022-02-16 13:46:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:02,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:02,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:02,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:02,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-02-16 13:46:02,843 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1998264259, now seen corresponding path program 164 times [2022-02-16 13:46:02,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:02,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957856497] [2022-02-16 13:46:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:02,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:03,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:03,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957856497] [2022-02-16 13:46:03,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957856497] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:03,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632258524] [2022-02-16 13:46:03,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:46:03,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:03,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:03,057 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:03,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-16 13:46:03,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:46:03,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:03,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 13:46:03,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:03,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:03,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:03,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2022-02-16 13:46:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:03,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:03,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:04,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:04,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:04,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:04,458 INFO L353 Elim1Store]: treesize reduction 96, result has 33.8 percent of original size [2022-02-16 13:46:04,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 289 treesize of output 261 [2022-02-16 13:46:04,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:04,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:04,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:04,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:04,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:04,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:04,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:04,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 269 [2022-02-16 13:46:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:05,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632258524] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:05,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:05,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-16 13:46:05,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165786794] [2022-02-16 13:46:05,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:05,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 13:46:05,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 13:46:05,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:46:05,291 INFO L87 Difference]: Start difference. First operand 337 states and 943 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:08,834 INFO L93 Difference]: Finished difference Result 471 states and 1152 transitions. [2022-02-16 13:46:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:46:08,835 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:08,835 INFO L225 Difference]: With dead ends: 471 [2022-02-16 13:46:08,835 INFO L226 Difference]: Without dead ends: 451 [2022-02-16 13:46:08,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=323, Invalid=2227, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 13:46:08,836 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:08,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 88 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 13:46:08,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-02-16 13:46:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 352. [2022-02-16 13:46:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.8005698005698005) internal successors, (983), 351 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 983 transitions. [2022-02-16 13:46:08,840 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 983 transitions. Word has length 16 [2022-02-16 13:46:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:08,840 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 983 transitions. [2022-02-16 13:46:08,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 983 transitions. [2022-02-16 13:46:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:08,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:08,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:08,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-02-16 13:46:09,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:09,044 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:09,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1084614881, now seen corresponding path program 165 times [2022-02-16 13:46:09,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:09,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749210899] [2022-02-16 13:46:09,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:09,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:09,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:09,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749210899] [2022-02-16 13:46:09,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749210899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:09,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5049149] [2022-02-16 13:46:09,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:46:09,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:09,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:09,242 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:09,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-16 13:46:09,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:46:09,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:09,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:09,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:09,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:09,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:09,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:09,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:09,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2022-02-16 13:46:09,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:09,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:09,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:10,760 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-16 13:46:10,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 244 [2022-02-16 13:46:10,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:10,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:10,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:10,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:10,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:10,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:10,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:10,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 256 [2022-02-16 13:46:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:11,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5049149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:11,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:11,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:46:11,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509600579] [2022-02-16 13:46:11,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:11,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:11,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:11,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:11,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:11,286 INFO L87 Difference]: Start difference. First operand 352 states and 983 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:12,436 INFO L93 Difference]: Finished difference Result 491 states and 1281 transitions. [2022-02-16 13:46:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:46:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:12,437 INFO L225 Difference]: With dead ends: 491 [2022-02-16 13:46:12,437 INFO L226 Difference]: Without dead ends: 485 [2022-02-16 13:46:12,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:46:12,438 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:12,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 62 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 672 Invalid, 0 Unknown, 10 Unchecked, 0.4s Time] [2022-02-16 13:46:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-16 13:46:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 393. [2022-02-16 13:46:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.8520408163265305) internal successors, (1118), 392 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1118 transitions. [2022-02-16 13:46:12,443 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1118 transitions. Word has length 16 [2022-02-16 13:46:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:12,443 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1118 transitions. [2022-02-16 13:46:12,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1118 transitions. [2022-02-16 13:46:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:12,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:12,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:12,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:12,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-02-16 13:46:12,644 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1602831229, now seen corresponding path program 166 times [2022-02-16 13:46:12,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:12,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209907078] [2022-02-16 13:46:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:12,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:12,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:12,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209907078] [2022-02-16 13:46:12,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209907078] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:12,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491786767] [2022-02-16 13:46:12,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:46:12,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:12,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:12,968 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:12,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-16 13:46:12,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:46:12,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:12,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:12,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:13,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:13,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:13,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:13,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:13,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2022-02-16 13:46:13,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:13,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:13,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:14,703 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-16 13:46:14,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 289 treesize of output 265 [2022-02-16 13:46:14,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:14,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:14,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:14,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:14,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:14,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:14,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 241 treesize of output 277 [2022-02-16 13:46:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:15,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491786767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:15,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:15,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 13:46:15,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334956965] [2022-02-16 13:46:15,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:15,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:15,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:15,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:15,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:15,347 INFO L87 Difference]: Start difference. First operand 393 states and 1118 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:17,072 INFO L93 Difference]: Finished difference Result 535 states and 1401 transitions. [2022-02-16 13:46:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:46:17,072 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:17,073 INFO L225 Difference]: With dead ends: 535 [2022-02-16 13:46:17,073 INFO L226 Difference]: Without dead ends: 526 [2022-02-16 13:46:17,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 13:46:17,073 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 69 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:17,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 100 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 839 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-02-16 13:46:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-02-16 13:46:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 416. [2022-02-16 13:46:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.896385542168675) internal successors, (1202), 415 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1202 transitions. [2022-02-16 13:46:17,078 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1202 transitions. Word has length 16 [2022-02-16 13:46:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:17,078 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1202 transitions. [2022-02-16 13:46:17,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1202 transitions. [2022-02-16 13:46:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:17,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:17,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:17,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-02-16 13:46:17,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-02-16 13:46:17,286 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash -425796323, now seen corresponding path program 167 times [2022-02-16 13:46:17,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:17,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918103307] [2022-02-16 13:46:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:17,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:17,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:17,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918103307] [2022-02-16 13:46:17,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918103307] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:17,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142900583] [2022-02-16 13:46:17,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:46:17,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:17,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:17,777 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:17,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-16 13:46:17,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:46:17,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:17,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:17,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:18,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:18,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:18,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:18,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:18,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 74 [2022-02-16 13:46:18,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:18,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:46:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:18,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:19,404 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-16 13:46:19,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 280 treesize of output 256 [2022-02-16 13:46:19,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:19,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:19,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:19,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 268 [2022-02-16 13:46:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:20,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142900583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:20,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:20,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-16 13:46:20,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555927135] [2022-02-16 13:46:20,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:20,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:46:20,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:20,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:46:20,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:46:20,094 INFO L87 Difference]: Start difference. First operand 416 states and 1202 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:23,356 INFO L93 Difference]: Finished difference Result 581 states and 1524 transitions. [2022-02-16 13:46:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:46:23,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:23,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:23,357 INFO L225 Difference]: With dead ends: 581 [2022-02-16 13:46:23,357 INFO L226 Difference]: Without dead ends: 571 [2022-02-16 13:46:23,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=249, Invalid=1821, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 13:46:23,358 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 110 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:23,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 90 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 856 Invalid, 0 Unknown, 119 Unchecked, 0.6s Time] [2022-02-16 13:46:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-02-16 13:46:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 452. [2022-02-16 13:46:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.951219512195122) internal successors, (1331), 451 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1331 transitions. [2022-02-16 13:46:23,363 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1331 transitions. Word has length 16 [2022-02-16 13:46:23,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:23,363 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1331 transitions. [2022-02-16 13:46:23,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1331 transitions. [2022-02-16 13:46:23,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:23,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:23,364 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:23,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:23,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2022-02-16 13:46:23,580 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash 186049697, now seen corresponding path program 168 times [2022-02-16 13:46:23,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:23,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314083371] [2022-02-16 13:46:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:23,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:23,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:23,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314083371] [2022-02-16 13:46:23,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314083371] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:23,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014292002] [2022-02-16 13:46:23,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:46:23,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:23,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:23,825 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:23,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-16 13:46:23,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:46:23,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:23,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:23,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:24,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:24,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-02-16 13:46:24,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:24,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:46:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:24,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:25,279 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-16 13:46:25,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 267 treesize of output 243 [2022-02-16 13:46:25,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:25,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:25,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:25,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:25,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:25,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:25,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:25,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 219 treesize of output 255 [2022-02-16 13:46:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:25,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014292002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:25,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:25,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 13:46:25,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107760924] [2022-02-16 13:46:25,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:25,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:25,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:25,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:25,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:25,724 INFO L87 Difference]: Start difference. First operand 452 states and 1331 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:27,244 INFO L93 Difference]: Finished difference Result 580 states and 1598 transitions. [2022-02-16 13:46:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:46:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:27,245 INFO L225 Difference]: With dead ends: 580 [2022-02-16 13:46:27,245 INFO L226 Difference]: Without dead ends: 574 [2022-02-16 13:46:27,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:46:27,246 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 96 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:27,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 55 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:46:27,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-02-16 13:46:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 486. [2022-02-16 13:46:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.9896907216494846) internal successors, (1450), 485 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1450 transitions. [2022-02-16 13:46:27,251 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1450 transitions. Word has length 16 [2022-02-16 13:46:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:27,251 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1450 transitions. [2022-02-16 13:46:27,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1450 transitions. [2022-02-16 13:46:27,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:27,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:27,252 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:27,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:27,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:27,467 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash -3903391, now seen corresponding path program 169 times [2022-02-16 13:46:27,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:27,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86413999] [2022-02-16 13:46:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:27,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:27,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:27,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86413999] [2022-02-16 13:46:27,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86413999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:27,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813179741] [2022-02-16 13:46:27,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:46:27,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:27,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:27,597 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:27,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-16 13:46:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:27,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:27,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:27,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:27,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:27,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:27,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:46:27,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:27,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:28,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:28,899 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-16 13:46:28,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 244 [2022-02-16 13:46:28,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:28,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:28,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:28,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:28,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:28,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:28,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:28,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 256 [2022-02-16 13:46:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:29,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813179741] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:29,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:29,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:46:29,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636260247] [2022-02-16 13:46:29,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:29,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:29,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:29,724 INFO L87 Difference]: Start difference. First operand 486 states and 1450 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:30,944 INFO L93 Difference]: Finished difference Result 619 states and 1694 transitions. [2022-02-16 13:46:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:46:30,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:30,945 INFO L225 Difference]: With dead ends: 619 [2022-02-16 13:46:30,945 INFO L226 Difference]: Without dead ends: 611 [2022-02-16 13:46:30,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:46:30,946 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:30,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 67 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 524 Invalid, 0 Unknown, 228 Unchecked, 0.4s Time] [2022-02-16 13:46:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-16 13:46:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 503. [2022-02-16 13:46:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.99402390438247) internal successors, (1503), 502 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1503 transitions. [2022-02-16 13:46:30,954 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1503 transitions. Word has length 16 [2022-02-16 13:46:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:30,954 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1503 transitions. [2022-02-16 13:46:30,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1503 transitions. [2022-02-16 13:46:30,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:30,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:30,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:30,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:31,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:31,175 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash 439009595, now seen corresponding path program 170 times [2022-02-16 13:46:31,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:31,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800905686] [2022-02-16 13:46:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:31,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:31,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:31,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800905686] [2022-02-16 13:46:31,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800905686] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:31,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519388521] [2022-02-16 13:46:31,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:46:31,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:31,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:31,701 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:31,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-16 13:46:31,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:46:31,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:31,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:32,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:32,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:32,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:32,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:32,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:32,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:46:32,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:32,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:32,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:33,385 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:46:33,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 264 treesize of output 256 [2022-02-16 13:46:33,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:33,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:33,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:33,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:33,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 270 [2022-02-16 13:46:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:33,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519388521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:33,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:33,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 13:46:33,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149714273] [2022-02-16 13:46:33,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:33,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:33,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:33,952 INFO L87 Difference]: Start difference. First operand 503 states and 1503 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:35,365 INFO L93 Difference]: Finished difference Result 687 states and 1996 transitions. [2022-02-16 13:46:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:46:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:35,366 INFO L225 Difference]: With dead ends: 687 [2022-02-16 13:46:35,366 INFO L226 Difference]: Without dead ends: 684 [2022-02-16 13:46:35,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 13:46:35,367 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:35,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 15 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 408 Invalid, 0 Unknown, 245 Unchecked, 0.3s Time] [2022-02-16 13:46:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-16 13:46:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 505. [2022-02-16 13:46:35,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.990079365079365) internal successors, (1507), 504 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1507 transitions. [2022-02-16 13:46:35,373 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1507 transitions. Word has length 16 [2022-02-16 13:46:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:35,373 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1507 transitions. [2022-02-16 13:46:35,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1507 transitions. [2022-02-16 13:46:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:35,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:35,374 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:35,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:35,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-02-16 13:46:35,587 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:35,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:35,587 INFO L85 PathProgramCache]: Analyzing trace with hash 974239397, now seen corresponding path program 171 times [2022-02-16 13:46:35,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:35,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860423531] [2022-02-16 13:46:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:35,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:35,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:35,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860423531] [2022-02-16 13:46:35,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860423531] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:35,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443024818] [2022-02-16 13:46:35,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:46:35,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:35,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:35,910 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:35,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-16 13:46:35,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:46:35,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:35,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 13:46:35,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:36,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:36,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:36,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:36,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:36,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:46:36,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:36,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:36,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:37,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:37,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:37,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:37,682 INFO L353 Elim1Store]: treesize reduction 46, result has 49.5 percent of original size [2022-02-16 13:46:37,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 249 treesize of output 237 [2022-02-16 13:46:37,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:37,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:37,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:37,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:37,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 213 treesize of output 247 [2022-02-16 13:46:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:38,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443024818] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:38,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:38,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-16 13:46:38,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517192403] [2022-02-16 13:46:38,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:38,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 13:46:38,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:38,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 13:46:38,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:46:38,333 INFO L87 Difference]: Start difference. First operand 505 states and 1507 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:39,801 INFO L93 Difference]: Finished difference Result 701 states and 2008 transitions. [2022-02-16 13:46:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:46:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:39,802 INFO L225 Difference]: With dead ends: 701 [2022-02-16 13:46:39,802 INFO L226 Difference]: Without dead ends: 698 [2022-02-16 13:46:39,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 13:46:39,803 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 95 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:39,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 29 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 612 Invalid, 0 Unknown, 133 Unchecked, 0.3s Time] [2022-02-16 13:46:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-16 13:46:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 508. [2022-02-16 13:46:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.990138067061144) internal successors, (1516), 507 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1516 transitions. [2022-02-16 13:46:39,809 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1516 transitions. Word has length 16 [2022-02-16 13:46:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:39,810 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1516 transitions. [2022-02-16 13:46:39,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1516 transitions. [2022-02-16 13:46:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:39,810 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:39,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:39,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:40,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:40,027 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:40,027 INFO L85 PathProgramCache]: Analyzing trace with hash 469179237, now seen corresponding path program 172 times [2022-02-16 13:46:40,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:40,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105291258] [2022-02-16 13:46:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:40,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:40,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:40,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105291258] [2022-02-16 13:46:40,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105291258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:40,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081409124] [2022-02-16 13:46:40,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:46:40,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:40,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:40,319 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:40,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-16 13:46:40,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:46:40,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:40,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:40,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:40,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:40,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:40,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:40,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:40,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:46:40,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:40,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:40,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:41,719 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:46:41,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-02-16 13:46:41,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:41,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:41,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:41,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:41,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-02-16 13:46:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:42,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081409124] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:42,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:42,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 13:46:42,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200606521] [2022-02-16 13:46:42,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:42,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:42,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:42,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:42,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:42,314 INFO L87 Difference]: Start difference. First operand 508 states and 1516 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:43,126 INFO L93 Difference]: Finished difference Result 621 states and 1808 transitions. [2022-02-16 13:46:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:46:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:43,128 INFO L225 Difference]: With dead ends: 621 [2022-02-16 13:46:43,128 INFO L226 Difference]: Without dead ends: 616 [2022-02-16 13:46:43,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:46:43,128 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:43,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 419 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-02-16 13:46:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-02-16 13:46:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 506. [2022-02-16 13:46:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.988118811881188) internal successors, (1509), 505 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1509 transitions. [2022-02-16 13:46:43,134 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1509 transitions. Word has length 16 [2022-02-16 13:46:43,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:43,134 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1509 transitions. [2022-02-16 13:46:43,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1509 transitions. [2022-02-16 13:46:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:43,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:43,135 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:43,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-02-16 13:46:43,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:43,336 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:43,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:43,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1213943779, now seen corresponding path program 173 times [2022-02-16 13:46:43,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:43,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070732235] [2022-02-16 13:46:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:43,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:43,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:43,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070732235] [2022-02-16 13:46:43,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070732235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:43,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635428581] [2022-02-16 13:46:43,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:46:43,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:43,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:43,573 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:43,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-16 13:46:43,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:46:43,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:43,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:43,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:44,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:44,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:44,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:44,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:44,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:46:44,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:44,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:44,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:45,179 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:46:45,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-02-16 13:46:45,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:45,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:45,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:45,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:45,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-02-16 13:46:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:45,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635428581] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:45,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:45,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:46:45,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762577927] [2022-02-16 13:46:45,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:45,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:46:45,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:45,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:46:45,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:46:45,686 INFO L87 Difference]: Start difference. First operand 506 states and 1509 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:46,203 INFO L93 Difference]: Finished difference Result 576 states and 1664 transitions. [2022-02-16 13:46:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:46:46,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:46,205 INFO L225 Difference]: With dead ends: 576 [2022-02-16 13:46:46,205 INFO L226 Difference]: Without dead ends: 573 [2022-02-16 13:46:46,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:46:46,205 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:46,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 33 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 577 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2022-02-16 13:46:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-02-16 13:46:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 508. [2022-02-16 13:46:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.9881656804733727) internal successors, (1515), 507 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1515 transitions. [2022-02-16 13:46:46,213 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1515 transitions. Word has length 16 [2022-02-16 13:46:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:46,213 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1515 transitions. [2022-02-16 13:46:46,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1515 transitions. [2022-02-16 13:46:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:46,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:46,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:46,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:46,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:46,430 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:46,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:46,430 INFO L85 PathProgramCache]: Analyzing trace with hash 846916023, now seen corresponding path program 174 times [2022-02-16 13:46:46,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:46,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283029605] [2022-02-16 13:46:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:46,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:46,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:46,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283029605] [2022-02-16 13:46:46,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283029605] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:46,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007010206] [2022-02-16 13:46:46,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:46:46,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:46,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:46,805 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:46,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-16 13:46:46,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:46:46,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:46,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:46,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:47,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:47,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:46:47,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:47,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:47,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:48,056 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:46:48,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 244 treesize of output 236 [2022-02-16 13:46:48,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:48,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:48,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:48,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 212 treesize of output 250 [2022-02-16 13:46:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:48,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007010206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:48,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:48,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 13:46:48,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790957357] [2022-02-16 13:46:48,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:48,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:48,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:48,493 INFO L87 Difference]: Start difference. First operand 508 states and 1515 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:49,194 INFO L93 Difference]: Finished difference Result 597 states and 1696 transitions. [2022-02-16 13:46:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:46:49,194 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:49,195 INFO L225 Difference]: With dead ends: 597 [2022-02-16 13:46:49,196 INFO L226 Difference]: Without dead ends: 591 [2022-02-16 13:46:49,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:46:49,196 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:49,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 688 Invalid, 0 Unknown, 102 Unchecked, 0.3s Time] [2022-02-16 13:46:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-02-16 13:46:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 511. [2022-02-16 13:46:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.9901960784313726) internal successors, (1525), 510 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1525 transitions. [2022-02-16 13:46:49,202 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1525 transitions. Word has length 16 [2022-02-16 13:46:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:49,202 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1525 transitions. [2022-02-16 13:46:49,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1525 transitions. [2022-02-16 13:46:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:49,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:49,203 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:49,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:49,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:49,419 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1920001403, now seen corresponding path program 175 times [2022-02-16 13:46:49,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:49,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543917023] [2022-02-16 13:46:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:49,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:49,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:49,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543917023] [2022-02-16 13:46:49,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543917023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:49,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475718726] [2022-02-16 13:46:49,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:46:49,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:49,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:49,600 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:49,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-16 13:46:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:49,623 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:50,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:50,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:50,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:46:50,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:50,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:50,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:50,766 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:46:50,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-02-16 13:46:50,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:50,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:50,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:50,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:50,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-02-16 13:46:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:51,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475718726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:51,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:51,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:46:51,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779817719] [2022-02-16 13:46:51,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:51,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:46:51,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:46:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:46:51,155 INFO L87 Difference]: Start difference. First operand 511 states and 1525 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:51,841 INFO L93 Difference]: Finished difference Result 599 states and 1710 transitions. [2022-02-16 13:46:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:46:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:51,842 INFO L225 Difference]: With dead ends: 599 [2022-02-16 13:46:51,842 INFO L226 Difference]: Without dead ends: 590 [2022-02-16 13:46:51,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:46:51,842 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:51,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 25 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 447 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-02-16 13:46:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-02-16 13:46:51,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 513. [2022-02-16 13:46:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.98828125) internal successors, (1530), 512 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:51,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1530 transitions. [2022-02-16 13:46:51,848 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1530 transitions. Word has length 16 [2022-02-16 13:46:51,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:51,849 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1530 transitions. [2022-02-16 13:46:51,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:51,849 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1530 transitions. [2022-02-16 13:46:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:51,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:51,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:51,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:52,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-02-16 13:46:52,066 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2135323555, now seen corresponding path program 176 times [2022-02-16 13:46:52,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:52,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197781961] [2022-02-16 13:46:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:52,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:52,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:52,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197781961] [2022-02-16 13:46:52,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197781961] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:52,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420563533] [2022-02-16 13:46:52,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:46:52,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:52,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:52,233 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:52,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-16 13:46:52,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:46:52,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:52,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:52,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:52,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:52,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:46:52,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:52,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:52,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:53,560 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:46:53,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-02-16 13:46:53,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:53,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:53,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:53,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:53,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-02-16 13:46:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:53,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420563533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:53,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:53,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:46:53,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499256431] [2022-02-16 13:46:53,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:53,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:46:53,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:53,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:46:53,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:46:53,964 INFO L87 Difference]: Start difference. First operand 513 states and 1530 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:54,786 INFO L93 Difference]: Finished difference Result 599 states and 1707 transitions. [2022-02-16 13:46:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:46:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:54,787 INFO L225 Difference]: With dead ends: 599 [2022-02-16 13:46:54,787 INFO L226 Difference]: Without dead ends: 595 [2022-02-16 13:46:54,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:46:54,787 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:54,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 43 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 638 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-02-16 13:46:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-16 13:46:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 518. [2022-02-16 13:46:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.990328820116054) internal successors, (1546), 517 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1546 transitions. [2022-02-16 13:46:54,794 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1546 transitions. Word has length 16 [2022-02-16 13:46:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:54,795 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1546 transitions. [2022-02-16 13:46:54,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1546 transitions. [2022-02-16 13:46:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:54,796 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:54,796 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:54,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:55,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-02-16 13:46:55,014 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:55,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:55,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2127593157, now seen corresponding path program 177 times [2022-02-16 13:46:55,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:55,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632915095] [2022-02-16 13:46:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:55,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:55,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:55,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632915095] [2022-02-16 13:46:55,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632915095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:55,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295477777] [2022-02-16 13:46:55,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:46:55,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:55,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:55,218 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:55,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-16 13:46:55,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:46:55,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:55,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:55,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:55,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:55,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:55,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:46:55,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:55,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:46:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:55,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:56,451 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:46:56,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 236 treesize of output 224 [2022-02-16 13:46:56,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:56,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:56,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:56,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:56,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 234 [2022-02-16 13:46:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:57,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295477777] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:57,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:57,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:46:57,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087312388] [2022-02-16 13:46:57,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:57,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:57,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:57,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:57,003 INFO L87 Difference]: Start difference. First operand 518 states and 1546 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:58,539 INFO L93 Difference]: Finished difference Result 657 states and 1820 transitions. [2022-02-16 13:46:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:46:58,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:46:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:58,540 INFO L225 Difference]: With dead ends: 657 [2022-02-16 13:46:58,540 INFO L226 Difference]: Without dead ends: 651 [2022-02-16 13:46:58,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 13:46:58,541 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:58,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 92 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:46:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-02-16 13:46:58,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 526. [2022-02-16 13:46:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 2.998095238095238) internal successors, (1574), 525 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1574 transitions. [2022-02-16 13:46:58,547 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1574 transitions. Word has length 16 [2022-02-16 13:46:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:58,548 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1574 transitions. [2022-02-16 13:46:58,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:58,548 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1574 transitions. [2022-02-16 13:46:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:46:58,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:58,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:58,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:58,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-02-16 13:46:58,766 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:46:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:58,767 INFO L85 PathProgramCache]: Analyzing trace with hash -328145499, now seen corresponding path program 178 times [2022-02-16 13:46:58,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:58,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633842973] [2022-02-16 13:46:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:58,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:59,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:59,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633842973] [2022-02-16 13:46:59,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633842973] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:59,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686646970] [2022-02-16 13:46:59,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:46:59,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:59,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:59,027 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:59,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-16 13:46:59,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:46:59,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:59,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:46:59,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:59,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:59,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:59,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:59,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:46:59,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:59,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:46:59,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:59,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:46:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:59,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:00,382 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:47:00,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-02-16 13:47:00,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:00,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:00,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:00,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:00,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-02-16 13:47:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:00,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686646970] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:00,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:00,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:47:00,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367959524] [2022-02-16 13:47:00,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:00,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:47:00,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:47:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:00,768 INFO L87 Difference]: Start difference. First operand 526 states and 1574 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:01,099 INFO L93 Difference]: Finished difference Result 565 states and 1655 transitions. [2022-02-16 13:47:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:47:01,100 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:01,101 INFO L225 Difference]: With dead ends: 565 [2022-02-16 13:47:01,101 INFO L226 Difference]: Without dead ends: 562 [2022-02-16 13:47:01,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:47:01,102 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:01,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 16 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 357 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-02-16 13:47:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-02-16 13:47:01,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 528. [2022-02-16 13:47:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.998102466793169) internal successors, (1580), 527 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1580 transitions. [2022-02-16 13:47:01,109 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1580 transitions. Word has length 16 [2022-02-16 13:47:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:01,109 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1580 transitions. [2022-02-16 13:47:01,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1580 transitions. [2022-02-16 13:47:01,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:01,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:01,110 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:01,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-02-16 13:47:01,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:01,311 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:01,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1732714303, now seen corresponding path program 179 times [2022-02-16 13:47:01,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:01,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450390535] [2022-02-16 13:47:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:01,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:01,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:01,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450390535] [2022-02-16 13:47:01,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450390535] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:01,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892142973] [2022-02-16 13:47:01,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:01,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:01,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:01,566 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:01,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-16 13:47:01,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:47:01,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:01,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:01,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:02,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:02,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:02,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:02,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:02,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:02,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:02,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:47:02,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:02,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:47:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:02,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:03,175 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:47:03,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-02-16 13:47:03,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:03,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:03,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:03,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:03,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-02-16 13:47:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:03,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892142973] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:03,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:03,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:47:03,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674560352] [2022-02-16 13:47:03,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:03,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:47:03,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:47:03,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:03,575 INFO L87 Difference]: Start difference. First operand 528 states and 1580 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:04,077 INFO L93 Difference]: Finished difference Result 581 states and 1682 transitions. [2022-02-16 13:47:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:47:04,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:04,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:04,078 INFO L225 Difference]: With dead ends: 581 [2022-02-16 13:47:04,078 INFO L226 Difference]: Without dead ends: 575 [2022-02-16 13:47:04,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:47:04,079 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:04,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 29 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 429 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-02-16 13:47:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-16 13:47:04,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 529. [2022-02-16 13:47:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.9981060606060606) internal successors, (1583), 528 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1583 transitions. [2022-02-16 13:47:04,085 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1583 transitions. Word has length 16 [2022-02-16 13:47:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:04,085 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1583 transitions. [2022-02-16 13:47:04,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1583 transitions. [2022-02-16 13:47:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:04,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:04,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:04,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:04,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:04,302 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:04,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1249525275, now seen corresponding path program 180 times [2022-02-16 13:47:04,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:04,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802768384] [2022-02-16 13:47:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:04,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:04,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:04,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802768384] [2022-02-16 13:47:04,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802768384] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:04,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364315364] [2022-02-16 13:47:04,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:47:04,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:04,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:04,450 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:04,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-16 13:47:04,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:47:04,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:04,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:04,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:04,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:04,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:04,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:04,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:47:04,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:04,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:47:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:04,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:05,763 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:47:05,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-02-16 13:47:05,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:05,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:05,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:05,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:05,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-02-16 13:47:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:06,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364315364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:06,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:06,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:47:06,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969995810] [2022-02-16 13:47:06,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:06,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:47:06,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:06,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:47:06,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:06,158 INFO L87 Difference]: Start difference. First operand 529 states and 1583 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:07,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:07,331 INFO L93 Difference]: Finished difference Result 623 states and 1752 transitions. [2022-02-16 13:47:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:47:07,331 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:07,332 INFO L225 Difference]: With dead ends: 623 [2022-02-16 13:47:07,332 INFO L226 Difference]: Without dead ends: 617 [2022-02-16 13:47:07,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:47:07,333 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:07,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 77 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 742 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-02-16 13:47:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-16 13:47:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 545. [2022-02-16 13:47:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.0073529411764706) internal successors, (1636), 544 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1636 transitions. [2022-02-16 13:47:07,354 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1636 transitions. Word has length 16 [2022-02-16 13:47:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:07,354 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1636 transitions. [2022-02-16 13:47:07,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1636 transitions. [2022-02-16 13:47:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:07,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:07,355 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:07,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:07,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:07,570 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:07,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:07,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1241794877, now seen corresponding path program 181 times [2022-02-16 13:47:07,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:07,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919278508] [2022-02-16 13:47:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:07,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:07,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:07,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919278508] [2022-02-16 13:47:07,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919278508] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:07,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627024824] [2022-02-16 13:47:07,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:47:07,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:07,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:07,916 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:07,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-16 13:47:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:07,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:07,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:08,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:08,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:08,331 INFO L353 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-02-16 13:47:08,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 79 [2022-02-16 13:47:08,335 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:08,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-16 13:47:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:08,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:09,243 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:47:09,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 261 treesize of output 249 [2022-02-16 13:47:09,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:09,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:09,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:09,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:09,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 225 treesize of output 259 [2022-02-16 13:47:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:09,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627024824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:09,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:09,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 13:47:09,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812568996] [2022-02-16 13:47:09,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:09,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:47:09,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:09,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:47:09,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:09,571 INFO L87 Difference]: Start difference. First operand 545 states and 1636 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:11,917 INFO L93 Difference]: Finished difference Result 645 states and 1819 transitions. [2022-02-16 13:47:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:47:11,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:11,918 INFO L225 Difference]: With dead ends: 645 [2022-02-16 13:47:11,918 INFO L226 Difference]: Without dead ends: 635 [2022-02-16 13:47:11,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 13:47:11,919 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:11,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 69 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:47:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-02-16 13:47:11,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 552. [2022-02-16 13:47:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 3.016333938294011) internal successors, (1662), 551 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1662 transitions. [2022-02-16 13:47:11,925 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1662 transitions. Word has length 16 [2022-02-16 13:47:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:11,925 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1662 transitions. [2022-02-16 13:47:11,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1662 transitions. [2022-02-16 13:47:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:11,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:11,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:11,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:12,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:12,139 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1711708095, now seen corresponding path program 182 times [2022-02-16 13:47:12,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:12,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145970686] [2022-02-16 13:47:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:12,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:12,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:12,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145970686] [2022-02-16 13:47:12,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145970686] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:12,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107672741] [2022-02-16 13:47:12,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:47:12,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:12,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:12,301 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:12,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-16 13:47:12,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:12,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:12,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:12,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:12,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:12,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:47:12,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:12,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:47:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:12,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:13,689 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:47:13,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-02-16 13:47:13,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:13,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:13,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:13,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:13,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-02-16 13:47:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:14,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107672741] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:14,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:14,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:47:14,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590823239] [2022-02-16 13:47:14,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:14,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:47:14,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:47:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:14,286 INFO L87 Difference]: Start difference. First operand 552 states and 1662 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:15,610 INFO L93 Difference]: Finished difference Result 633 states and 1803 transitions. [2022-02-16 13:47:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:47:15,611 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:15,612 INFO L225 Difference]: With dead ends: 633 [2022-02-16 13:47:15,612 INFO L226 Difference]: Without dead ends: 621 [2022-02-16 13:47:15,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:47:15,612 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:15,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 46 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 553 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-02-16 13:47:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-02-16 13:47:15,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 554. [2022-02-16 13:47:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.0180831826401446) internal successors, (1669), 553 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1669 transitions. [2022-02-16 13:47:15,619 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1669 transitions. Word has length 16 [2022-02-16 13:47:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:15,619 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1669 transitions. [2022-02-16 13:47:15,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1669 transitions. [2022-02-16 13:47:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:15,619 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:15,619 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:15,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-02-16 13:47:15,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:15,835 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:15,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:15,836 INFO L85 PathProgramCache]: Analyzing trace with hash -854211867, now seen corresponding path program 183 times [2022-02-16 13:47:15,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:15,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979414228] [2022-02-16 13:47:15,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:15,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:16,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:16,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979414228] [2022-02-16 13:47:16,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979414228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:16,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467636830] [2022-02-16 13:47:16,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:47:16,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:16,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:16,068 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:16,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-16 13:47:16,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:47:16,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:16,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:16,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:16,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:16,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:16,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:16,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:16,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:16,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:16,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:47:16,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:16,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:47:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:16,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:17,675 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:47:17,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-02-16 13:47:17,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:17,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:17,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:17,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:17,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-02-16 13:47:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:18,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467636830] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:18,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:18,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:47:18,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387940509] [2022-02-16 13:47:18,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:18,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:47:18,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:18,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:47:18,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:18,048 INFO L87 Difference]: Start difference. First operand 554 states and 1669 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:19,238 INFO L93 Difference]: Finished difference Result 687 states and 1918 transitions. [2022-02-16 13:47:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:47:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:19,239 INFO L225 Difference]: With dead ends: 687 [2022-02-16 13:47:19,239 INFO L226 Difference]: Without dead ends: 673 [2022-02-16 13:47:19,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:47:19,239 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:19,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 58 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 642 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-02-16 13:47:19,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-02-16 13:47:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 553. [2022-02-16 13:47:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 3.032608695652174) internal successors, (1674), 552 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1674 transitions. [2022-02-16 13:47:19,246 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1674 transitions. Word has length 16 [2022-02-16 13:47:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:19,246 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 1674 transitions. [2022-02-16 13:47:19,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1674 transitions. [2022-02-16 13:47:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:19,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:19,247 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:19,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:19,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:19,460 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1270531483, now seen corresponding path program 184 times [2022-02-16 13:47:19,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:19,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713259442] [2022-02-16 13:47:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:19,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:19,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:19,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713259442] [2022-02-16 13:47:19,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713259442] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:19,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522024247] [2022-02-16 13:47:19,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:47:19,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:19,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:19,692 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:19,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-16 13:47:19,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:47:19,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:19,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:19,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:20,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:20,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:20,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:20,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:20,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2022-02-16 13:47:20,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:20,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:47:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:20,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:20,944 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:47:20,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-02-16 13:47:20,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:20,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:20,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:20,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:20,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-02-16 13:47:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:21,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522024247] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:21,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:21,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-16 13:47:21,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036066952] [2022-02-16 13:47:21,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:21,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:47:21,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:47:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:47:21,496 INFO L87 Difference]: Start difference. First operand 553 states and 1674 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:22,374 INFO L93 Difference]: Finished difference Result 639 states and 1850 transitions. [2022-02-16 13:47:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:47:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:22,375 INFO L225 Difference]: With dead ends: 639 [2022-02-16 13:47:22,375 INFO L226 Difference]: Without dead ends: 630 [2022-02-16 13:47:22,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:47:22,375 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:22,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 50 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 588 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-02-16 13:47:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-02-16 13:47:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 551. [2022-02-16 13:47:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 3.0454545454545454) internal successors, (1675), 550 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1675 transitions. [2022-02-16 13:47:22,382 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1675 transitions. Word has length 16 [2022-02-16 13:47:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:22,382 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 1675 transitions. [2022-02-16 13:47:22,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1675 transitions. [2022-02-16 13:47:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:22,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:22,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:22,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-02-16 13:47:22,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:22,596 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:22,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1542761215, now seen corresponding path program 185 times [2022-02-16 13:47:22,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:22,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328065550] [2022-02-16 13:47:22,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:22,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:22,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:22,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328065550] [2022-02-16 13:47:22,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328065550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:22,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071479816] [2022-02-16 13:47:22,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:22,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:22,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:22,758 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:22,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-16 13:47:22,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:47:22,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:22,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:22,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:23,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:23,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-02-16 13:47:23,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:23,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:47:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:23,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:23,878 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-16 13:47:23,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 236 treesize of output 224 [2022-02-16 13:47:23,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:23,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:23,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:23,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:23,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 234 [2022-02-16 13:47:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:24,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071479816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:24,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:24,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:47:24,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107562728] [2022-02-16 13:47:24,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:24,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:47:24,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:47:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:24,279 INFO L87 Difference]: Start difference. First operand 551 states and 1675 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:26,645 INFO L93 Difference]: Finished difference Result 697 states and 1948 transitions. [2022-02-16 13:47:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:47:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:26,646 INFO L225 Difference]: With dead ends: 697 [2022-02-16 13:47:26,646 INFO L226 Difference]: Without dead ends: 690 [2022-02-16 13:47:26,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 13:47:26,647 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:26,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 81 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:47:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-16 13:47:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 554. [2022-02-16 13:47:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.0433996383363473) internal successors, (1683), 553 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:26,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1683 transitions. [2022-02-16 13:47:26,654 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1683 transitions. Word has length 16 [2022-02-16 13:47:26,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:26,654 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1683 transitions. [2022-02-16 13:47:26,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1683 transitions. [2022-02-16 13:47:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:26,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:26,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:26,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-02-16 13:47:26,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:26,867 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1361797405, now seen corresponding path program 186 times [2022-02-16 13:47:26,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:26,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672798250] [2022-02-16 13:47:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:26,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:27,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:27,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672798250] [2022-02-16 13:47:27,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672798250] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:27,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829036613] [2022-02-16 13:47:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:47:27,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:27,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:27,075 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:27,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-16 13:47:27,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:47:27,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:27,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:27,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:27,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:27,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:27,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:27,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:27,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:27,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:27,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:47:27,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:27,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:47:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:27,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:28,294 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-16 13:47:28,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 267 treesize of output 243 [2022-02-16 13:47:28,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:28,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:28,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:28,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:28,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:28,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:28,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:28,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 219 treesize of output 255 [2022-02-16 13:47:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:28,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829036613] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:28,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:28,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 13:47:28,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86392056] [2022-02-16 13:47:28,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:28,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:47:28,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:47:28,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:28,724 INFO L87 Difference]: Start difference. First operand 554 states and 1683 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:29,001 INFO L93 Difference]: Finished difference Result 589 states and 1744 transitions. [2022-02-16 13:47:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:47:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:29,002 INFO L225 Difference]: With dead ends: 589 [2022-02-16 13:47:29,002 INFO L226 Difference]: Without dead ends: 586 [2022-02-16 13:47:29,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:47:29,003 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:29,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 371 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-02-16 13:47:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-16 13:47:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 558. [2022-02-16 13:47:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.043087971274686) internal successors, (1695), 557 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1695 transitions. [2022-02-16 13:47:29,009 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1695 transitions. Word has length 16 [2022-02-16 13:47:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:29,009 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 1695 transitions. [2022-02-16 13:47:29,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1695 transitions. [2022-02-16 13:47:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:29,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:29,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:29,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-02-16 13:47:29,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-02-16 13:47:29,226 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:29,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:29,226 INFO L85 PathProgramCache]: Analyzing trace with hash 856737245, now seen corresponding path program 187 times [2022-02-16 13:47:29,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:29,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332318367] [2022-02-16 13:47:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:29,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:29,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:29,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332318367] [2022-02-16 13:47:29,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332318367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:29,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806593399] [2022-02-16 13:47:29,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:47:29,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:29,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:29,601 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:29,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-16 13:47:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:29,628 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:29,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:30,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:30,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:30,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:30,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:47:30,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:30,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:47:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:30,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:31,020 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-16 13:47:31,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 267 treesize of output 243 [2022-02-16 13:47:31,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:31,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:31,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:31,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:31,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:31,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:31,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:31,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 219 treesize of output 255 [2022-02-16 13:47:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:31,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806593399] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:31,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:31,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 13:47:31,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436852203] [2022-02-16 13:47:31,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:31,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:47:31,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:47:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:31,391 INFO L87 Difference]: Start difference. First operand 558 states and 1695 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:31,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:31,933 INFO L93 Difference]: Finished difference Result 621 states and 1821 transitions. [2022-02-16 13:47:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:47:31,933 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:31,934 INFO L225 Difference]: With dead ends: 621 [2022-02-16 13:47:31,934 INFO L226 Difference]: Without dead ends: 612 [2022-02-16 13:47:31,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:47:31,934 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:31,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 35 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 433 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-02-16 13:47:31,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-02-16 13:47:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 569. [2022-02-16 13:47:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.038732394366197) internal successors, (1726), 568 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1726 transitions. [2022-02-16 13:47:31,941 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1726 transitions. Word has length 16 [2022-02-16 13:47:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:31,941 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1726 transitions. [2022-02-16 13:47:31,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1726 transitions. [2022-02-16 13:47:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:31,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:31,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:31,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:32,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:32,158 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:32,158 INFO L85 PathProgramCache]: Analyzing trace with hash 448148027, now seen corresponding path program 188 times [2022-02-16 13:47:32,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:32,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112237124] [2022-02-16 13:47:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:32,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:32,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:32,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112237124] [2022-02-16 13:47:32,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112237124] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:32,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569472578] [2022-02-16 13:47:32,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:47:32,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:32,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:32,355 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:32,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-16 13:47:32,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:32,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:32,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:32,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:32,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:47:32,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:32,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:47:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:32,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:33,826 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-16 13:47:33,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 244 [2022-02-16 13:47:33,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:33,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:33,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:33,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:33,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:33,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:33,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:33,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 256 [2022-02-16 13:47:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:34,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569472578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:34,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:34,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:47:34,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222448552] [2022-02-16 13:47:34,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:34,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:47:34,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:34,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:47:34,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:34,390 INFO L87 Difference]: Start difference. First operand 569 states and 1726 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:35,741 INFO L93 Difference]: Finished difference Result 718 states and 2024 transitions. [2022-02-16 13:47:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:47:35,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:35,743 INFO L225 Difference]: With dead ends: 718 [2022-02-16 13:47:35,743 INFO L226 Difference]: Without dead ends: 711 [2022-02-16 13:47:35,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:47:35,743 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 88 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:35,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 55 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:47:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-02-16 13:47:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 609. [2022-02-16 13:47:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 3.0625) internal successors, (1862), 608 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1862 transitions. [2022-02-16 13:47:35,750 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1862 transitions. Word has length 16 [2022-02-16 13:47:35,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:35,751 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 1862 transitions. [2022-02-16 13:47:35,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1862 transitions. [2022-02-16 13:47:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:35,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:35,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:35,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:35,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-02-16 13:47:35,967 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash -450417157, now seen corresponding path program 189 times [2022-02-16 13:47:35,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:35,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73222145] [2022-02-16 13:47:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:35,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:36,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:36,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73222145] [2022-02-16 13:47:36,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73222145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:36,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063236219] [2022-02-16 13:47:36,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:47:36,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:36,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:36,314 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:36,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-16 13:47:36,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:47:36,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:36,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-16 13:47:36,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:37,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:37,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:37,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:37,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:37,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:37,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-02-16 13:47:37,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:37,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:47:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:37,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:38,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:38,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:38,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:38,184 INFO L353 Elim1Store]: treesize reduction 96, result has 33.8 percent of original size [2022-02-16 13:47:38,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 289 treesize of output 261 [2022-02-16 13:47:38,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:38,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:38,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:38,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:38,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:38,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:38,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:38,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 269 [2022-02-16 13:47:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:39,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063236219] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:39,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:39,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-16 13:47:39,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827991300] [2022-02-16 13:47:39,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:39,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 13:47:39,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:39,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 13:47:39,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:47:39,111 INFO L87 Difference]: Start difference. First operand 609 states and 1862 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:42,587 INFO L93 Difference]: Finished difference Result 800 states and 2253 transitions. [2022-02-16 13:47:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 13:47:42,588 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:42,589 INFO L225 Difference]: With dead ends: 800 [2022-02-16 13:47:42,589 INFO L226 Difference]: Without dead ends: 788 [2022-02-16 13:47:42,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=385, Invalid=2695, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 13:47:42,589 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 79 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:42,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 86 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 877 Invalid, 0 Unknown, 219 Unchecked, 0.5s Time] [2022-02-16 13:47:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-16 13:47:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2022-02-16 13:47:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 3.107946026986507) internal successors, (2073), 667 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2073 transitions. [2022-02-16 13:47:42,597 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2073 transitions. Word has length 16 [2022-02-16 13:47:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:42,597 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 2073 transitions. [2022-02-16 13:47:42,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2073 transitions. [2022-02-16 13:47:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:42,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:42,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:42,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:42,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-02-16 13:47:42,799 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash -231781027, now seen corresponding path program 190 times [2022-02-16 13:47:42,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:42,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312281431] [2022-02-16 13:47:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:42,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:43,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:43,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312281431] [2022-02-16 13:47:43,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312281431] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:43,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619928904] [2022-02-16 13:47:43,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:47:43,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:43,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:43,190 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:43,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-16 13:47:43,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:47:43,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:43,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:43,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:43,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:43,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:43,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:47:43,833 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-02-16 13:47:43,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 77 [2022-02-16 13:47:43,839 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:43,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:47:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:43,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:44,878 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-16 13:47:44,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 280 treesize of output 256 [2022-02-16 13:47:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:44,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:44,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:44,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:44,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:44,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 268 [2022-02-16 13:47:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:45,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619928904] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:45,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:45,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-16 13:47:45,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641385320] [2022-02-16 13:47:45,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:45,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:47:45,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:47:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:45,406 INFO L87 Difference]: Start difference. First operand 668 states and 2073 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:46,749 INFO L93 Difference]: Finished difference Result 841 states and 2428 transitions. [2022-02-16 13:47:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:47:46,749 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:46,750 INFO L225 Difference]: With dead ends: 841 [2022-02-16 13:47:46,750 INFO L226 Difference]: Without dead ends: 832 [2022-02-16 13:47:46,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:47:46,751 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:46,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 65 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 780 Invalid, 0 Unknown, 109 Unchecked, 0.4s Time] [2022-02-16 13:47:46,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-02-16 13:47:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 705. [2022-02-16 13:47:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1264204545454546) internal successors, (2201), 704 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2201 transitions. [2022-02-16 13:47:46,759 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2201 transitions. Word has length 16 [2022-02-16 13:47:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:46,759 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2201 transitions. [2022-02-16 13:47:46,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2201 transitions. [2022-02-16 13:47:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:47:46,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:46,760 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:46,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:46,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2022-02-16 13:47:46,976 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:46,977 INFO L85 PathProgramCache]: Analyzing trace with hash -640370245, now seen corresponding path program 191 times [2022-02-16 13:47:46,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:46,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117263713] [2022-02-16 13:47:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:46,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:47,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:47,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117263713] [2022-02-16 13:47:47,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117263713] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:47,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598628145] [2022-02-16 13:47:47,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:47,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:47,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:47,157 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:47,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-16 13:47:47,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:47:47,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:47,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-16 13:47:47,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:47,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:47,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-02-16 13:47:47,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:47,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:47:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:47,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:48,419 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-16 13:47:48,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 244 [2022-02-16 13:47:48,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:48,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:48,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:48,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:48,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:48,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:48,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:48,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 256 [2022-02-16 13:47:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:49,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598628145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:49,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:49,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:47:49,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316934615] [2022-02-16 13:47:49,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:49,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:47:49,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:49,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:47:49,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:49,081 INFO L87 Difference]: Start difference. First operand 705 states and 2201 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:50,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:50,502 INFO L93 Difference]: Finished difference Result 841 states and 2456 transitions. [2022-02-16 13:47:50,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:47:50,502 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:47:50,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:50,504 INFO L225 Difference]: With dead ends: 841 [2022-02-16 13:47:50,504 INFO L226 Difference]: Without dead ends: 834 [2022-02-16 13:47:50,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:47:50,504 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 82 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:50,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 74 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:47:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-02-16 13:47:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 715. [2022-02-16 13:47:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.1330532212885154) internal successors, (2237), 714 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2237 transitions. [2022-02-16 13:47:50,513 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2237 transitions. Word has length 16 [2022-02-16 13:47:50,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:50,513 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 2237 transitions. [2022-02-16 13:47:50,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2237 transitions. [2022-02-16 13:47:50,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:47:50,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:50,514 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:50,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-02-16 13:47:50,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-02-16 13:47:50,723 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1571774135, now seen corresponding path program 192 times [2022-02-16 13:47:50,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:50,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450854221] [2022-02-16 13:47:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:50,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:50,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:50,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450854221] [2022-02-16 13:47:50,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450854221] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:50,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313619308] [2022-02-16 13:47:50,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:47:50,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:50,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:50,828 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:50,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-16 13:47:50,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:47:50,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:50,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:47:50,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:50,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:47:51,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:47:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:51,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:51,096 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:47:51,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:47:51,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:47:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:51,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313619308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:51,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:51,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-16 13:47:51,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667823597] [2022-02-16 13:47:51,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:51,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:47:51,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:51,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:47:51,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:47:51,112 INFO L87 Difference]: Start difference. First operand 715 states and 2237 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:51,385 INFO L93 Difference]: Finished difference Result 946 states and 2878 transitions. [2022-02-16 13:47:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:47:51,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:47:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:51,386 INFO L225 Difference]: With dead ends: 946 [2022-02-16 13:47:51,387 INFO L226 Difference]: Without dead ends: 941 [2022-02-16 13:47:51,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:47:51,387 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:51,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 66 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-02-16 13:47:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 714. [2022-02-16 13:47:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.134642356241234) internal successors, (2235), 713 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2235 transitions. [2022-02-16 13:47:51,396 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2235 transitions. Word has length 17 [2022-02-16 13:47:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:51,396 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 2235 transitions. [2022-02-16 13:47:51,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2235 transitions. [2022-02-16 13:47:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:47:51,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:51,397 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:51,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:51,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:51,604 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:51,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1975304249, now seen corresponding path program 193 times [2022-02-16 13:47:51,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:51,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964937413] [2022-02-16 13:47:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:51,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:51,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:51,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964937413] [2022-02-16 13:47:51,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964937413] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:51,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992860901] [2022-02-16 13:47:51,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:47:51,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:51,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:51,705 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:51,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-16 13:47:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:47:51,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:51,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:47:51,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:47:51,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:47:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:51,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:51,889 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:47:51,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:47:51,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:47:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:51,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992860901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:51,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:51,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-16 13:47:51,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287367772] [2022-02-16 13:47:51,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:51,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:47:51,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:51,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:47:51,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:47:51,900 INFO L87 Difference]: Start difference. First operand 714 states and 2235 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:52,102 INFO L93 Difference]: Finished difference Result 949 states and 2889 transitions. [2022-02-16 13:47:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:47:52,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:47:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:52,104 INFO L225 Difference]: With dead ends: 949 [2022-02-16 13:47:52,104 INFO L226 Difference]: Without dead ends: 949 [2022-02-16 13:47:52,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:52,104 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:52,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 66 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-02-16 13:47:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 715. [2022-02-16 13:47:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.134453781512605) internal successors, (2238), 714 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2238 transitions. [2022-02-16 13:47:52,114 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2238 transitions. Word has length 17 [2022-02-16 13:47:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:52,114 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 2238 transitions. [2022-02-16 13:47:52,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:52,114 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2238 transitions. [2022-02-16 13:47:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:47:52,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:52,115 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:52,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:52,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-02-16 13:47:52,331 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2101260275, now seen corresponding path program 194 times [2022-02-16 13:47:52,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:52,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617376516] [2022-02-16 13:47:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:52,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:52,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:52,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617376516] [2022-02-16 13:47:52,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617376516] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:52,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654037064] [2022-02-16 13:47:52,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:47:52,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:52,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:52,408 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:52,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-16 13:47:52,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:52,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:52,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:47:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:52,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:52,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:47:52,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:52,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:47:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:52,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:52,687 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:47:52,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:47:52,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:47:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:52,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654037064] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:52,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:52,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:47:52,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939463048] [2022-02-16 13:47:52,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:52,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:47:52,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:52,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:47:52,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:52,707 INFO L87 Difference]: Start difference. First operand 715 states and 2238 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:52,973 INFO L93 Difference]: Finished difference Result 987 states and 2942 transitions. [2022-02-16 13:47:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:47:52,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:47:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:52,974 INFO L225 Difference]: With dead ends: 987 [2022-02-16 13:47:52,974 INFO L226 Difference]: Without dead ends: 987 [2022-02-16 13:47:52,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:47:52,975 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:52,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 104 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-02-16 13:47:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 720. [2022-02-16 13:47:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 3.1363004172461753) internal successors, (2255), 719 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2255 transitions. [2022-02-16 13:47:52,987 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2255 transitions. Word has length 17 [2022-02-16 13:47:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:52,987 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 2255 transitions. [2022-02-16 13:47:52,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2255 transitions. [2022-02-16 13:47:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:47:52,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:52,988 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:53,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:53,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:53,204 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:53,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:53,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1392090793, now seen corresponding path program 195 times [2022-02-16 13:47:53,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:53,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282948903] [2022-02-16 13:47:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:53,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:53,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:53,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282948903] [2022-02-16 13:47:53,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282948903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:53,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900324389] [2022-02-16 13:47:53,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:47:53,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:53,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:53,297 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:53,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-16 13:47:53,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:47:53,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:53,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:47:53,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:53,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:53,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:47:53,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:53,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:47:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:53,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:53,618 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:47:53,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:47:53,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:47:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:53,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900324389] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:53,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:53,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:47:53,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269353303] [2022-02-16 13:47:53,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:53,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:47:53,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:47:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:53,631 INFO L87 Difference]: Start difference. First operand 720 states and 2255 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:55,794 INFO L93 Difference]: Finished difference Result 1067 states and 3076 transitions. [2022-02-16 13:47:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-16 13:47:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:47:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:55,795 INFO L225 Difference]: With dead ends: 1067 [2022-02-16 13:47:55,795 INFO L226 Difference]: Without dead ends: 1062 [2022-02-16 13:47:55,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=778, Invalid=4922, Unknown=0, NotChecked=0, Total=5700 [2022-02-16 13:47:55,796 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 174 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:55,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 136 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:47:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-02-16 13:47:55,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 735. [2022-02-16 13:47:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.137602179836512) internal successors, (2303), 734 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2303 transitions. [2022-02-16 13:47:55,805 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2303 transitions. Word has length 17 [2022-02-16 13:47:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:55,805 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2303 transitions. [2022-02-16 13:47:55,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2303 transitions. [2022-02-16 13:47:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:47:55,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:55,806 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:55,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:56,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:56,007 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash 326252913, now seen corresponding path program 196 times [2022-02-16 13:47:56,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:56,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771233197] [2022-02-16 13:47:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:56,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:56,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:56,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771233197] [2022-02-16 13:47:56,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771233197] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:56,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79497506] [2022-02-16 13:47:56,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:47:56,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:56,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:56,115 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:56,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-16 13:47:56,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:47:56,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:47:56,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:56,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:56,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:47:56,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:56,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:47:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:56,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:56,482 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:47:56,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:47:56,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:47:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:56,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79497506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:56,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:56,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:47:56,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313099887] [2022-02-16 13:47:56,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:56,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:56,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:56,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:56,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:56,499 INFO L87 Difference]: Start difference. First operand 735 states and 2303 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:57,914 INFO L93 Difference]: Finished difference Result 1042 states and 3053 transitions. [2022-02-16 13:47:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 13:47:57,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:47:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:57,916 INFO L225 Difference]: With dead ends: 1042 [2022-02-16 13:47:57,916 INFO L226 Difference]: Without dead ends: 1042 [2022-02-16 13:47:57,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=419, Invalid=2443, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 13:47:57,916 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 117 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:57,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 104 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:47:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-02-16 13:47:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 731. [2022-02-16 13:47:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.132876712328767) internal successors, (2287), 730 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2287 transitions. [2022-02-16 13:47:57,926 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2287 transitions. Word has length 17 [2022-02-16 13:47:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:57,926 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 2287 transitions. [2022-02-16 13:47:57,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2287 transitions. [2022-02-16 13:47:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:47:57,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:57,927 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:57,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:58,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-02-16 13:47:58,143 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:58,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1384360395, now seen corresponding path program 197 times [2022-02-16 13:47:58,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:58,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784047800] [2022-02-16 13:47:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:58,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:58,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:58,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784047800] [2022-02-16 13:47:58,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784047800] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:58,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965411274] [2022-02-16 13:47:58,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:58,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:58,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:58,217 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:58,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-16 13:47:58,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:47:58,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:58,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:47:58,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:58,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:58,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:47:58,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:58,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:47:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:58,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:58,505 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:47:58,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:47:58,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:47:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:58,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965411274] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:58,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:58,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:47:58,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017939010] [2022-02-16 13:47:58,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:58,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:58,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:58,520 INFO L87 Difference]: Start difference. First operand 731 states and 2287 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:59,759 INFO L93 Difference]: Finished difference Result 1045 states and 3096 transitions. [2022-02-16 13:47:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-16 13:47:59,760 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:47:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:59,761 INFO L225 Difference]: With dead ends: 1045 [2022-02-16 13:47:59,761 INFO L226 Difference]: Without dead ends: 1045 [2022-02-16 13:47:59,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:47:59,762 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:59,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 94 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 797 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2022-02-16 13:47:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-02-16 13:47:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 746. [2022-02-16 13:47:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.1328859060402685) internal successors, (2334), 745 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2334 transitions. [2022-02-16 13:47:59,772 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2334 transitions. Word has length 17 [2022-02-16 13:47:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:59,772 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2334 transitions. [2022-02-16 13:47:59,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2334 transitions. [2022-02-16 13:47:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:47:59,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:59,773 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:59,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:59,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:59,973 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:47:59,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1421201905, now seen corresponding path program 198 times [2022-02-16 13:47:59,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:59,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829712995] [2022-02-16 13:47:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:59,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:00,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:00,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829712995] [2022-02-16 13:48:00,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829712995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:00,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618088004] [2022-02-16 13:48:00,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:00,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:00,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:00,088 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:00,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-16 13:48:00,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:48:00,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:00,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:00,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:00,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:00,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:00,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:00,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:00,434 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:48:00,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:48:00,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:48:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:00,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618088004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:00,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:00,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:00,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820295822] [2022-02-16 13:48:00,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:00,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:00,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:00,450 INFO L87 Difference]: Start difference. First operand 746 states and 2334 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:00,864 INFO L93 Difference]: Finished difference Result 1016 states and 3062 transitions. [2022-02-16 13:48:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:48:00,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:00,866 INFO L225 Difference]: With dead ends: 1016 [2022-02-16 13:48:00,866 INFO L226 Difference]: Without dead ends: 1016 [2022-02-16 13:48:00,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:48:00,866 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:00,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 72 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 455 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-02-16 13:48:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-02-16 13:48:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 755. [2022-02-16 13:48:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.129973474801061) internal successors, (2360), 754 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2360 transitions. [2022-02-16 13:48:00,876 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2360 transitions. Word has length 17 [2022-02-16 13:48:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:00,876 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2360 transitions. [2022-02-16 13:48:00,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2360 transitions. [2022-02-16 13:48:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:00,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:00,877 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:00,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-02-16 13:48:01,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-02-16 13:48:01,090 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:01,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:01,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1266244205, now seen corresponding path program 199 times [2022-02-16 13:48:01,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:01,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112148843] [2022-02-16 13:48:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:01,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:01,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:01,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112148843] [2022-02-16 13:48:01,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112148843] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:01,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331399352] [2022-02-16 13:48:01,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:01,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:01,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:01,208 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:01,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-16 13:48:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:01,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:01,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:01,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:01,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:01,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:01,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:01,540 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:48:01,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:48:01,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:48:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:01,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331399352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:01,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:01,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:01,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377055799] [2022-02-16 13:48:01,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:01,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:01,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:01,556 INFO L87 Difference]: Start difference. First operand 755 states and 2360 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:01,996 INFO L93 Difference]: Finished difference Result 1014 states and 3056 transitions. [2022-02-16 13:48:01,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:48:01,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:01,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:01,998 INFO L225 Difference]: With dead ends: 1014 [2022-02-16 13:48:01,998 INFO L226 Difference]: Without dead ends: 1014 [2022-02-16 13:48:01,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:48:01,998 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:01,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 72 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 520 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-02-16 13:48:01,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-02-16 13:48:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 750. [2022-02-16 13:48:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.130841121495327) internal successors, (2345), 749 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2345 transitions. [2022-02-16 13:48:02,008 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2345 transitions. Word has length 17 [2022-02-16 13:48:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:02,008 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2345 transitions. [2022-02-16 13:48:02,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2345 transitions. [2022-02-16 13:48:02,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:02,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:02,009 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:02,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-02-16 13:48:02,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-16 13:48:02,210 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:02,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1800680011, now seen corresponding path program 200 times [2022-02-16 13:48:02,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:02,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597061868] [2022-02-16 13:48:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:02,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:02,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:02,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597061868] [2022-02-16 13:48:02,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597061868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:02,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059283236] [2022-02-16 13:48:02,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:02,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:02,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:02,312 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:02,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-16 13:48:02,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:02,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:02,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:02,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:02,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:02,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:02,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:02,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:02,629 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:48:02,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:48:02,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:48:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:02,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059283236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:02,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:02,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:02,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363229666] [2022-02-16 13:48:02,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:02,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:02,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:02,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:02,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:02,646 INFO L87 Difference]: Start difference. First operand 750 states and 2345 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:02,944 INFO L93 Difference]: Finished difference Result 995 states and 3025 transitions. [2022-02-16 13:48:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:48:02,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:02,945 INFO L225 Difference]: With dead ends: 995 [2022-02-16 13:48:02,945 INFO L226 Difference]: Without dead ends: 995 [2022-02-16 13:48:02,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:48:02,946 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:02,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 74 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 356 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2022-02-16 13:48:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-02-16 13:48:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 753. [2022-02-16 13:48:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.13031914893617) internal successors, (2354), 752 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2354 transitions. [2022-02-16 13:48:02,956 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2354 transitions. Word has length 17 [2022-02-16 13:48:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:02,956 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2354 transitions. [2022-02-16 13:48:02,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2354 transitions. [2022-02-16 13:48:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:02,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:02,957 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:02,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-02-16 13:48:03,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-02-16 13:48:03,173 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:03,173 INFO L85 PathProgramCache]: Analyzing trace with hash -193158825, now seen corresponding path program 201 times [2022-02-16 13:48:03,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:03,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132713122] [2022-02-16 13:48:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:03,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:03,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:03,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132713122] [2022-02-16 13:48:03,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132713122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:03,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205496704] [2022-02-16 13:48:03,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:03,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:03,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:03,284 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:03,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-16 13:48:03,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:48:03,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:03,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:03,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:03,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:03,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:03,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:03,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:03,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:03,623 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:48:03,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:48:03,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:48:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:03,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205496704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:03,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:03,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:03,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129957766] [2022-02-16 13:48:03,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:03,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:03,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:03,640 INFO L87 Difference]: Start difference. First operand 753 states and 2354 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:03,879 INFO L93 Difference]: Finished difference Result 998 states and 3024 transitions. [2022-02-16 13:48:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:48:03,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:03,881 INFO L225 Difference]: With dead ends: 998 [2022-02-16 13:48:03,881 INFO L226 Difference]: Without dead ends: 998 [2022-02-16 13:48:03,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:48:03,881 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:03,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 68 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 417 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2022-02-16 13:48:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-02-16 13:48:03,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 753. [2022-02-16 13:48:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.13031914893617) internal successors, (2354), 752 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2354 transitions. [2022-02-16 13:48:03,890 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2354 transitions. Word has length 17 [2022-02-16 13:48:03,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:03,890 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2354 transitions. [2022-02-16 13:48:03,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:03,891 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2354 transitions. [2022-02-16 13:48:03,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:03,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:03,891 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:03,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:04,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:04,099 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:04,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1535888509, now seen corresponding path program 202 times [2022-02-16 13:48:04,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:04,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744729421] [2022-02-16 13:48:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:04,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:04,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:04,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744729421] [2022-02-16 13:48:04,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744729421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:04,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849665988] [2022-02-16 13:48:04,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:04,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:04,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:04,202 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:04,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-16 13:48:04,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:04,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:04,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:04,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:04,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:04,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:04,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:04,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:04,444 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:48:04,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:48:04,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:48:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:04,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849665988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:04,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:04,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:04,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106623136] [2022-02-16 13:48:04,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:04,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:04,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:04,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:04,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:04,454 INFO L87 Difference]: Start difference. First operand 753 states and 2354 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:04,658 INFO L93 Difference]: Finished difference Result 998 states and 3022 transitions. [2022-02-16 13:48:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:48:04,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:04,659 INFO L225 Difference]: With dead ends: 998 [2022-02-16 13:48:04,659 INFO L226 Difference]: Without dead ends: 998 [2022-02-16 13:48:04,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:48:04,660 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:04,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 60 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 390 Invalid, 0 Unknown, 162 Unchecked, 0.1s Time] [2022-02-16 13:48:04,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-02-16 13:48:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 752. [2022-02-16 13:48:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.130492676431425) internal successors, (2351), 751 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2351 transitions. [2022-02-16 13:48:04,682 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2351 transitions. Word has length 17 [2022-02-16 13:48:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:04,682 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2351 transitions. [2022-02-16 13:48:04,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2351 transitions. [2022-02-16 13:48:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:04,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:04,683 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:04,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:04,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-02-16 13:48:04,906 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1235007863, now seen corresponding path program 203 times [2022-02-16 13:48:04,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:04,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93937165] [2022-02-16 13:48:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:04,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:04,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:04,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93937165] [2022-02-16 13:48:04,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93937165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:04,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704547238] [2022-02-16 13:48:04,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:04,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:04,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:04,967 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:04,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-16 13:48:04,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 13:48:04,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:04,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:04,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:05,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:05,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:05,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:05,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:48:05,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:05,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:48:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:05,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:05,151 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:05,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:48:05,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:48:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:05,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704547238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:05,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:05,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:05,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408656085] [2022-02-16 13:48:05,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:05,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:05,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:05,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:05,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:05,169 INFO L87 Difference]: Start difference. First operand 752 states and 2351 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:05,504 INFO L93 Difference]: Finished difference Result 981 states and 2875 transitions. [2022-02-16 13:48:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:48:05,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:05,506 INFO L225 Difference]: With dead ends: 981 [2022-02-16 13:48:05,506 INFO L226 Difference]: Without dead ends: 981 [2022-02-16 13:48:05,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:48:05,506 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:05,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 156 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-02-16 13:48:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 802. [2022-02-16 13:48:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.15980024968789) internal successors, (2531), 801 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:05,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2531 transitions. [2022-02-16 13:48:05,517 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2531 transitions. Word has length 17 [2022-02-16 13:48:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:05,518 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 2531 transitions. [2022-02-16 13:48:05,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:05,518 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2531 transitions. [2022-02-16 13:48:05,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:05,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:05,519 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:05,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-02-16 13:48:05,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:05,735 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash 315307155, now seen corresponding path program 204 times [2022-02-16 13:48:05,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:05,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297478434] [2022-02-16 13:48:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:05,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:05,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:05,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297478434] [2022-02-16 13:48:05,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297478434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:05,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5448177] [2022-02-16 13:48:05,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:05,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:05,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:05,796 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:05,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-16 13:48:05,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:48:05,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:05,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:05,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:05,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:05,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:48:05,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:05,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:48:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:05,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:05,991 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:05,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:48:05,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:06,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5448177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:06,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:06,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:06,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6757001] [2022-02-16 13:48:06,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:06,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:06,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:06,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:06,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:06,011 INFO L87 Difference]: Start difference. First operand 802 states and 2531 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:06,355 INFO L93 Difference]: Finished difference Result 922 states and 2751 transitions. [2022-02-16 13:48:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:48:06,356 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:06,357 INFO L225 Difference]: With dead ends: 922 [2022-02-16 13:48:06,357 INFO L226 Difference]: Without dead ends: 918 [2022-02-16 13:48:06,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:48:06,358 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:06,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 118 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-02-16 13:48:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 804. [2022-02-16 13:48:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.1457036114570363) internal successors, (2526), 803 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2526 transitions. [2022-02-16 13:48:06,368 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2526 transitions. Word has length 17 [2022-02-16 13:48:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:06,368 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2526 transitions. [2022-02-16 13:48:06,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2526 transitions. [2022-02-16 13:48:06,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:06,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:06,369 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:06,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:06,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-02-16 13:48:06,585 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:06,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1242738261, now seen corresponding path program 205 times [2022-02-16 13:48:06,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:06,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66178272] [2022-02-16 13:48:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:06,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:06,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:06,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66178272] [2022-02-16 13:48:06,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66178272] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:06,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671199630] [2022-02-16 13:48:06,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:06,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:06,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:06,651 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:06,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-16 13:48:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:06,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:06,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:06,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:06,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:06,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:06,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:06,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:06,851 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:06,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:48:06,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:48:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:06,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671199630] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:06,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:06,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:06,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106779759] [2022-02-16 13:48:06,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:06,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:06,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:06,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:06,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:06,870 INFO L87 Difference]: Start difference. First operand 804 states and 2526 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:07,226 INFO L93 Difference]: Finished difference Result 1028 states and 2954 transitions. [2022-02-16 13:48:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:48:07,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:07,227 INFO L225 Difference]: With dead ends: 1028 [2022-02-16 13:48:07,228 INFO L226 Difference]: Without dead ends: 1027 [2022-02-16 13:48:07,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:48:07,228 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 116 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:07,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 120 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-02-16 13:48:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 813. [2022-02-16 13:48:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.1527093596059115) internal successors, (2560), 812 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2560 transitions. [2022-02-16 13:48:07,239 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2560 transitions. Word has length 17 [2022-02-16 13:48:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:07,239 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 2560 transitions. [2022-02-16 13:48:07,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2560 transitions. [2022-02-16 13:48:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:07,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:07,240 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:07,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:07,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:07,453 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2044354489, now seen corresponding path program 206 times [2022-02-16 13:48:07,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:07,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896239273] [2022-02-16 13:48:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:07,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:07,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:07,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896239273] [2022-02-16 13:48:07,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896239273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:07,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693221619] [2022-02-16 13:48:07,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:07,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:07,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:07,520 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:07,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-16 13:48:07,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:07,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:07,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:07,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:07,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:07,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:07,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:07,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:07,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:07,737 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:07,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:48:07,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:07,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693221619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:07,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:07,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:07,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085991836] [2022-02-16 13:48:07,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:07,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:07,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:07,764 INFO L87 Difference]: Start difference. First operand 813 states and 2560 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:08,418 INFO L93 Difference]: Finished difference Result 994 states and 2907 transitions. [2022-02-16 13:48:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:48:08,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:08,419 INFO L225 Difference]: With dead ends: 994 [2022-02-16 13:48:08,419 INFO L226 Difference]: Without dead ends: 991 [2022-02-16 13:48:08,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:48:08,420 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:08,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 118 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:48:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-02-16 13:48:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 827. [2022-02-16 13:48:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.1464891041162226) internal successors, (2599), 826 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2599 transitions. [2022-02-16 13:48:08,430 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2599 transitions. Word has length 17 [2022-02-16 13:48:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:08,430 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 2599 transitions. [2022-02-16 13:48:08,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2599 transitions. [2022-02-16 13:48:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:08,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:08,431 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:08,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-02-16 13:48:08,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-02-16 13:48:08,647 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:08,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:08,647 INFO L85 PathProgramCache]: Analyzing trace with hash -532269101, now seen corresponding path program 207 times [2022-02-16 13:48:08,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:08,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34025739] [2022-02-16 13:48:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:08,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:08,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:08,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34025739] [2022-02-16 13:48:08,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34025739] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:08,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367725308] [2022-02-16 13:48:08,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:08,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:08,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:08,732 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:08,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-16 13:48:08,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:48:08,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:08,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:08,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:08,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:08,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:08,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:08,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:08,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:08,999 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:08,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:48:09,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:09,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367725308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:09,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:09,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:09,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063410280] [2022-02-16 13:48:09,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:09,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:09,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:09,035 INFO L87 Difference]: Start difference. First operand 827 states and 2599 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:09,617 INFO L93 Difference]: Finished difference Result 976 states and 2863 transitions. [2022-02-16 13:48:09,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:48:09,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:09,619 INFO L225 Difference]: With dead ends: 976 [2022-02-16 13:48:09,619 INFO L226 Difference]: Without dead ends: 976 [2022-02-16 13:48:09,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:48:09,619 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:09,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 164 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:48:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-02-16 13:48:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 805. [2022-02-16 13:48:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.1318407960199006) internal successors, (2518), 804 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2518 transitions. [2022-02-16 13:48:09,629 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2518 transitions. Word has length 17 [2022-02-16 13:48:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:09,629 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 2518 transitions. [2022-02-16 13:48:09,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2518 transitions. [2022-02-16 13:48:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:09,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:09,630 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:09,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:09,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:09,831 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:09,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1360854451, now seen corresponding path program 208 times [2022-02-16 13:48:09,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:09,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319466068] [2022-02-16 13:48:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:09,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:09,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:09,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319466068] [2022-02-16 13:48:09,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319466068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:09,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757786103] [2022-02-16 13:48:09,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:09,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:09,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:09,931 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:09,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-16 13:48:09,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:09,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:09,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:09,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:10,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:10,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:10,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:10,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:10,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:10,177 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:10,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:48:10,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:10,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757786103] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:10,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:10,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:10,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977857251] [2022-02-16 13:48:10,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:10,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:10,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:10,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:10,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:10,203 INFO L87 Difference]: Start difference. First operand 805 states and 2518 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:10,966 INFO L93 Difference]: Finished difference Result 996 states and 2876 transitions. [2022-02-16 13:48:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 13:48:10,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:10,968 INFO L225 Difference]: With dead ends: 996 [2022-02-16 13:48:10,968 INFO L226 Difference]: Without dead ends: 993 [2022-02-16 13:48:10,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 13:48:10,969 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 107 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:10,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 184 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:48:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-02-16 13:48:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 821. [2022-02-16 13:48:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.1329268292682926) internal successors, (2569), 820 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:10,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2569 transitions. [2022-02-16 13:48:10,981 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2569 transitions. Word has length 17 [2022-02-16 13:48:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:10,981 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 2569 transitions. [2022-02-16 13:48:10,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:10,981 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2569 transitions. [2022-02-16 13:48:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:10,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:10,982 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:10,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-02-16 13:48:11,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-02-16 13:48:11,183 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1205065511, now seen corresponding path program 209 times [2022-02-16 13:48:11,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:11,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480624832] [2022-02-16 13:48:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:11,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:11,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:11,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480624832] [2022-02-16 13:48:11,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480624832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:11,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744179928] [2022-02-16 13:48:11,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:11,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:11,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:11,281 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:11,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-16 13:48:11,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:48:11,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:11,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:11,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:11,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:11,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:48:11,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:11,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:48:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:11,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:11,582 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:11,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:48:11,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:11,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744179928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:11,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:11,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:11,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576067291] [2022-02-16 13:48:11,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:11,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:11,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:11,621 INFO L87 Difference]: Start difference. First operand 821 states and 2569 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:12,146 INFO L93 Difference]: Finished difference Result 942 states and 2793 transitions. [2022-02-16 13:48:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:48:12,146 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:12,148 INFO L225 Difference]: With dead ends: 942 [2022-02-16 13:48:12,148 INFO L226 Difference]: Without dead ends: 938 [2022-02-16 13:48:12,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:48:12,148 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:12,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 108 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 716 Invalid, 0 Unknown, 15 Unchecked, 0.3s Time] [2022-02-16 13:48:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-02-16 13:48:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 823. [2022-02-16 13:48:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.1204379562043796) internal successors, (2565), 822 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2565 transitions. [2022-02-16 13:48:12,158 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2565 transitions. Word has length 17 [2022-02-16 13:48:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:12,158 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 2565 transitions. [2022-02-16 13:48:12,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2565 transitions. [2022-02-16 13:48:12,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:12,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:12,159 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:12,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-02-16 13:48:12,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-02-16 13:48:12,375 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash 562679891, now seen corresponding path program 210 times [2022-02-16 13:48:12,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:12,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682629453] [2022-02-16 13:48:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:12,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:12,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:12,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682629453] [2022-02-16 13:48:12,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682629453] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:12,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697531367] [2022-02-16 13:48:12,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:12,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:12,470 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:12,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-16 13:48:12,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:48:12,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:12,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:12,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:12,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:12,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:12,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:12,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:12,701 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:12,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:48:12,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:48:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:12,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697531367] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:12,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:12,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:12,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399099143] [2022-02-16 13:48:12,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:12,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:12,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:12,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:12,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:12,722 INFO L87 Difference]: Start difference. First operand 823 states and 2565 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:13,144 INFO L93 Difference]: Finished difference Result 1022 states and 2952 transitions. [2022-02-16 13:48:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:48:13,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:13,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:13,145 INFO L225 Difference]: With dead ends: 1022 [2022-02-16 13:48:13,146 INFO L226 Difference]: Without dead ends: 1022 [2022-02-16 13:48:13,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:48:13,146 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:13,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 126 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 691 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-02-16 13:48:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-02-16 13:48:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 835. [2022-02-16 13:48:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.118705035971223) internal successors, (2601), 834 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2601 transitions. [2022-02-16 13:48:13,156 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2601 transitions. Word has length 17 [2022-02-16 13:48:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:13,156 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 2601 transitions. [2022-02-16 13:48:13,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2601 transitions. [2022-02-16 13:48:13,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:13,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:13,160 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:13,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-02-16 13:48:13,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-02-16 13:48:13,376 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2124766219, now seen corresponding path program 211 times [2022-02-16 13:48:13,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:13,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137426529] [2022-02-16 13:48:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:13,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:13,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:13,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137426529] [2022-02-16 13:48:13,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137426529] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:13,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243310266] [2022-02-16 13:48:13,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:13,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:13,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:13,470 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:13,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-16 13:48:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:13,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:13,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:13,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:13,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:13,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:13,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:13,753 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:13,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:48:13,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:48:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:13,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243310266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:13,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:13,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:13,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775960094] [2022-02-16 13:48:13,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:13,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:13,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:13,780 INFO L87 Difference]: Start difference. First operand 835 states and 2601 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:14,289 INFO L93 Difference]: Finished difference Result 1021 states and 2945 transitions. [2022-02-16 13:48:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:48:14,290 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:14,291 INFO L225 Difference]: With dead ends: 1021 [2022-02-16 13:48:14,291 INFO L226 Difference]: Without dead ends: 1021 [2022-02-16 13:48:14,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:48:14,292 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:14,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 138 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 819 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2022-02-16 13:48:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-02-16 13:48:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 833. [2022-02-16 13:48:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.1165865384615383) internal successors, (2593), 832 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2593 transitions. [2022-02-16 13:48:14,303 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2593 transitions. Word has length 17 [2022-02-16 13:48:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:14,303 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 2593 transitions. [2022-02-16 13:48:14,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2593 transitions. [2022-02-16 13:48:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:14,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:14,304 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:14,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-02-16 13:48:14,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:14,521 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:14,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1861027465, now seen corresponding path program 212 times [2022-02-16 13:48:14,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:14,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330518010] [2022-02-16 13:48:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:14,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:14,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:14,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330518010] [2022-02-16 13:48:14,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330518010] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:14,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893366469] [2022-02-16 13:48:14,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:14,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:14,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:14,627 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:14,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-16 13:48:14,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:14,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:14,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:14,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:14,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:14,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:14,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:14,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:14,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:14,947 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:14,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:14,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:14,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893366469] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:14,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:14,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:14,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808682968] [2022-02-16 13:48:14,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:14,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:14,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:14,977 INFO L87 Difference]: Start difference. First operand 833 states and 2593 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:15,660 INFO L93 Difference]: Finished difference Result 983 states and 2896 transitions. [2022-02-16 13:48:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:48:15,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:15,661 INFO L225 Difference]: With dead ends: 983 [2022-02-16 13:48:15,661 INFO L226 Difference]: Without dead ends: 981 [2022-02-16 13:48:15,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:48:15,662 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:15,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 108 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:48:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-02-16 13:48:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 845. [2022-02-16 13:48:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.1137440758293837) internal successors, (2628), 844 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2628 transitions. [2022-02-16 13:48:15,678 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2628 transitions. Word has length 17 [2022-02-16 13:48:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:15,678 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2628 transitions. [2022-02-16 13:48:15,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2628 transitions. [2022-02-16 13:48:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:15,680 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:15,680 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:15,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-02-16 13:48:15,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-02-16 13:48:15,896 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:15,896 INFO L85 PathProgramCache]: Analyzing trace with hash -131980131, now seen corresponding path program 213 times [2022-02-16 13:48:15,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:15,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842380083] [2022-02-16 13:48:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:15,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:15,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:15,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842380083] [2022-02-16 13:48:15,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842380083] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:16,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058388723] [2022-02-16 13:48:16,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:16,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:16,001 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:16,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-16 13:48:16,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:48:16,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:16,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:16,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:16,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:16,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:48:16,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:16,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:48:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:16,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:16,334 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:16,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:16,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:16,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058388723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:16,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:16,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:16,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709394440] [2022-02-16 13:48:16,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:16,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:16,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:16,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:16,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:16,365 INFO L87 Difference]: Start difference. First operand 845 states and 2628 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:16,717 INFO L93 Difference]: Finished difference Result 927 states and 2804 transitions. [2022-02-16 13:48:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:48:16,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:16,719 INFO L225 Difference]: With dead ends: 927 [2022-02-16 13:48:16,719 INFO L226 Difference]: Without dead ends: 923 [2022-02-16 13:48:16,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:48:16,719 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:16,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 595 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-02-16 13:48:16,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-02-16 13:48:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 845. [2022-02-16 13:48:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.110189573459716) internal successors, (2625), 844 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2625 transitions. [2022-02-16 13:48:16,730 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2625 transitions. Word has length 17 [2022-02-16 13:48:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:16,730 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2625 transitions. [2022-02-16 13:48:16,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2625 transitions. [2022-02-16 13:48:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:16,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:16,732 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:16,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:16,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-02-16 13:48:16,949 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1928879671, now seen corresponding path program 214 times [2022-02-16 13:48:16,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:16,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623459877] [2022-02-16 13:48:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:16,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:17,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:17,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623459877] [2022-02-16 13:48:17,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623459877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:17,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170949924] [2022-02-16 13:48:17,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:17,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:17,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:17,025 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:17,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-16 13:48:17,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:17,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:17,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:17,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:17,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:17,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:48:17,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:17,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:48:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:17,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:17,249 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:17,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:17,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:17,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170949924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:17,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:17,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:17,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034557563] [2022-02-16 13:48:17,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:17,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:17,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:17,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:17,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:17,268 INFO L87 Difference]: Start difference. First operand 845 states and 2625 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:17,448 INFO L93 Difference]: Finished difference Result 925 states and 2799 transitions. [2022-02-16 13:48:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:48:17,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:17,450 INFO L225 Difference]: With dead ends: 925 [2022-02-16 13:48:17,450 INFO L226 Difference]: Without dead ends: 919 [2022-02-16 13:48:17,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:48:17,451 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:17,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 46 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 304 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-02-16 13:48:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-02-16 13:48:17,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 846. [2022-02-16 13:48:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 3.102958579881657) internal successors, (2622), 845 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2622 transitions. [2022-02-16 13:48:17,460 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2622 transitions. Word has length 17 [2022-02-16 13:48:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:17,460 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 2622 transitions. [2022-02-16 13:48:17,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2622 transitions. [2022-02-16 13:48:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:17,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:17,462 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:17,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-02-16 13:48:17,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-02-16 13:48:17,677 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash 146360275, now seen corresponding path program 215 times [2022-02-16 13:48:17,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:17,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863668794] [2022-02-16 13:48:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:17,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:17,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:17,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863668794] [2022-02-16 13:48:17,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863668794] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:17,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555754179] [2022-02-16 13:48:17,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:17,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:17,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:17,769 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:17,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-16 13:48:17,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:48:17,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:17,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:17,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:17,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:17,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:17,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:17,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:17,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:17,956 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:17,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:17,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:17,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555754179] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:17,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:17,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:17,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659965545] [2022-02-16 13:48:17,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:17,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:17,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:17,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:17,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:17,992 INFO L87 Difference]: Start difference. First operand 846 states and 2622 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:18,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:18,261 INFO L93 Difference]: Finished difference Result 952 states and 2852 transitions. [2022-02-16 13:48:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:48:18,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:18,263 INFO L225 Difference]: With dead ends: 952 [2022-02-16 13:48:18,263 INFO L226 Difference]: Without dead ends: 952 [2022-02-16 13:48:18,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:48:18,263 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:18,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 50 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 509 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-02-16 13:48:18,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-02-16 13:48:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 844. [2022-02-16 13:48:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1032028469750887) internal successors, (2616), 843 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2616 transitions. [2022-02-16 13:48:18,273 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2616 transitions. Word has length 17 [2022-02-16 13:48:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:18,273 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 2616 transitions. [2022-02-16 13:48:18,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2616 transitions. [2022-02-16 13:48:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:18,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:18,274 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:18,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-02-16 13:48:18,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-02-16 13:48:18,482 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:18,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash -267672943, now seen corresponding path program 216 times [2022-02-16 13:48:18,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:18,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884339638] [2022-02-16 13:48:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:18,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:18,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:18,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884339638] [2022-02-16 13:48:18,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884339638] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:18,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419667248] [2022-02-16 13:48:18,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:18,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:18,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:18,553 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:18,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-16 13:48:18,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:48:18,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:18,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:18,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:18,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:18,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:18,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:18,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:18,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:18,791 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:18,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:18,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:18,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419667248] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:18,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:18,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:48:18,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975699411] [2022-02-16 13:48:18,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:18,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:18,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:18,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:18,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:18,808 INFO L87 Difference]: Start difference. First operand 844 states and 2616 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:19,011 INFO L93 Difference]: Finished difference Result 974 states and 2878 transitions. [2022-02-16 13:48:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:48:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:19,012 INFO L225 Difference]: With dead ends: 974 [2022-02-16 13:48:19,012 INFO L226 Difference]: Without dead ends: 974 [2022-02-16 13:48:19,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:48:19,013 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 97 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:19,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 92 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-02-16 13:48:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 853. [2022-02-16 13:48:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.106807511737089) internal successors, (2647), 852 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2647 transitions. [2022-02-16 13:48:19,023 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2647 transitions. Word has length 17 [2022-02-16 13:48:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:19,023 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2647 transitions. [2022-02-16 13:48:19,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2647 transitions. [2022-02-16 13:48:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:19,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:19,024 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:19,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:19,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2022-02-16 13:48:19,240 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash 533943285, now seen corresponding path program 217 times [2022-02-16 13:48:19,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:19,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460700088] [2022-02-16 13:48:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:19,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:19,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:19,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460700088] [2022-02-16 13:48:19,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460700088] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:19,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952207318] [2022-02-16 13:48:19,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:19,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:19,329 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:19,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-16 13:48:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:19,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:19,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:19,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:19,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:19,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:19,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:19,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:19,620 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:19,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:19,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:19,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952207318] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:19,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:19,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:19,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728578380] [2022-02-16 13:48:19,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:19,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:19,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:19,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:19,638 INFO L87 Difference]: Start difference. First operand 853 states and 2647 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:21,183 INFO L93 Difference]: Finished difference Result 1020 states and 2958 transitions. [2022-02-16 13:48:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-16 13:48:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:21,185 INFO L225 Difference]: With dead ends: 1020 [2022-02-16 13:48:21,185 INFO L226 Difference]: Without dead ends: 1014 [2022-02-16 13:48:21,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=463, Invalid=3443, Unknown=0, NotChecked=0, Total=3906 [2022-02-16 13:48:21,185 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 121 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:21,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 102 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:48:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-02-16 13:48:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 869. [2022-02-16 13:48:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.108294930875576) internal successors, (2698), 868 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2698 transitions. [2022-02-16 13:48:21,195 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2698 transitions. Word has length 17 [2022-02-16 13:48:21,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:21,195 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2698 transitions. [2022-02-16 13:48:21,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2698 transitions. [2022-02-16 13:48:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:21,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:21,197 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:21,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:21,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:21,411 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2042680305, now seen corresponding path program 218 times [2022-02-16 13:48:21,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:21,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71930743] [2022-02-16 13:48:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:21,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:21,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:21,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71930743] [2022-02-16 13:48:21,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71930743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:21,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460760292] [2022-02-16 13:48:21,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:21,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:21,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:21,508 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:21,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-16 13:48:21,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:21,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:21,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:21,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:21,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:21,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:21,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:21,806 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:21,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:21,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:21,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460760292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:21,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:21,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:21,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089289088] [2022-02-16 13:48:21,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:21,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:21,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:21,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:21,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:21,827 INFO L87 Difference]: Start difference. First operand 869 states and 2698 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:22,762 INFO L93 Difference]: Finished difference Result 1010 states and 2956 transitions. [2022-02-16 13:48:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 13:48:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:22,764 INFO L225 Difference]: With dead ends: 1010 [2022-02-16 13:48:22,764 INFO L226 Difference]: Without dead ends: 1010 [2022-02-16 13:48:22,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 13:48:22,765 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 81 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:22,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 74 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:48:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-02-16 13:48:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 852. [2022-02-16 13:48:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1022326674500587) internal successors, (2640), 851 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2640 transitions. [2022-02-16 13:48:22,775 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2640 transitions. Word has length 17 [2022-02-16 13:48:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:22,775 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2640 transitions. [2022-02-16 13:48:22,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2640 transitions. [2022-02-16 13:48:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:22,776 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:22,776 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:22,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:22,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:22,992 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:22,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash 541673683, now seen corresponding path program 219 times [2022-02-16 13:48:22,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:22,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063953634] [2022-02-16 13:48:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:22,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:23,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:23,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063953634] [2022-02-16 13:48:23,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063953634] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:23,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306400302] [2022-02-16 13:48:23,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:23,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:23,079 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:23,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-16 13:48:23,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:48:23,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:23,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:23,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:23,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:23,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:23,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:23,398 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:23,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:23,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:23,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306400302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:23,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:23,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:23,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296541614] [2022-02-16 13:48:23,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:23,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:23,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:23,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:23,419 INFO L87 Difference]: Start difference. First operand 852 states and 2640 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:24,340 INFO L93 Difference]: Finished difference Result 992 states and 2932 transitions. [2022-02-16 13:48:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:48:24,340 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:24,342 INFO L225 Difference]: With dead ends: 992 [2022-02-16 13:48:24,342 INFO L226 Difference]: Without dead ends: 992 [2022-02-16 13:48:24,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=298, Invalid=1508, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:48:24,342 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 51 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:24,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 50 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 600 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-02-16 13:48:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-02-16 13:48:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 854. [2022-02-16 13:48:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.100820633059789) internal successors, (2645), 853 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2645 transitions. [2022-02-16 13:48:24,352 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2645 transitions. Word has length 17 [2022-02-16 13:48:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:24,352 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 2645 transitions. [2022-02-16 13:48:24,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:24,352 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2645 transitions. [2022-02-16 13:48:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:24,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:24,353 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:24,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-02-16 13:48:24,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-02-16 13:48:24,569 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash -947731313, now seen corresponding path program 220 times [2022-02-16 13:48:24,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:24,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295760517] [2022-02-16 13:48:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:24,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:24,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:24,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295760517] [2022-02-16 13:48:24,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295760517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:24,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150292729] [2022-02-16 13:48:24,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:24,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:24,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:24,675 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:24,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-16 13:48:24,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:24,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:24,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:24,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:24,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:24,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:24,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:24,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:25,005 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:25,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:25,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:25,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150292729] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:25,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:25,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:25,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573451232] [2022-02-16 13:48:25,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:25,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:25,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:25,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:25,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:25,028 INFO L87 Difference]: Start difference. First operand 854 states and 2645 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:25,362 INFO L93 Difference]: Finished difference Result 972 states and 2920 transitions. [2022-02-16 13:48:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:48:25,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:25,364 INFO L225 Difference]: With dead ends: 972 [2022-02-16 13:48:25,364 INFO L226 Difference]: Without dead ends: 972 [2022-02-16 13:48:25,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:48:25,364 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:25,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 50 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 449 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-02-16 13:48:25,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-02-16 13:48:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 854. [2022-02-16 13:48:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.0996483001172335) internal successors, (2644), 853 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2644 transitions. [2022-02-16 13:48:25,374 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2644 transitions. Word has length 17 [2022-02-16 13:48:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:25,374 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 2644 transitions. [2022-02-16 13:48:25,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2644 transitions. [2022-02-16 13:48:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:25,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:25,375 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:25,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:25,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:25,591 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:25,591 INFO L85 PathProgramCache]: Analyzing trace with hash 125354067, now seen corresponding path program 221 times [2022-02-16 13:48:25,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:25,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671355046] [2022-02-16 13:48:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:25,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:25,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:25,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671355046] [2022-02-16 13:48:25,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671355046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:25,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118375388] [2022-02-16 13:48:25,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:25,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:25,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:25,691 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:25,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-16 13:48:25,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:48:25,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:25,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:25,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:25,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:25,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:25,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:25,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:25,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:25,914 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:25,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:25,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:25,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118375388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:25,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:25,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:25,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756672287] [2022-02-16 13:48:25,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:25,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:25,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:25,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:25,928 INFO L87 Difference]: Start difference. First operand 854 states and 2644 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:26,046 INFO L93 Difference]: Finished difference Result 952 states and 2868 transitions. [2022-02-16 13:48:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:48:26,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:26,047 INFO L225 Difference]: With dead ends: 952 [2022-02-16 13:48:26,047 INFO L226 Difference]: Without dead ends: 952 [2022-02-16 13:48:26,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:26,047 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:26,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 56 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 329 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-02-16 13:48:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-02-16 13:48:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 858. [2022-02-16 13:48:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.099183197199533) internal successors, (2656), 857 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2656 transitions. [2022-02-16 13:48:26,058 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2656 transitions. Word has length 17 [2022-02-16 13:48:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:26,058 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 2656 transitions. [2022-02-16 13:48:26,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2656 transitions. [2022-02-16 13:48:26,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:26,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:26,059 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:26,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:26,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-02-16 13:48:26,276 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1732875253, now seen corresponding path program 222 times [2022-02-16 13:48:26,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:26,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403235319] [2022-02-16 13:48:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:26,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:26,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:26,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403235319] [2022-02-16 13:48:26,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403235319] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:26,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021481626] [2022-02-16 13:48:26,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:26,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:26,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:26,373 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:26,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-16 13:48:26,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:48:26,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:26,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:26,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:26,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:26,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:26,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:26,675 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:26,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:26,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:26,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021481626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:26,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:26,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:48:26,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433319789] [2022-02-16 13:48:26,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:26,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:26,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:26,689 INFO L87 Difference]: Start difference. First operand 858 states and 2656 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:26,833 INFO L93 Difference]: Finished difference Result 958 states and 2882 transitions. [2022-02-16 13:48:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:48:26,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:26,835 INFO L225 Difference]: With dead ends: 958 [2022-02-16 13:48:26,835 INFO L226 Difference]: Without dead ends: 958 [2022-02-16 13:48:26,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:26,835 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:26,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 50 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 447 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2022-02-16 13:48:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-02-16 13:48:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 854. [2022-02-16 13:48:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.0996483001172335) internal successors, (2644), 853 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2644 transitions. [2022-02-16 13:48:26,845 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2644 transitions. Word has length 17 [2022-02-16 13:48:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:26,845 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 2644 transitions. [2022-02-16 13:48:26,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2644 transitions. [2022-02-16 13:48:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:26,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:26,846 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:26,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-02-16 13:48:27,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-02-16 13:48:27,062 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:27,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:27,064 INFO L85 PathProgramCache]: Analyzing trace with hash 150986867, now seen corresponding path program 223 times [2022-02-16 13:48:27,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:27,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660826151] [2022-02-16 13:48:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:27,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:27,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:27,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660826151] [2022-02-16 13:48:27,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660826151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:27,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995654320] [2022-02-16 13:48:27,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:27,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:27,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:27,131 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:27,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-16 13:48:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:27,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:27,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:27,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:27,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:27,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:27,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:48:27,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:27,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:48:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:27,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:27,332 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:27,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:27,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:27,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995654320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:27,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:27,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:27,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286187779] [2022-02-16 13:48:27,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:27,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:27,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:27,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:27,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:27,348 INFO L87 Difference]: Start difference. First operand 854 states and 2644 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:27,616 INFO L93 Difference]: Finished difference Result 1019 states and 2980 transitions. [2022-02-16 13:48:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:48:27,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:27,617 INFO L225 Difference]: With dead ends: 1019 [2022-02-16 13:48:27,617 INFO L226 Difference]: Without dead ends: 1019 [2022-02-16 13:48:27,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:48:27,617 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:27,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 150 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-02-16 13:48:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 880. [2022-02-16 13:48:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.1194539249146755) internal successors, (2742), 879 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2742 transitions. [2022-02-16 13:48:27,628 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2742 transitions. Word has length 17 [2022-02-16 13:48:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:27,628 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 2742 transitions. [2022-02-16 13:48:27,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2742 transitions. [2022-02-16 13:48:27,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:27,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:27,629 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:27,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:27,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:27,842 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:27,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:27,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1705035991, now seen corresponding path program 224 times [2022-02-16 13:48:27,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:27,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409493427] [2022-02-16 13:48:27,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:27,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:27,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:27,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409493427] [2022-02-16 13:48:27,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409493427] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:27,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757459308] [2022-02-16 13:48:27,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:27,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:27,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:27,907 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:27,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-16 13:48:27,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:27,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:27,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:27,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:28,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:48:28,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:28,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:48:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:28,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:28,114 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:28,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:28,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:28,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757459308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:28,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:28,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:28,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669164195] [2022-02-16 13:48:28,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:28,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:28,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:28,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:28,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:28,134 INFO L87 Difference]: Start difference. First operand 880 states and 2742 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:28,464 INFO L93 Difference]: Finished difference Result 966 states and 2872 transitions. [2022-02-16 13:48:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:48:28,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:28,466 INFO L225 Difference]: With dead ends: 966 [2022-02-16 13:48:28,466 INFO L226 Difference]: Without dead ends: 960 [2022-02-16 13:48:28,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:48:28,466 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:28,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 128 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-02-16 13:48:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 884. [2022-02-16 13:48:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.1064552661381652) internal successors, (2743), 883 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2743 transitions. [2022-02-16 13:48:28,477 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2743 transitions. Word has length 17 [2022-02-16 13:48:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:28,477 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 2743 transitions. [2022-02-16 13:48:28,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:28,477 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2743 transitions. [2022-02-16 13:48:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:28,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:28,478 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:28,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:28,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:28,694 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:28,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:28,694 INFO L85 PathProgramCache]: Analyzing trace with hash 390629205, now seen corresponding path program 225 times [2022-02-16 13:48:28,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:28,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383660182] [2022-02-16 13:48:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:28,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:28,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:28,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383660182] [2022-02-16 13:48:28,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383660182] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:28,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277918114] [2022-02-16 13:48:28,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:28,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:28,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:28,765 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:28,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-16 13:48:28,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:48:28,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:28,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:28,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:28,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:28,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:28,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:28,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:48:28,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:28,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:48:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:28,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:28,998 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:28,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:28,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:29,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277918114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:29,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:29,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:29,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350603346] [2022-02-16 13:48:29,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:29,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:29,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:29,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:29,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:29,014 INFO L87 Difference]: Start difference. First operand 884 states and 2743 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:29,709 INFO L93 Difference]: Finished difference Result 1107 states and 3200 transitions. [2022-02-16 13:48:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:48:29,710 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:29,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:29,711 INFO L225 Difference]: With dead ends: 1107 [2022-02-16 13:48:29,711 INFO L226 Difference]: Without dead ends: 1103 [2022-02-16 13:48:29,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 13:48:29,712 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:29,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 98 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-02-16 13:48:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 912. [2022-02-16 13:48:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.1218441273326016) internal successors, (2844), 911 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2844 transitions. [2022-02-16 13:48:29,723 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2844 transitions. Word has length 17 [2022-02-16 13:48:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:29,723 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2844 transitions. [2022-02-16 13:48:29,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2844 transitions. [2022-02-16 13:48:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:29,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:29,724 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:29,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:29,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:29,940 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash -529071503, now seen corresponding path program 226 times [2022-02-16 13:48:29,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:29,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796951420] [2022-02-16 13:48:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:29,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:30,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:30,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796951420] [2022-02-16 13:48:30,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796951420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:30,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151689488] [2022-02-16 13:48:30,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:30,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:30,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:30,007 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:30,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-16 13:48:30,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:30,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:30,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:30,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:48:30,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:30,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:48:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:30,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:30,262 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:30,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:30,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:30,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151689488] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:30,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:30,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:30,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578839925] [2022-02-16 13:48:30,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:30,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:30,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:30,286 INFO L87 Difference]: Start difference. First operand 912 states and 2844 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:30,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:30,786 INFO L93 Difference]: Finished difference Result 995 states and 2978 transitions. [2022-02-16 13:48:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:48:30,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:30,788 INFO L225 Difference]: With dead ends: 995 [2022-02-16 13:48:30,788 INFO L226 Difference]: Without dead ends: 989 [2022-02-16 13:48:30,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:48:30,789 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:30,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 90 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-02-16 13:48:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 916. [2022-02-16 13:48:30,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.1038251366120218) internal successors, (2840), 915 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 2840 transitions. [2022-02-16 13:48:30,802 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 2840 transitions. Word has length 17 [2022-02-16 13:48:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:30,802 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 2840 transitions. [2022-02-16 13:48:30,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 2840 transitions. [2022-02-16 13:48:30,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:30,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:30,803 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:30,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:31,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-02-16 13:48:31,019 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:31,019 INFO L85 PathProgramCache]: Analyzing trace with hash 398359603, now seen corresponding path program 227 times [2022-02-16 13:48:31,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:31,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565527562] [2022-02-16 13:48:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:31,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:31,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:31,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565527562] [2022-02-16 13:48:31,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565527562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:31,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763064375] [2022-02-16 13:48:31,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:31,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:31,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:31,108 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:31,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-16 13:48:31,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 13:48:31,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:31,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:31,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:31,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:31,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:31,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:31,442 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:31,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:31,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:31,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763064375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:31,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:31,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:31,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723378075] [2022-02-16 13:48:31,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:31,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:31,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:31,466 INFO L87 Difference]: Start difference. First operand 916 states and 2840 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:32,480 INFO L93 Difference]: Finished difference Result 1155 states and 3239 transitions. [2022-02-16 13:48:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 13:48:32,480 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:32,482 INFO L225 Difference]: With dead ends: 1155 [2022-02-16 13:48:32,482 INFO L226 Difference]: Without dead ends: 1153 [2022-02-16 13:48:32,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=320, Invalid=2032, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:48:32,483 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 190 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:32,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 96 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:48:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-02-16 13:48:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 916. [2022-02-16 13:48:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.1081967213114754) internal successors, (2844), 915 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 2844 transitions. [2022-02-16 13:48:32,494 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 2844 transitions. Word has length 17 [2022-02-16 13:48:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:32,495 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 2844 transitions. [2022-02-16 13:48:32,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 2844 transitions. [2022-02-16 13:48:32,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:32,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:32,496 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:32,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:32,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:32,712 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1199975831, now seen corresponding path program 228 times [2022-02-16 13:48:32,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:32,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861656615] [2022-02-16 13:48:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:32,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:32,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:32,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861656615] [2022-02-16 13:48:32,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861656615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:32,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515550790] [2022-02-16 13:48:32,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:32,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:32,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:32,786 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:32,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-16 13:48:32,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:48:32,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:32,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:32,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:32,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:32,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:32,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:32,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:33,027 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:33,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:33,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:33,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515550790] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:33,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:33,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:48:33,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719616291] [2022-02-16 13:48:33,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:33,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:33,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:33,046 INFO L87 Difference]: Start difference. First operand 916 states and 2844 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:33,496 INFO L93 Difference]: Finished difference Result 1063 states and 3095 transitions. [2022-02-16 13:48:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 13:48:33,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:33,497 INFO L225 Difference]: With dead ends: 1063 [2022-02-16 13:48:33,498 INFO L226 Difference]: Without dead ends: 1059 [2022-02-16 13:48:33,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:48:33,498 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 184 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:33,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 88 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-02-16 13:48:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 929. [2022-02-16 13:48:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.101293103448276) internal successors, (2878), 928 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2878 transitions. [2022-02-16 13:48:33,509 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2878 transitions. Word has length 17 [2022-02-16 13:48:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:33,509 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 2878 transitions. [2022-02-16 13:48:33,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2878 transitions. [2022-02-16 13:48:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:33,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:33,510 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:33,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:33,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:33,715 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:33,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1376647759, now seen corresponding path program 229 times [2022-02-16 13:48:33,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:33,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691501291] [2022-02-16 13:48:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:33,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:33,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:33,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691501291] [2022-02-16 13:48:33,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691501291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:33,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864843392] [2022-02-16 13:48:33,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:33,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:33,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:33,819 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:33,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-16 13:48:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:33,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:33,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:33,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:33,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:33,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:33,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:33,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:34,043 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:34,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:34,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:34,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864843392] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:34,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:34,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:34,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718008821] [2022-02-16 13:48:34,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:34,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:34,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:34,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:34,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:34,063 INFO L87 Difference]: Start difference. First operand 929 states and 2878 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:34,631 INFO L93 Difference]: Finished difference Result 1041 states and 3042 transitions. [2022-02-16 13:48:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:48:34,632 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:34,633 INFO L225 Difference]: With dead ends: 1041 [2022-02-16 13:48:34,633 INFO L226 Difference]: Without dead ends: 1041 [2022-02-16 13:48:34,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:48:34,633 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:34,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 134 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:48:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-02-16 13:48:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 896. [2022-02-16 13:48:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.081564245810056) internal successors, (2758), 895 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2758 transitions. [2022-02-16 13:48:34,644 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2758 transitions. Word has length 17 [2022-02-16 13:48:34,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:34,644 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2758 transitions. [2022-02-16 13:48:34,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2758 transitions. [2022-02-16 13:48:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:34,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:34,646 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:34,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-02-16 13:48:34,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:34,855 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:34,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1216001127, now seen corresponding path program 230 times [2022-02-16 13:48:34,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:34,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040151473] [2022-02-16 13:48:34,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:34,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:48:34,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:34,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040151473] [2022-02-16 13:48:34,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040151473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:34,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290327655] [2022-02-16 13:48:34,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:34,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:34,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:34,942 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:34,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-16 13:48:34,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:34,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:34,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:34,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:35,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:35,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:35,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:35,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:35,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:35,212 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:35,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:48:35,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:48:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:48:35,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290327655] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:35,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:35,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:48:35,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701826815] [2022-02-16 13:48:35,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:35,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:35,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:35,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:35,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:35,235 INFO L87 Difference]: Start difference. First operand 896 states and 2758 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:35,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:35,968 INFO L93 Difference]: Finished difference Result 1015 states and 2966 transitions. [2022-02-16 13:48:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 13:48:35,968 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:35,969 INFO L225 Difference]: With dead ends: 1015 [2022-02-16 13:48:35,969 INFO L226 Difference]: Without dead ends: 1013 [2022-02-16 13:48:35,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=2080, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:48:35,970 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 91 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:35,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 62 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:48:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-02-16 13:48:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 896. [2022-02-16 13:48:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.071508379888268) internal successors, (2749), 895 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2749 transitions. [2022-02-16 13:48:35,981 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2749 transitions. Word has length 17 [2022-02-16 13:48:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:35,981 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2749 transitions. [2022-02-16 13:48:35,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2749 transitions. [2022-02-16 13:48:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:35,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:35,983 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:36,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-02-16 13:48:36,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-02-16 13:48:36,203 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash -17960013, now seen corresponding path program 231 times [2022-02-16 13:48:36,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:36,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754757434] [2022-02-16 13:48:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:36,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:36,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:36,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754757434] [2022-02-16 13:48:36,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754757434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:36,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225162258] [2022-02-16 13:48:36,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:36,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:36,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:36,306 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:36,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-16 13:48:36,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:48:36,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:36,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:36,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:36,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:36,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:36,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:36,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:36,594 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:36,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:48:36,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:36,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225162258] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:36,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:36,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:48:36,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784124389] [2022-02-16 13:48:36,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:36,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:36,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:36,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:36,628 INFO L87 Difference]: Start difference. First operand 896 states and 2749 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:37,126 INFO L93 Difference]: Finished difference Result 987 states and 2893 transitions. [2022-02-16 13:48:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:48:37,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:37,128 INFO L225 Difference]: With dead ends: 987 [2022-02-16 13:48:37,128 INFO L226 Difference]: Without dead ends: 983 [2022-02-16 13:48:37,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:48:37,128 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 119 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:37,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 48 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-02-16 13:48:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 887. [2022-02-16 13:48:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.059819413092551) internal successors, (2711), 886 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2711 transitions. [2022-02-16 13:48:37,139 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2711 transitions. Word has length 17 [2022-02-16 13:48:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:37,139 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2711 transitions. [2022-02-16 13:48:37,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2711 transitions. [2022-02-16 13:48:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:37,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:37,140 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:37,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:37,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-02-16 13:48:37,355 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:37,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash 783656215, now seen corresponding path program 232 times [2022-02-16 13:48:37,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:37,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340417811] [2022-02-16 13:48:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:37,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:37,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:37,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340417811] [2022-02-16 13:48:37,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340417811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:37,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224351085] [2022-02-16 13:48:37,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:37,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:37,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:37,452 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:37,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-16 13:48:37,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:37,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:37,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:37,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:37,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:37,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:37,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:37,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:37,736 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:37,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:48:37,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:48:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:37,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224351085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:37,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:37,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:48:37,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749601041] [2022-02-16 13:48:37,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:37,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:37,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:37,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:37,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:37,764 INFO L87 Difference]: Start difference. First operand 887 states and 2711 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:38,372 INFO L93 Difference]: Finished difference Result 1011 states and 2961 transitions. [2022-02-16 13:48:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-16 13:48:38,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:38,374 INFO L225 Difference]: With dead ends: 1011 [2022-02-16 13:48:38,374 INFO L226 Difference]: Without dead ends: 1007 [2022-02-16 13:48:38,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:48:38,374 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 82 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:38,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 40 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-02-16 13:48:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 903. [2022-02-16 13:48:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.0543237250554323) internal successors, (2755), 902 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2755 transitions. [2022-02-16 13:48:38,385 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2755 transitions. Word has length 17 [2022-02-16 13:48:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:38,385 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 2755 transitions. [2022-02-16 13:48:38,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2755 transitions. [2022-02-16 13:48:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:38,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:38,387 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:38,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-02-16 13:48:38,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-02-16 13:48:38,602 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:38,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1792967375, now seen corresponding path program 233 times [2022-02-16 13:48:38,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:38,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624906110] [2022-02-16 13:48:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:38,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:38,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:38,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624906110] [2022-02-16 13:48:38,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624906110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:38,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783058468] [2022-02-16 13:48:38,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:38,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:38,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:38,706 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:38,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-16 13:48:38,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 13:48:38,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:38,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:38,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:38,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:38,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:38,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:38,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:38,981 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:38,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:48:38,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:48:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:39,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783058468] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:39,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:39,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:48:39,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179010399] [2022-02-16 13:48:39,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:39,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:39,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:39,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:39,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:39,009 INFO L87 Difference]: Start difference. First operand 903 states and 2755 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:39,451 INFO L93 Difference]: Finished difference Result 1006 states and 2942 transitions. [2022-02-16 13:48:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:48:39,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:39,453 INFO L225 Difference]: With dead ends: 1006 [2022-02-16 13:48:39,453 INFO L226 Difference]: Without dead ends: 1005 [2022-02-16 13:48:39,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:48:39,453 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:39,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 46 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-02-16 13:48:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 885. [2022-02-16 13:48:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.0407239819004523) internal successors, (2688), 884 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2688 transitions. [2022-02-16 13:48:39,464 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2688 transitions. Word has length 17 [2022-02-16 13:48:39,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:39,464 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 2688 transitions. [2022-02-16 13:48:39,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:39,464 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2688 transitions. [2022-02-16 13:48:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:39,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:39,465 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:39,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-02-16 13:48:39,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-02-16 13:48:39,665 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash 791386613, now seen corresponding path program 234 times [2022-02-16 13:48:39,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:39,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785499664] [2022-02-16 13:48:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:39,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:39,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:39,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785499664] [2022-02-16 13:48:39,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785499664] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:39,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113829368] [2022-02-16 13:48:39,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:39,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:39,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:39,728 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:39,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-16 13:48:39,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:48:39,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:39,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:39,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:39,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:39,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:39,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:39,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:39,950 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:48:39,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:48:39,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:48:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:39,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113829368] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:39,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:39,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:48:39,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564501401] [2022-02-16 13:48:39,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:39,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:39,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:39,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:39,977 INFO L87 Difference]: Start difference. First operand 885 states and 2688 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:40,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:40,299 INFO L93 Difference]: Finished difference Result 958 states and 2834 transitions. [2022-02-16 13:48:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:48:40,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:40,301 INFO L225 Difference]: With dead ends: 958 [2022-02-16 13:48:40,301 INFO L226 Difference]: Without dead ends: 958 [2022-02-16 13:48:40,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:48:40,301 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:40,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 54 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 577 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-02-16 13:48:40,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-02-16 13:48:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 870. [2022-02-16 13:48:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.040276179516686) internal successors, (2642), 869 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2642 transitions. [2022-02-16 13:48:40,311 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2642 transitions. Word has length 17 [2022-02-16 13:48:40,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:40,312 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 2642 transitions. [2022-02-16 13:48:40,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2642 transitions. [2022-02-16 13:48:40,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:40,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:40,313 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:40,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-02-16 13:48:40,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:40,520 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:40,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:40,520 INFO L85 PathProgramCache]: Analyzing trace with hash -38966221, now seen corresponding path program 235 times [2022-02-16 13:48:40,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:40,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067896158] [2022-02-16 13:48:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:40,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:40,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:40,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067896158] [2022-02-16 13:48:40,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067896158] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:40,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748391805] [2022-02-16 13:48:40,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:40,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:40,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:40,598 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:40,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-16 13:48:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:40,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:40,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:40,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:40,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:40,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:40,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:40,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:40,857 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:40,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:40,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:40,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748391805] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:40,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:40,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:48:40,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274116077] [2022-02-16 13:48:40,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:40,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:40,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:40,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:40,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:40,880 INFO L87 Difference]: Start difference. First operand 870 states and 2642 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:41,253 INFO L93 Difference]: Finished difference Result 1001 states and 2880 transitions. [2022-02-16 13:48:41,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:48:41,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:41,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:41,255 INFO L225 Difference]: With dead ends: 1001 [2022-02-16 13:48:41,255 INFO L226 Difference]: Without dead ends: 999 [2022-02-16 13:48:41,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:48:41,255 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 108 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:41,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 70 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-02-16 13:48:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 887. [2022-02-16 13:48:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.04627539503386) internal successors, (2699), 886 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2699 transitions. [2022-02-16 13:48:41,266 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2699 transitions. Word has length 17 [2022-02-16 13:48:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:41,266 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2699 transitions. [2022-02-16 13:48:41,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2699 transitions. [2022-02-16 13:48:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:41,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:41,267 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:41,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-02-16 13:48:41,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:41,483 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash 762650007, now seen corresponding path program 236 times [2022-02-16 13:48:41,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:41,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765801879] [2022-02-16 13:48:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:41,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:41,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:41,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765801879] [2022-02-16 13:48:41,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765801879] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:41,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589201609] [2022-02-16 13:48:41,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:41,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:41,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:41,551 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:41,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-16 13:48:41,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:41,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:41,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:41,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:41,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:41,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:41,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:41,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:41,765 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:41,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:41,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:41,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589201609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:41,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:41,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:48:41,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534714794] [2022-02-16 13:48:41,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:41,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:41,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:41,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:41,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:41,780 INFO L87 Difference]: Start difference. First operand 887 states and 2699 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:42,531 INFO L93 Difference]: Finished difference Result 1090 states and 3107 transitions. [2022-02-16 13:48:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 13:48:42,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:42,533 INFO L225 Difference]: With dead ends: 1090 [2022-02-16 13:48:42,533 INFO L226 Difference]: Without dead ends: 1083 [2022-02-16 13:48:42,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 13:48:42,533 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 105 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:42,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 68 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-02-16 13:48:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 912. [2022-02-16 13:48:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.0515916575192095) internal successors, (2780), 911 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2780 transitions. [2022-02-16 13:48:42,544 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2780 transitions. Word has length 17 [2022-02-16 13:48:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:42,544 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2780 transitions. [2022-02-16 13:48:42,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2780 transitions. [2022-02-16 13:48:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:42,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:42,559 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:42,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:42,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-02-16 13:48:42,771 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:42,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1813973583, now seen corresponding path program 237 times [2022-02-16 13:48:42,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:42,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015977525] [2022-02-16 13:48:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:42,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:42,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:42,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015977525] [2022-02-16 13:48:42,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015977525] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:42,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791384254] [2022-02-16 13:48:42,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:42,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:42,827 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:42,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-16 13:48:42,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:48:42,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:42,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:42,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:42,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:42,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:42,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:42,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:43,043 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:43,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:43,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:43,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791384254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:43,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:43,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:48:43,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690332652] [2022-02-16 13:48:43,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:43,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:43,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:43,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:43,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:43,059 INFO L87 Difference]: Start difference. First operand 912 states and 2780 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:43,632 INFO L93 Difference]: Finished difference Result 1086 states and 3082 transitions. [2022-02-16 13:48:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-16 13:48:43,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:43,634 INFO L225 Difference]: With dead ends: 1086 [2022-02-16 13:48:43,634 INFO L226 Difference]: Without dead ends: 1084 [2022-02-16 13:48:43,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1536, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:48:43,634 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 49 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:43,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 52 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-02-16 13:48:43,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 888. [2022-02-16 13:48:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.0270574971815107) internal successors, (2685), 887 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2685 transitions. [2022-02-16 13:48:43,645 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2685 transitions. Word has length 17 [2022-02-16 13:48:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:43,645 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 2685 transitions. [2022-02-16 13:48:43,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2685 transitions. [2022-02-16 13:48:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:43,646 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:43,646 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:43,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:43,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:43,859 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:43,859 INFO L85 PathProgramCache]: Analyzing trace with hash 770380405, now seen corresponding path program 238 times [2022-02-16 13:48:43,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:43,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084473584] [2022-02-16 13:48:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:43,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:43,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:43,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084473584] [2022-02-16 13:48:43,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084473584] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:43,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434385832] [2022-02-16 13:48:43,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:43,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:43,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:43,916 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:43,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-16 13:48:43,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:43,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:43,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:44,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:44,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:44,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:44,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:44,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:44,117 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:44,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:44,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:44,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434385832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:44,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:44,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:48:44,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327359922] [2022-02-16 13:48:44,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:44,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:44,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:44,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:44,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:44,133 INFO L87 Difference]: Start difference. First operand 888 states and 2685 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:44,564 INFO L93 Difference]: Finished difference Result 1011 states and 2925 transitions. [2022-02-16 13:48:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:48:44,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:44,566 INFO L225 Difference]: With dead ends: 1011 [2022-02-16 13:48:44,566 INFO L226 Difference]: Without dead ends: 1011 [2022-02-16 13:48:44,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:48:44,566 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:44,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 50 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 610 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-02-16 13:48:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-02-16 13:48:44,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 882. [2022-02-16 13:48:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.0249716231555053) internal successors, (2665), 881 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2665 transitions. [2022-02-16 13:48:44,577 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2665 transitions. Word has length 17 [2022-02-16 13:48:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:44,577 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2665 transitions. [2022-02-16 13:48:44,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2665 transitions. [2022-02-16 13:48:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:44,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:44,578 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:44,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:44,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:44,782 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:44,782 INFO L85 PathProgramCache]: Analyzing trace with hash -719024591, now seen corresponding path program 239 times [2022-02-16 13:48:44,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:44,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172086240] [2022-02-16 13:48:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:44,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:44,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:44,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172086240] [2022-02-16 13:48:44,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172086240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:44,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429425197] [2022-02-16 13:48:44,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:44,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:44,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:44,868 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:44,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-16 13:48:44,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:48:44,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:44,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:44,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:45,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:45,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:45,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:45,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:45,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:45,127 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:45,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:45,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:45,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429425197] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:45,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:45,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:48:45,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241458076] [2022-02-16 13:48:45,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:45,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:45,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:45,151 INFO L87 Difference]: Start difference. First operand 882 states and 2665 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:45,348 INFO L93 Difference]: Finished difference Result 960 states and 2824 transitions. [2022-02-16 13:48:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:48:45,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:45,349 INFO L225 Difference]: With dead ends: 960 [2022-02-16 13:48:45,349 INFO L226 Difference]: Without dead ends: 960 [2022-02-16 13:48:45,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:45,349 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:45,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 36 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 391 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-02-16 13:48:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-02-16 13:48:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 878. [2022-02-16 13:48:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.023945267958951) internal successors, (2652), 877 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2652 transitions. [2022-02-16 13:48:45,359 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2652 transitions. Word has length 17 [2022-02-16 13:48:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:45,359 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 2652 transitions. [2022-02-16 13:48:45,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2652 transitions. [2022-02-16 13:48:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:45,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:45,360 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:45,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-02-16 13:48:45,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:45,576 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:45,577 INFO L85 PathProgramCache]: Analyzing trace with hash -690158669, now seen corresponding path program 240 times [2022-02-16 13:48:45,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:45,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900695458] [2022-02-16 13:48:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:45,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:45,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:45,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900695458] [2022-02-16 13:48:45,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900695458] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:45,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196635226] [2022-02-16 13:48:45,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:45,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:45,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:45,684 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:45,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-16 13:48:45,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:48:45,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:45,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:45,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:45,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:45,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:45,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:45,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:45,956 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:45,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:45,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:45,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196635226] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:45,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:45,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:48:45,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34012233] [2022-02-16 13:48:45,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:45,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:48:45,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:45,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:48:45,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:45,978 INFO L87 Difference]: Start difference. First operand 878 states and 2652 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:46,310 INFO L93 Difference]: Finished difference Result 1016 states and 2901 transitions. [2022-02-16 13:48:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:48:46,310 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:46,312 INFO L225 Difference]: With dead ends: 1016 [2022-02-16 13:48:46,312 INFO L226 Difference]: Without dead ends: 1016 [2022-02-16 13:48:46,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:48:46,312 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 122 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:46,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 100 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-02-16 13:48:46,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 900. [2022-02-16 13:48:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.0300333704115685) internal successors, (2724), 899 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2724 transitions. [2022-02-16 13:48:46,323 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2724 transitions. Word has length 17 [2022-02-16 13:48:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:46,323 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2724 transitions. [2022-02-16 13:48:46,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2724 transitions. [2022-02-16 13:48:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:46,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:46,324 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:46,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:46,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:46,539 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash 111457559, now seen corresponding path program 241 times [2022-02-16 13:48:46,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:46,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118351143] [2022-02-16 13:48:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:46,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:46,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:46,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118351143] [2022-02-16 13:48:46,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118351143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:46,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224889855] [2022-02-16 13:48:46,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:46,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:46,654 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:46,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-16 13:48:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:46,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:46,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:46,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:46,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:46,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:46,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:46,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:47,035 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:47,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:47,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:47,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224889855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:47,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:47,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:48:47,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204800581] [2022-02-16 13:48:47,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:47,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:47,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:47,057 INFO L87 Difference]: Start difference. First operand 900 states and 2724 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:48,313 INFO L93 Difference]: Finished difference Result 1064 states and 3006 transitions. [2022-02-16 13:48:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-16 13:48:48,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:48,315 INFO L225 Difference]: With dead ends: 1064 [2022-02-16 13:48:48,315 INFO L226 Difference]: Without dead ends: 1058 [2022-02-16 13:48:48,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=423, Invalid=2999, Unknown=0, NotChecked=0, Total=3422 [2022-02-16 13:48:48,315 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 140 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:48,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 88 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:48:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-02-16 13:48:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 921. [2022-02-16 13:48:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.033695652173913) internal successors, (2791), 920 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2791 transitions. [2022-02-16 13:48:48,326 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2791 transitions. Word has length 17 [2022-02-16 13:48:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:48,326 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 2791 transitions. [2022-02-16 13:48:48,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2791 transitions. [2022-02-16 13:48:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:48,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:48,327 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:48,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:48,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-02-16 13:48:48,543 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1829801265, now seen corresponding path program 242 times [2022-02-16 13:48:48,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:48,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586105830] [2022-02-16 13:48:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:48,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:48,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:48,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586105830] [2022-02-16 13:48:48,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586105830] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:48,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005427453] [2022-02-16 13:48:48,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:48,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:48,632 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:48,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-16 13:48:48,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:48,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:48,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:48,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:48,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:48:48,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:48,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:48:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:48,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:48,953 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:48,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:48,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:48,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005427453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:48,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:48,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:48:48,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493449707] [2022-02-16 13:48:48,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:48,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:48,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:48,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:48,980 INFO L87 Difference]: Start difference. First operand 921 states and 2791 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:50,010 INFO L93 Difference]: Finished difference Result 1059 states and 3012 transitions. [2022-02-16 13:48:50,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:48:50,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:50,013 INFO L225 Difference]: With dead ends: 1059 [2022-02-16 13:48:50,013 INFO L226 Difference]: Without dead ends: 1059 [2022-02-16 13:48:50,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=324, Invalid=2028, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:48:50,014 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 85 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:50,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 66 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:48:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-02-16 13:48:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 902. [2022-02-16 13:48:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.02330743618202) internal successors, (2724), 901 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2724 transitions. [2022-02-16 13:48:50,025 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2724 transitions. Word has length 17 [2022-02-16 13:48:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:50,025 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 2724 transitions. [2022-02-16 13:48:50,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2724 transitions. [2022-02-16 13:48:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:50,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:50,026 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:50,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:50,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-02-16 13:48:50,239 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash 119187957, now seen corresponding path program 243 times [2022-02-16 13:48:50,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:50,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971385420] [2022-02-16 13:48:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:50,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:50,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:50,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971385420] [2022-02-16 13:48:50,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971385420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:50,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144515364] [2022-02-16 13:48:50,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:50,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:50,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:50,314 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:50,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-16 13:48:50,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:48:50,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:50,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:50,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:50,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:50,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:50,571 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:50,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:50,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:50,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144515364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:50,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:50,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:48:50,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294640250] [2022-02-16 13:48:50,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:50,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:50,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:50,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:50,586 INFO L87 Difference]: Start difference. First operand 902 states and 2724 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:51,312 INFO L93 Difference]: Finished difference Result 1032 states and 2971 transitions. [2022-02-16 13:48:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 13:48:51,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:51,314 INFO L225 Difference]: With dead ends: 1032 [2022-02-16 13:48:51,314 INFO L226 Difference]: Without dead ends: 1032 [2022-02-16 13:48:51,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=1922, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 13:48:51,315 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:51,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 60 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 783 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-02-16 13:48:51,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-02-16 13:48:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 903. [2022-02-16 13:48:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.0199556541019956) internal successors, (2724), 902 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2724 transitions. [2022-02-16 13:48:51,326 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2724 transitions. Word has length 17 [2022-02-16 13:48:51,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:51,326 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 2724 transitions. [2022-02-16 13:48:51,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2724 transitions. [2022-02-16 13:48:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:51,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:51,327 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:51,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:51,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:51,543 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:51,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1726709143, now seen corresponding path program 244 times [2022-02-16 13:48:51,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:51,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646110577] [2022-02-16 13:48:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:51,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:51,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:51,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646110577] [2022-02-16 13:48:51,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646110577] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:51,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618781885] [2022-02-16 13:48:51,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:51,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:51,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:51,653 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:51,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-16 13:48:51,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:51,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:51,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:51,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:51,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:51,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:51,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:51,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:52,022 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:52,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:52,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:52,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618781885] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:52,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:52,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:48:52,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512583586] [2022-02-16 13:48:52,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:52,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:52,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:52,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:52,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:52,045 INFO L87 Difference]: Start difference. First operand 903 states and 2724 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:53,011 INFO L93 Difference]: Finished difference Result 1012 states and 2932 transitions. [2022-02-16 13:48:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:48:53,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:53,012 INFO L225 Difference]: With dead ends: 1012 [2022-02-16 13:48:53,012 INFO L226 Difference]: Without dead ends: 1012 [2022-02-16 13:48:53,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 13:48:53,013 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:53,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 30 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 604 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-02-16 13:48:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-02-16 13:48:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 903. [2022-02-16 13:48:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.0199556541019956) internal successors, (2724), 902 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2724 transitions. [2022-02-16 13:48:53,023 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2724 transitions. Word has length 17 [2022-02-16 13:48:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:53,023 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 2724 transitions. [2022-02-16 13:48:53,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2724 transitions. [2022-02-16 13:48:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:53,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:53,024 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:53,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:53,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-02-16 13:48:53,240 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1370217039, now seen corresponding path program 245 times [2022-02-16 13:48:53,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:53,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207749807] [2022-02-16 13:48:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:53,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:53,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:53,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207749807] [2022-02-16 13:48:53,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207749807] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:53,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772290948] [2022-02-16 13:48:53,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:53,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:53,342 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:53,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-16 13:48:53,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:48:53,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:53,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:53,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:53,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:53,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:53,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:53,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:53,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:53,628 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:53,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:53,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:53,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772290948] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:53,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:53,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:53,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622998339] [2022-02-16 13:48:53,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:53,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:53,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:53,645 INFO L87 Difference]: Start difference. First operand 903 states and 2724 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:54,193 INFO L93 Difference]: Finished difference Result 984 states and 2887 transitions. [2022-02-16 13:48:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:48:54,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:54,194 INFO L225 Difference]: With dead ends: 984 [2022-02-16 13:48:54,194 INFO L226 Difference]: Without dead ends: 984 [2022-02-16 13:48:54,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:48:54,195 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:54,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 30 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 557 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-02-16 13:48:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-02-16 13:48:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 904. [2022-02-16 13:48:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.018826135105205) internal successors, (2726), 903 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2726 transitions. [2022-02-16 13:48:54,205 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2726 transitions. Word has length 17 [2022-02-16 13:48:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:54,205 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2726 transitions. [2022-02-16 13:48:54,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2726 transitions. [2022-02-16 13:48:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:54,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:54,206 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:54,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:54,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-02-16 13:48:54,419 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash -297131659, now seen corresponding path program 246 times [2022-02-16 13:48:54,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:54,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893077529] [2022-02-16 13:48:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:54,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:54,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:54,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893077529] [2022-02-16 13:48:54,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893077529] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:54,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225041827] [2022-02-16 13:48:54,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:54,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:54,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:54,494 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:54,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-16 13:48:54,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:48:54,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:54,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:54,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:54,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:54,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:54,738 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:54,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:54,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:54,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225041827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:54,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:54,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:54,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446435184] [2022-02-16 13:48:54,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:54,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:54,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:54,752 INFO L87 Difference]: Start difference. First operand 904 states and 2726 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:54,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:54,876 INFO L93 Difference]: Finished difference Result 952 states and 2831 transitions. [2022-02-16 13:48:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:48:54,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:54,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:54,877 INFO L225 Difference]: With dead ends: 952 [2022-02-16 13:48:54,877 INFO L226 Difference]: Without dead ends: 952 [2022-02-16 13:48:54,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:54,890 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:54,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 373 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-02-16 13:48:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-02-16 13:48:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 908. [2022-02-16 13:48:54,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.0187431091510475) internal successors, (2738), 907 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2738 transitions. [2022-02-16 13:48:54,900 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2738 transitions. Word has length 17 [2022-02-16 13:48:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:54,900 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2738 transitions. [2022-02-16 13:48:54,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2738 transitions. [2022-02-16 13:48:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:54,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:54,901 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:54,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:55,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-02-16 13:48:55,117 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:55,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1310389527, now seen corresponding path program 247 times [2022-02-16 13:48:55,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:55,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094265216] [2022-02-16 13:48:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:55,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:55,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:55,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094265216] [2022-02-16 13:48:55,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094265216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:55,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860475250] [2022-02-16 13:48:55,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:55,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:55,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:55,193 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:55,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-16 13:48:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:55,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:55,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:55,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:55,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:55,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:55,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:55,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:55,503 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:55,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:55,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:55,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860475250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:55,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:55,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:55,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281931973] [2022-02-16 13:48:55,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:55,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:55,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:55,517 INFO L87 Difference]: Start difference. First operand 908 states and 2738 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:55,645 INFO L93 Difference]: Finished difference Result 962 states and 2849 transitions. [2022-02-16 13:48:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:48:55,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:55,646 INFO L225 Difference]: With dead ends: 962 [2022-02-16 13:48:55,647 INFO L226 Difference]: Without dead ends: 962 [2022-02-16 13:48:55,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:55,647 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:55,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 376 Invalid, 0 Unknown, 139 Unchecked, 0.1s Time] [2022-02-16 13:48:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-02-16 13:48:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 906. [2022-02-16 13:48:55,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.0187845303867404) internal successors, (2732), 905 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2732 transitions. [2022-02-16 13:48:55,657 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2732 transitions. Word has length 17 [2022-02-16 13:48:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:55,657 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2732 transitions. [2022-02-16 13:48:55,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2732 transitions. [2022-02-16 13:48:55,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:55,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:55,658 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:55,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:55,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:55,873 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:55,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1255530435, now seen corresponding path program 248 times [2022-02-16 13:48:55,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:55,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844159724] [2022-02-16 13:48:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:55,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:55,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:55,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844159724] [2022-02-16 13:48:55,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844159724] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:55,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981001540] [2022-02-16 13:48:55,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:55,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:55,947 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:55,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-16 13:48:55,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:55,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:55,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:55,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:56,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:56,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:56,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:56,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:48:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:56,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:56,197 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:56,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:56,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:56,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981001540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:56,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:56,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:48:56,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025247351] [2022-02-16 13:48:56,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:56,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:56,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:56,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:56,219 INFO L87 Difference]: Start difference. First operand 906 states and 2732 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:56,407 INFO L93 Difference]: Finished difference Result 962 states and 2841 transitions. [2022-02-16 13:48:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:48:56,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:56,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:56,408 INFO L225 Difference]: With dead ends: 962 [2022-02-16 13:48:56,408 INFO L226 Difference]: Without dead ends: 962 [2022-02-16 13:48:56,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:56,409 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:56,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 28 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 444 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2022-02-16 13:48:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-02-16 13:48:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 904. [2022-02-16 13:48:56,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.018826135105205) internal successors, (2726), 903 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2726 transitions. [2022-02-16 13:48:56,418 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2726 transitions. Word has length 17 [2022-02-16 13:48:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:56,419 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2726 transitions. [2022-02-16 13:48:56,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2726 transitions. [2022-02-16 13:48:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:56,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:56,420 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:56,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:56,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:56,636 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash 906074359, now seen corresponding path program 249 times [2022-02-16 13:48:56,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:56,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818860090] [2022-02-16 13:48:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:56,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:56,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:56,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818860090] [2022-02-16 13:48:56,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818860090] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:56,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96393494] [2022-02-16 13:48:56,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:56,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:56,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:56,719 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:56,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-16 13:48:56,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:48:56,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:56,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:56,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:56,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:56,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:56,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:56,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:48:56,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:56,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:48:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:56,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:56,932 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:56,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:56,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:56,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96393494] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:56,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:56,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:56,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772398969] [2022-02-16 13:48:56,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:56,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:56,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:56,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:56,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:56,945 INFO L87 Difference]: Start difference. First operand 904 states and 2726 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:57,209 INFO L93 Difference]: Finished difference Result 1039 states and 2986 transitions. [2022-02-16 13:48:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:48:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:57,211 INFO L225 Difference]: With dead ends: 1039 [2022-02-16 13:48:57,211 INFO L226 Difference]: Without dead ends: 1039 [2022-02-16 13:48:57,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:57,211 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:57,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 230 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-02-16 13:48:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 944. [2022-02-16 13:48:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.027571580063627) internal successors, (2855), 943 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2855 transitions. [2022-02-16 13:48:57,221 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2855 transitions. Word has length 17 [2022-02-16 13:48:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:57,221 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 2855 transitions. [2022-02-16 13:48:57,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2855 transitions. [2022-02-16 13:48:57,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:57,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:57,223 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:57,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:57,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:57,439 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:57,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1836956947, now seen corresponding path program 250 times [2022-02-16 13:48:57,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:57,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387231863] [2022-02-16 13:48:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:57,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:57,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:57,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387231863] [2022-02-16 13:48:57,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387231863] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:57,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971453228] [2022-02-16 13:48:57,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:57,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:57,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:57,508 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:57,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-16 13:48:57,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:57,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:57,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:57,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:57,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:48:57,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:57,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:48:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:57,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:57,726 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:57,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:48:57,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:48:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:57,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971453228] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:57,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:57,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:48:57,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133079338] [2022-02-16 13:48:57,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:57,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:57,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:57,743 INFO L87 Difference]: Start difference. First operand 944 states and 2855 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:58,037 INFO L93 Difference]: Finished difference Result 1027 states and 2957 transitions. [2022-02-16 13:48:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:48:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:58,039 INFO L225 Difference]: With dead ends: 1027 [2022-02-16 13:48:58,039 INFO L226 Difference]: Without dead ends: 1019 [2022-02-16 13:48:58,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:48:58,040 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:58,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 132 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-02-16 13:48:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 950. [2022-02-16 13:48:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 3.0147523709167543) internal successors, (2861), 949 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:58,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2861 transitions. [2022-02-16 13:48:58,060 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2861 transitions. Word has length 17 [2022-02-16 13:48:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:58,060 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 2861 transitions. [2022-02-16 13:48:58,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2861 transitions. [2022-02-16 13:48:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:58,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:58,062 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:58,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:58,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:58,275 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash -254947755, now seen corresponding path program 251 times [2022-02-16 13:48:58,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:58,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789864594] [2022-02-16 13:48:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:58,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:58,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:58,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789864594] [2022-02-16 13:48:58,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789864594] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:58,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437081616] [2022-02-16 13:48:58,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:58,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:58,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:58,383 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:58,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-16 13:48:58,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:48:58,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:58,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:58,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:58,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:48:58,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:58,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:48:58,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:58,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:48:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:58,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:58,628 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:48:58,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:48:58,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:48:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:58,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437081616] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:58,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:58,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:48:58,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088708879] [2022-02-16 13:48:58,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:58,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:58,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:58,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:58,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:58,641 INFO L87 Difference]: Start difference. First operand 950 states and 2861 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:59,661 INFO L93 Difference]: Finished difference Result 1142 states and 3172 transitions. [2022-02-16 13:48:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 13:48:59,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:48:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:59,663 INFO L225 Difference]: With dead ends: 1142 [2022-02-16 13:48:59,663 INFO L226 Difference]: Without dead ends: 1138 [2022-02-16 13:48:59,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=436, Invalid=2644, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 13:48:59,671 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:59,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 192 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:48:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-02-16 13:48:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 948. [2022-02-16 13:48:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 3.0221752903907073) internal successors, (2862), 947 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2862 transitions. [2022-02-16 13:48:59,682 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2862 transitions. Word has length 17 [2022-02-16 13:48:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:59,682 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 2862 transitions. [2022-02-16 13:48:59,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2862 transitions. [2022-02-16 13:48:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:48:59,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:59,683 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:59,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-02-16 13:48:59,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:59,891 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:48:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1299101369, now seen corresponding path program 252 times [2022-02-16 13:48:59,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:59,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202200721] [2022-02-16 13:48:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:59,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:59,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:59,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202200721] [2022-02-16 13:48:59,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202200721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:59,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697905610] [2022-02-16 13:48:59,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:59,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:59,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:00,000 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:00,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-16 13:49:00,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:49:00,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:00,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:00,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:49:00,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:00,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:49:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:00,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:00,339 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:00,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:00,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:00,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697905610] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:00,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:00,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:49:00,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711317079] [2022-02-16 13:49:00,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:00,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:00,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:00,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:00,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:00,366 INFO L87 Difference]: Start difference. First operand 948 states and 2862 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:00,993 INFO L93 Difference]: Finished difference Result 1042 states and 2980 transitions. [2022-02-16 13:49:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:49:00,993 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:00,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:00,994 INFO L225 Difference]: With dead ends: 1042 [2022-02-16 13:49:00,995 INFO L226 Difference]: Without dead ends: 1033 [2022-02-16 13:49:00,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:49:00,995 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:00,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 130 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:49:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-02-16 13:49:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 951. [2022-02-16 13:49:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.0157894736842104) internal successors, (2865), 950 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 2865 transitions. [2022-02-16 13:49:01,006 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 2865 transitions. Word has length 17 [2022-02-16 13:49:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:01,006 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 2865 transitions. [2022-02-16 13:49:01,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 2865 transitions. [2022-02-16 13:49:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:01,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:01,007 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:01,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-02-16 13:49:01,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:01,224 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:01,224 INFO L85 PathProgramCache]: Analyzing trace with hash -15305417, now seen corresponding path program 253 times [2022-02-16 13:49:01,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:01,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980124517] [2022-02-16 13:49:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:01,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:01,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:01,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980124517] [2022-02-16 13:49:01,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980124517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:01,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732839935] [2022-02-16 13:49:01,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:01,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:01,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:01,334 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:01,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-16 13:49:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:01,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:01,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:01,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:01,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:01,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:49:01,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:01,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:49:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:01,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:01,702 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:01,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:01,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:01,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732839935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:01,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:01,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:49:01,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959008878] [2022-02-16 13:49:01,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:01,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:49:01,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:49:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:01,725 INFO L87 Difference]: Start difference. First operand 951 states and 2865 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:03,018 INFO L93 Difference]: Finished difference Result 1141 states and 3180 transitions. [2022-02-16 13:49:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-16 13:49:03,018 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:03,020 INFO L225 Difference]: With dead ends: 1141 [2022-02-16 13:49:03,020 INFO L226 Difference]: Without dead ends: 1135 [2022-02-16 13:49:03,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 13:49:03,020 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 130 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:03,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 126 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:49:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-02-16 13:49:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 957. [2022-02-16 13:49:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.024058577405858) internal successors, (2891), 956 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2891 transitions. [2022-02-16 13:49:03,032 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2891 transitions. Word has length 17 [2022-02-16 13:49:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:03,032 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 2891 transitions. [2022-02-16 13:49:03,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2891 transitions. [2022-02-16 13:49:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:03,033 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:03,033 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:03,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:03,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-02-16 13:49:03,249 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:03,249 INFO L85 PathProgramCache]: Analyzing trace with hash -935006125, now seen corresponding path program 254 times [2022-02-16 13:49:03,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:03,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210438120] [2022-02-16 13:49:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:03,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:03,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:03,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210438120] [2022-02-16 13:49:03,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210438120] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:03,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75288245] [2022-02-16 13:49:03,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:03,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:03,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:03,362 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:03,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-16 13:49:03,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:03,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:03,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:03,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:03,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:49:03,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:03,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:49:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:03,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:03,684 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:03,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:03,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:03,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75288245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:03,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:03,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:49:03,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213016404] [2022-02-16 13:49:03,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:03,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:49:03,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:03,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:49:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:03,724 INFO L87 Difference]: Start difference. First operand 957 states and 2891 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:04,222 INFO L93 Difference]: Finished difference Result 1020 states and 2973 transitions. [2022-02-16 13:49:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:49:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:04,224 INFO L225 Difference]: With dead ends: 1020 [2022-02-16 13:49:04,225 INFO L226 Difference]: Without dead ends: 1014 [2022-02-16 13:49:04,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:49:04,225 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:04,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 98 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-02-16 13:49:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 958. [2022-02-16 13:49:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.0198537095088818) internal successors, (2890), 957 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2890 transitions. [2022-02-16 13:49:04,236 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2890 transitions. Word has length 17 [2022-02-16 13:49:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:04,236 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 2890 transitions. [2022-02-16 13:49:04,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2890 transitions. [2022-02-16 13:49:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:04,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:04,238 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:04,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:04,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-02-16 13:49:04,451 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:04,452 INFO L85 PathProgramCache]: Analyzing trace with hash -7575019, now seen corresponding path program 255 times [2022-02-16 13:49:04,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:04,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276480467] [2022-02-16 13:49:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:04,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:04,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:04,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276480467] [2022-02-16 13:49:04,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276480467] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:04,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490435127] [2022-02-16 13:49:04,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:04,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:04,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:04,561 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:04,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-16 13:49:04,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:49:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:04,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-16 13:49:04,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:04,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:04,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:04,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:04,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:04,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:04,940 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:04,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:04,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:04,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490435127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:04,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:04,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:49:04,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937743078] [2022-02-16 13:49:04,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:04,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:49:04,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:04,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:49:04,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:04,962 INFO L87 Difference]: Start difference. First operand 958 states and 2890 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:06,015 INFO L93 Difference]: Finished difference Result 1119 states and 3082 transitions. [2022-02-16 13:49:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:49:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:06,017 INFO L225 Difference]: With dead ends: 1119 [2022-02-16 13:49:06,017 INFO L226 Difference]: Without dead ends: 1113 [2022-02-16 13:49:06,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=284, Invalid=1696, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 13:49:06,018 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 194 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:06,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 146 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:49:06,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-02-16 13:49:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 937. [2022-02-16 13:49:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.0085470085470085) internal successors, (2816), 936 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2816 transitions. [2022-02-16 13:49:06,030 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2816 transitions. Word has length 17 [2022-02-16 13:49:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:06,030 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 2816 transitions. [2022-02-16 13:49:06,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2816 transitions. [2022-02-16 13:49:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:06,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:06,032 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:06,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-02-16 13:49:06,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-02-16 13:49:06,239 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:06,240 INFO L85 PathProgramCache]: Analyzing trace with hash 794041209, now seen corresponding path program 256 times [2022-02-16 13:49:06,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:06,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344100866] [2022-02-16 13:49:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:06,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:06,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:06,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344100866] [2022-02-16 13:49:06,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344100866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:06,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513098930] [2022-02-16 13:49:06,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:06,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:06,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:06,348 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:06,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-16 13:49:06,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:06,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:06,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:06,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:06,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:06,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:06,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:06,715 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:06,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:06,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:06,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513098930] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:06,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:06,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:49:06,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852264086] [2022-02-16 13:49:06,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:06,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:49:06,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:49:06,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:06,753 INFO L87 Difference]: Start difference. First operand 937 states and 2816 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:07,254 INFO L93 Difference]: Finished difference Result 1015 states and 2930 transitions. [2022-02-16 13:49:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:49:07,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:07,256 INFO L225 Difference]: With dead ends: 1015 [2022-02-16 13:49:07,256 INFO L226 Difference]: Without dead ends: 1011 [2022-02-16 13:49:07,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:49:07,256 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 111 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:07,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 104 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-02-16 13:49:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 942. [2022-02-16 13:49:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 3.0063761955366632) internal successors, (2829), 941 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2829 transitions. [2022-02-16 13:49:07,267 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2829 transitions. Word has length 17 [2022-02-16 13:49:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:07,267 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 2829 transitions. [2022-02-16 13:49:07,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2829 transitions. [2022-02-16 13:49:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:07,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:07,269 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:07,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:07,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-02-16 13:49:07,484 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:07,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:07,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1782582381, now seen corresponding path program 257 times [2022-02-16 13:49:07,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:07,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142383070] [2022-02-16 13:49:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:07,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:07,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:07,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142383070] [2022-02-16 13:49:07,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142383070] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:07,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094274516] [2022-02-16 13:49:07,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:07,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:07,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:07,580 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:07,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-16 13:49:07,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:49:07,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:07,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:07,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:07,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:07,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:07,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:07,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:07,937 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:07,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:07,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:07,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094274516] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:07,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:07,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:49:07,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137847259] [2022-02-16 13:49:07,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:07,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:49:07,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:07,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:49:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:07,965 INFO L87 Difference]: Start difference. First operand 942 states and 2829 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:08,379 INFO L93 Difference]: Finished difference Result 1004 states and 2916 transitions. [2022-02-16 13:49:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:49:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:08,381 INFO L225 Difference]: With dead ends: 1004 [2022-02-16 13:49:08,381 INFO L226 Difference]: Without dead ends: 1004 [2022-02-16 13:49:08,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:49:08,381 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 67 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:08,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 122 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-02-16 13:49:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 931. [2022-02-16 13:49:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.0043010752688173) internal successors, (2794), 930 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2794 transitions. [2022-02-16 13:49:08,391 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2794 transitions. Word has length 17 [2022-02-16 13:49:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:08,391 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 2794 transitions. [2022-02-16 13:49:08,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2794 transitions. [2022-02-16 13:49:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:08,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:08,392 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:08,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:08,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:08,593 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:08,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:08,593 INFO L85 PathProgramCache]: Analyzing trace with hash 505854579, now seen corresponding path program 258 times [2022-02-16 13:49:08,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:08,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304052827] [2022-02-16 13:49:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:08,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:08,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:08,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304052827] [2022-02-16 13:49:08,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304052827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:08,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499260435] [2022-02-16 13:49:08,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:08,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:08,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:08,690 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:08,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-16 13:49:08,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:49:08,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:08,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:08,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:08,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:08,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:08,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:08,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:08,986 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:08,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:08,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:09,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499260435] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:09,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:09,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:49:09,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419053792] [2022-02-16 13:49:09,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:09,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:09,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:09,014 INFO L87 Difference]: Start difference. First operand 931 states and 2794 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:09,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:09,638 INFO L93 Difference]: Finished difference Result 992 states and 2918 transitions. [2022-02-16 13:49:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:49:09,639 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:09,640 INFO L225 Difference]: With dead ends: 992 [2022-02-16 13:49:09,640 INFO L226 Difference]: Without dead ends: 990 [2022-02-16 13:49:09,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:49:09,640 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:09,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 64 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-02-16 13:49:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 937. [2022-02-16 13:49:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.997863247863248) internal successors, (2806), 936 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2806 transitions. [2022-02-16 13:49:09,651 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2806 transitions. Word has length 17 [2022-02-16 13:49:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:09,663 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 2806 transitions. [2022-02-16 13:49:09,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2806 transitions. [2022-02-16 13:49:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:09,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:09,664 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:09,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-02-16 13:49:09,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-02-16 13:49:09,876 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1517986223, now seen corresponding path program 259 times [2022-02-16 13:49:09,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:09,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833531005] [2022-02-16 13:49:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:09,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:09,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:09,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833531005] [2022-02-16 13:49:09,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833531005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:09,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950240470] [2022-02-16 13:49:09,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:09,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:09,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:09,951 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:09,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-16 13:49:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:09,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:09,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:10,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:10,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:10,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:10,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:10,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:10,249 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:49:10,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:49:10,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:10,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950240470] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:10,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:10,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:49:10,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540573320] [2022-02-16 13:49:10,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:10,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:10,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:10,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:10,282 INFO L87 Difference]: Start difference. First operand 937 states and 2806 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:10,579 INFO L93 Difference]: Finished difference Result 1061 states and 3027 transitions. [2022-02-16 13:49:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:49:10,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:10,581 INFO L225 Difference]: With dead ends: 1061 [2022-02-16 13:49:10,581 INFO L226 Difference]: Without dead ends: 1061 [2022-02-16 13:49:10,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:10,581 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:10,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 92 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:10,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2022-02-16 13:49:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 962. [2022-02-16 13:49:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 3.0052029136316336) internal successors, (2888), 961 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 2888 transitions. [2022-02-16 13:49:10,593 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 2888 transitions. Word has length 17 [2022-02-16 13:49:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:10,593 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 2888 transitions. [2022-02-16 13:49:10,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 2888 transitions. [2022-02-16 13:49:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:10,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:10,594 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:10,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:10,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:10,807 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:10,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:10,807 INFO L85 PathProgramCache]: Analyzing trace with hash -716369995, now seen corresponding path program 260 times [2022-02-16 13:49:10,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:10,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082097771] [2022-02-16 13:49:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:10,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:10,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:10,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082097771] [2022-02-16 13:49:10,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082097771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:10,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929284221] [2022-02-16 13:49:10,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:10,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:10,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:10,859 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:10,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-16 13:49:10,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:10,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:10,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:10,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:10,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:10,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:10,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:11,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:11,065 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:49:11,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:49:11,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:49:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:11,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929284221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:11,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:11,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:49:11,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718672823] [2022-02-16 13:49:11,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:11,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:11,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:11,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:11,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:11,083 INFO L87 Difference]: Start difference. First operand 962 states and 2888 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:11,447 INFO L93 Difference]: Finished difference Result 1096 states and 3114 transitions. [2022-02-16 13:49:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:49:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:11,449 INFO L225 Difference]: With dead ends: 1096 [2022-02-16 13:49:11,449 INFO L226 Difference]: Without dead ends: 1092 [2022-02-16 13:49:11,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:49:11,450 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:11,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 146 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-02-16 13:49:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 976. [2022-02-16 13:49:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.0071794871794872) internal successors, (2932), 975 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2932 transitions. [2022-02-16 13:49:11,460 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2932 transitions. Word has length 17 [2022-02-16 13:49:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:11,461 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 2932 transitions. [2022-02-16 13:49:11,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2932 transitions. [2022-02-16 13:49:11,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:11,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:11,462 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:11,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:11,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:11,678 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:11,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:11,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1001973711, now seen corresponding path program 261 times [2022-02-16 13:49:11,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:11,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514441874] [2022-02-16 13:49:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:11,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:11,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:11,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514441874] [2022-02-16 13:49:11,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514441874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:11,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765021109] [2022-02-16 13:49:11,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:11,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:11,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:11,732 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:11,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-16 13:49:11,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:49:11,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:11,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:11,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:11,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:11,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:11,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:11,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:11,933 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:49:11,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:49:11,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:49:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:11,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765021109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:11,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:11,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:49:11,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58678584] [2022-02-16 13:49:11,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:11,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:11,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:11,950 INFO L87 Difference]: Start difference. First operand 976 states and 2932 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:12,198 INFO L93 Difference]: Finished difference Result 1074 states and 3079 transitions. [2022-02-16 13:49:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:49:12,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:12,200 INFO L225 Difference]: With dead ends: 1074 [2022-02-16 13:49:12,200 INFO L226 Difference]: Without dead ends: 1074 [2022-02-16 13:49:12,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:12,201 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:12,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 120 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-02-16 13:49:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 965. [2022-02-16 13:49:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 2.9948132780082988) internal successors, (2887), 964 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 2887 transitions. [2022-02-16 13:49:12,227 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 2887 transitions. Word has length 17 [2022-02-16 13:49:12,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:12,227 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 2887 transitions. [2022-02-16 13:49:12,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 2887 transitions. [2022-02-16 13:49:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:12,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:12,228 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:12,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-02-16 13:49:12,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2022-02-16 13:49:12,436 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash -708639597, now seen corresponding path program 262 times [2022-02-16 13:49:12,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:12,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994831986] [2022-02-16 13:49:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:12,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:12,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:12,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994831986] [2022-02-16 13:49:12,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994831986] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:12,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439778549] [2022-02-16 13:49:12,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:12,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:12,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:12,512 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:12,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-16 13:49:12,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:12,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:12,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:12,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:12,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:12,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:12,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:12,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:12,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:12,697 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:49:12,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:49:12,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:49:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:12,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439778549] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:12,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:12,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:49:12,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436299648] [2022-02-16 13:49:12,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:12,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:12,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:12,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:12,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:12,713 INFO L87 Difference]: Start difference. First operand 965 states and 2887 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:12,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:12,927 INFO L93 Difference]: Finished difference Result 1048 states and 3022 transitions. [2022-02-16 13:49:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:49:12,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:12,929 INFO L225 Difference]: With dead ends: 1048 [2022-02-16 13:49:12,929 INFO L226 Difference]: Without dead ends: 1048 [2022-02-16 13:49:12,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:12,929 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:12,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 152 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 673 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-02-16 13:49:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-02-16 13:49:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 964. [2022-02-16 13:49:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.9937694704049846) internal successors, (2883), 963 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2883 transitions. [2022-02-16 13:49:12,940 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2883 transitions. Word has length 17 [2022-02-16 13:49:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:12,940 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 2883 transitions. [2022-02-16 13:49:12,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2883 transitions. [2022-02-16 13:49:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:12,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:12,941 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:12,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-02-16 13:49:13,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:13,158 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:13,158 INFO L85 PathProgramCache]: Analyzing trace with hash -561657485, now seen corresponding path program 263 times [2022-02-16 13:49:13,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:13,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890869352] [2022-02-16 13:49:13,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:13,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:13,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:13,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890869352] [2022-02-16 13:49:13,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890869352] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:13,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104968300] [2022-02-16 13:49:13,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:13,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:13,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:13,246 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:13,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-16 13:49:13,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:49:13,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:13,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:13,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:13,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:13,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:13,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:13,532 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:49:13,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:49:13,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:13,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104968300] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:13,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:13,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:49:13,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711016963] [2022-02-16 13:49:13,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:13,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:13,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:13,568 INFO L87 Difference]: Start difference. First operand 964 states and 2883 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:13,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:13,932 INFO L93 Difference]: Finished difference Result 1006 states and 2955 transitions. [2022-02-16 13:49:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:49:13,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:13,933 INFO L225 Difference]: With dead ends: 1006 [2022-02-16 13:49:13,933 INFO L226 Difference]: Without dead ends: 1004 [2022-02-16 13:49:13,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:49:13,934 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 53 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:13,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 24 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-02-16 13:49:13,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 966. [2022-02-16 13:49:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.985492227979275) internal successors, (2881), 965 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 2881 transitions. [2022-02-16 13:49:13,944 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 2881 transitions. Word has length 17 [2022-02-16 13:49:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:13,944 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 2881 transitions. [2022-02-16 13:49:13,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 2881 transitions. [2022-02-16 13:49:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:13,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:13,945 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:13,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:14,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-02-16 13:49:14,161 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:14,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1167389849, now seen corresponding path program 264 times [2022-02-16 13:49:14,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:14,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031077934] [2022-02-16 13:49:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:14,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:14,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:14,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031077934] [2022-02-16 13:49:14,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031077934] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:14,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000834483] [2022-02-16 13:49:14,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:14,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:14,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:14,222 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:14,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-16 13:49:14,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:49:14,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:14,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:14,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:49:14,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:14,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:49:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:14,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:14,433 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:49:14,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:49:14,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:14,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000834483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:14,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:14,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:49:14,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845211160] [2022-02-16 13:49:14,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:14,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:14,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:14,452 INFO L87 Difference]: Start difference. First operand 966 states and 2881 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:14,640 INFO L93 Difference]: Finished difference Result 981 states and 2909 transitions. [2022-02-16 13:49:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:49:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:14,642 INFO L225 Difference]: With dead ends: 981 [2022-02-16 13:49:14,642 INFO L226 Difference]: Without dead ends: 977 [2022-02-16 13:49:14,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:14,642 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:14,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 355 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-02-16 13:49:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-02-16 13:49:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 966. [2022-02-16 13:49:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.9751295336787567) internal successors, (2871), 965 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 2871 transitions. [2022-02-16 13:49:14,652 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 2871 transitions. Word has length 17 [2022-02-16 13:49:14,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:14,652 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 2871 transitions. [2022-02-16 13:49:14,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 2871 transitions. [2022-02-16 13:49:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:14,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:14,653 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:14,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:14,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-02-16 13:49:14,869 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:14,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1096093291, now seen corresponding path program 265 times [2022-02-16 13:49:14,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:14,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131165682] [2022-02-16 13:49:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:14,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:14,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:14,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131165682] [2022-02-16 13:49:14,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131165682] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:14,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955507974] [2022-02-16 13:49:14,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:14,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:14,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:14,951 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:14,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-16 13:49:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:14,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:14,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:15,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:15,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:15,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:15,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:15,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:15,288 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:15,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:15,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:15,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955507974] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:15,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:15,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:49:15,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057819434] [2022-02-16 13:49:15,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:15,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:15,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:15,318 INFO L87 Difference]: Start difference. First operand 966 states and 2871 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:15,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:15,714 INFO L93 Difference]: Finished difference Result 1114 states and 3122 transitions. [2022-02-16 13:49:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:49:15,714 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:15,716 INFO L225 Difference]: With dead ends: 1114 [2022-02-16 13:49:15,716 INFO L226 Difference]: Without dead ends: 1114 [2022-02-16 13:49:15,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:49:15,716 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 130 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:15,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 90 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-02-16 13:49:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 987. [2022-02-16 13:49:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.9858012170385395) internal successors, (2944), 986 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2944 transitions. [2022-02-16 13:49:15,729 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2944 transitions. Word has length 17 [2022-02-16 13:49:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:15,729 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 2944 transitions. [2022-02-16 13:49:15,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2944 transitions. [2022-02-16 13:49:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:15,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:15,731 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:15,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:15,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-02-16 13:49:15,931 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:15,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:15,931 INFO L85 PathProgramCache]: Analyzing trace with hash -294477063, now seen corresponding path program 266 times [2022-02-16 13:49:15,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:15,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557570475] [2022-02-16 13:49:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:15,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:16,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:16,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557570475] [2022-02-16 13:49:16,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557570475] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:16,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68106896] [2022-02-16 13:49:16,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:16,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:16,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:16,031 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:16,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-16 13:49:16,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:16,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:16,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:16,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:16,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:16,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:16,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:16,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:16,321 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:16,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:16,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:16,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68106896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:16,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:16,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-02-16 13:49:16,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719547892] [2022-02-16 13:49:16,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:16,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:16,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:16,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:16,341 INFO L87 Difference]: Start difference. First operand 987 states and 2944 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:17,313 INFO L93 Difference]: Finished difference Result 1235 states and 3387 transitions. [2022-02-16 13:49:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 13:49:17,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:17,315 INFO L225 Difference]: With dead ends: 1235 [2022-02-16 13:49:17,315 INFO L226 Difference]: Without dead ends: 1229 [2022-02-16 13:49:17,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=379, Invalid=2483, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 13:49:17,315 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 193 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:17,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 130 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:49:17,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-02-16 13:49:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1012. [2022-02-16 13:49:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.99406528189911) internal successors, (3027), 1011 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3027 transitions. [2022-02-16 13:49:17,328 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3027 transitions. Word has length 17 [2022-02-16 13:49:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:17,328 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3027 transitions. [2022-02-16 13:49:17,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3027 transitions. [2022-02-16 13:49:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:17,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:17,329 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:17,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:17,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-02-16 13:49:17,534 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:17,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1423866643, now seen corresponding path program 267 times [2022-02-16 13:49:17,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:17,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603593572] [2022-02-16 13:49:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:17,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:17,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:17,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603593572] [2022-02-16 13:49:17,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603593572] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:17,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261812842] [2022-02-16 13:49:17,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:17,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:17,644 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:17,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-16 13:49:17,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:49:17,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:17,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:17,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:17,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:17,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:17,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:17,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:17,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:17,952 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:17,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:17,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:17,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261812842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:17,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:17,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-02-16 13:49:17,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783578146] [2022-02-16 13:49:17,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:17,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:17,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:17,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:17,972 INFO L87 Difference]: Start difference. First operand 1012 states and 3027 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:18,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:18,567 INFO L93 Difference]: Finished difference Result 1196 states and 3328 transitions. [2022-02-16 13:49:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:49:18,567 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:18,569 INFO L225 Difference]: With dead ends: 1196 [2022-02-16 13:49:18,569 INFO L226 Difference]: Without dead ends: 1196 [2022-02-16 13:49:18,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 13:49:18,569 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 104 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:18,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 126 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-02-16 13:49:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 996. [2022-02-16 13:49:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 2.978894472361809) internal successors, (2964), 995 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 2964 transitions. [2022-02-16 13:49:18,580 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 2964 transitions. Word has length 17 [2022-02-16 13:49:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:18,580 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 2964 transitions. [2022-02-16 13:49:18,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 2964 transitions. [2022-02-16 13:49:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:18,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:18,582 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:18,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:18,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:18,797 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:18,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -286746665, now seen corresponding path program 268 times [2022-02-16 13:49:18,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:18,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142617560] [2022-02-16 13:49:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:18,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:18,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:18,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142617560] [2022-02-16 13:49:18,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142617560] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:18,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004960499] [2022-02-16 13:49:18,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:18,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:18,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:18,914 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:18,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-16 13:49:18,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:18,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:18,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:18,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:19,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:19,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:19,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:19,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:19,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:19,171 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:19,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:19,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:19,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004960499] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:19,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:19,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:49:19,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891470477] [2022-02-16 13:49:19,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:19,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:19,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:19,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:19,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:19,191 INFO L87 Difference]: Start difference. First operand 996 states and 2964 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:19,856 INFO L93 Difference]: Finished difference Result 1133 states and 3184 transitions. [2022-02-16 13:49:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:49:19,857 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:19,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:19,858 INFO L225 Difference]: With dead ends: 1133 [2022-02-16 13:49:19,858 INFO L226 Difference]: Without dead ends: 1133 [2022-02-16 13:49:19,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 13:49:19,859 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:19,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 136 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 641 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-02-16 13:49:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-02-16 13:49:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 998. [2022-02-16 13:49:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.973921765295888) internal successors, (2965), 997 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2965 transitions. [2022-02-16 13:49:19,870 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2965 transitions. Word has length 17 [2022-02-16 13:49:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:19,870 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 2965 transitions. [2022-02-16 13:49:19,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2965 transitions. [2022-02-16 13:49:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:19,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:19,871 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:19,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:20,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-02-16 13:49:20,087 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:20,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1320774521, now seen corresponding path program 269 times [2022-02-16 13:49:20,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:20,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142950125] [2022-02-16 13:49:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:20,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:20,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:20,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142950125] [2022-02-16 13:49:20,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142950125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:20,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905184647] [2022-02-16 13:49:20,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:20,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:20,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:20,167 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:20,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-02-16 13:49:20,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:49:20,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:20,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:20,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:20,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:20,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:20,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:20,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:20,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:20,487 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:20,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:20,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:20,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905184647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:20,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:20,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:49:20,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228149142] [2022-02-16 13:49:20,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:20,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:20,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:20,511 INFO L87 Difference]: Start difference. First operand 998 states and 2965 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:21,088 INFO L93 Difference]: Finished difference Result 1113 states and 3153 transitions. [2022-02-16 13:49:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:49:21,088 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:21,089 INFO L225 Difference]: With dead ends: 1113 [2022-02-16 13:49:21,089 INFO L226 Difference]: Without dead ends: 1113 [2022-02-16 13:49:21,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:49:21,090 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:21,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 116 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 582 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-02-16 13:49:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-02-16 13:49:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 988. [2022-02-16 13:49:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 2.973657548125633) internal successors, (2935), 987 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2935 transitions. [2022-02-16 13:49:21,100 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2935 transitions. Word has length 17 [2022-02-16 13:49:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:21,101 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 2935 transitions. [2022-02-16 13:49:21,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2935 transitions. [2022-02-16 13:49:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:21,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:21,102 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:21,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:21,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-02-16 13:49:21,313 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:21,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1776151661, now seen corresponding path program 270 times [2022-02-16 13:49:21,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:21,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573274856] [2022-02-16 13:49:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:21,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:21,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:21,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573274856] [2022-02-16 13:49:21,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573274856] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:21,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029799665] [2022-02-16 13:49:21,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:21,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:21,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:21,389 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:21,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-02-16 13:49:21,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:49:21,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:21,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:21,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:21,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:21,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:21,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:21,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:21,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:21,697 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:21,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:21,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:21,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029799665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:21,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:21,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:49:21,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247131537] [2022-02-16 13:49:21,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:21,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:49:21,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:21,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:49:21,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:49:21,721 INFO L87 Difference]: Start difference. First operand 988 states and 2935 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:21,969 INFO L93 Difference]: Finished difference Result 1080 states and 3088 transitions. [2022-02-16 13:49:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:49:21,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:21,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:21,970 INFO L225 Difference]: With dead ends: 1080 [2022-02-16 13:49:21,971 INFO L226 Difference]: Without dead ends: 1080 [2022-02-16 13:49:21,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:21,971 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:21,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 138 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 590 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-02-16 13:49:21,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-02-16 13:49:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 988. [2022-02-16 13:49:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 2.973657548125633) internal successors, (2935), 987 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2935 transitions. [2022-02-16 13:49:21,981 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2935 transitions. Word has length 17 [2022-02-16 13:49:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:21,981 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 2935 transitions. [2022-02-16 13:49:21,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2935 transitions. [2022-02-16 13:49:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:21,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:21,983 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:21,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:22,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:22,191 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:22,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1799298487, now seen corresponding path program 271 times [2022-02-16 13:49:22,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:22,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265915915] [2022-02-16 13:49:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:22,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:22,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:22,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265915915] [2022-02-16 13:49:22,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265915915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:22,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228560266] [2022-02-16 13:49:22,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:22,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:22,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:22,284 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:22,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-02-16 13:49:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:22,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:22,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:22,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:22,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:22,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:22,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:22,529 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:22,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:22,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:22,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228560266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:22,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:22,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:49:22,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599361411] [2022-02-16 13:49:22,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:22,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:22,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:22,547 INFO L87 Difference]: Start difference. First operand 988 states and 2935 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:22,960 INFO L93 Difference]: Finished difference Result 1107 states and 3149 transitions. [2022-02-16 13:49:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:49:22,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:22,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:22,962 INFO L225 Difference]: With dead ends: 1107 [2022-02-16 13:49:22,962 INFO L226 Difference]: Without dead ends: 1105 [2022-02-16 13:49:22,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:49:22,962 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:22,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 98 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-02-16 13:49:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1004. [2022-02-16 13:49:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 2.9740777666999003) internal successors, (2983), 1003 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 2983 transitions. [2022-02-16 13:49:22,974 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 2983 transitions. Word has length 17 [2022-02-16 13:49:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:22,974 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 2983 transitions. [2022-02-16 13:49:22,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 2983 transitions. [2022-02-16 13:49:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:22,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:22,975 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:22,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:23,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:23,190 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:23,190 INFO L85 PathProgramCache]: Analyzing trace with hash -766621475, now seen corresponding path program 272 times [2022-02-16 13:49:23,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:23,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164130833] [2022-02-16 13:49:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:23,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:23,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:23,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164130833] [2022-02-16 13:49:23,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164130833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:23,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341899675] [2022-02-16 13:49:23,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:23,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:23,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:23,260 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:23,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-02-16 13:49:23,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:23,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:23,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:23,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:23,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:49:23,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:23,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:49:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:23,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:23,496 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:23,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:23,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:23,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341899675] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:23,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:23,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:49:23,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733965204] [2022-02-16 13:49:23,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:23,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:23,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:23,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:23,515 INFO L87 Difference]: Start difference. First operand 1004 states and 2983 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:23,864 INFO L93 Difference]: Finished difference Result 1064 states and 3066 transitions. [2022-02-16 13:49:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:49:23,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:23,866 INFO L225 Difference]: With dead ends: 1064 [2022-02-16 13:49:23,866 INFO L226 Difference]: Without dead ends: 1060 [2022-02-16 13:49:23,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:49:23,866 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:23,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 118 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 606 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-02-16 13:49:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-02-16 13:49:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1004. [2022-02-16 13:49:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 2.9680957128614156) internal successors, (2977), 1003 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 2977 transitions. [2022-02-16 13:49:23,877 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 2977 transitions. Word has length 17 [2022-02-16 13:49:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:23,877 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 2977 transitions. [2022-02-16 13:49:23,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 2977 transitions. [2022-02-16 13:49:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:23,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:23,879 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:23,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:24,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:24,094 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:24,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1294238327, now seen corresponding path program 273 times [2022-02-16 13:49:24,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:24,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15337639] [2022-02-16 13:49:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:24,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:24,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:24,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15337639] [2022-02-16 13:49:24,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15337639] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:24,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414768672] [2022-02-16 13:49:24,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:24,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:24,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:24,154 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:24,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-02-16 13:49:24,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:49:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:24,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:24,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:49:24,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:24,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:49:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:24,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:24,379 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:24,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:24,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:49:24,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414768672] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:24,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:24,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:49:24,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645557287] [2022-02-16 13:49:24,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:24,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:49:24,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:49:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:49:24,398 INFO L87 Difference]: Start difference. First operand 1004 states and 2977 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:24,685 INFO L93 Difference]: Finished difference Result 1059 states and 3049 transitions. [2022-02-16 13:49:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:49:24,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:24,687 INFO L225 Difference]: With dead ends: 1059 [2022-02-16 13:49:24,687 INFO L226 Difference]: Without dead ends: 1053 [2022-02-16 13:49:24,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:49:24,687 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:24,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 110 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 508 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-02-16 13:49:24,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-02-16 13:49:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1007. [2022-02-16 13:49:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 2.957256461232604) internal successors, (2975), 1006 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 2975 transitions. [2022-02-16 13:49:24,698 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 2975 transitions. Word has length 17 [2022-02-16 13:49:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:24,698 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 2975 transitions. [2022-02-16 13:49:24,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 2975 transitions. [2022-02-16 13:49:24,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:24,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:24,699 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:24,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:24,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:24,906 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash -902314287, now seen corresponding path program 274 times [2022-02-16 13:49:24,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:24,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230602563] [2022-02-16 13:49:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:24,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:25,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:25,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230602563] [2022-02-16 13:49:25,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230602563] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:25,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033416039] [2022-02-16 13:49:25,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:25,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:25,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:25,007 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:25,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-02-16 13:49:25,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:25,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:25,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:25,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:25,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:25,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:25,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:25,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:25,289 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:25,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:25,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:25,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033416039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:25,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:25,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-16 13:49:25,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250613431] [2022-02-16 13:49:25,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:25,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:49:25,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:49:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:25,307 INFO L87 Difference]: Start difference. First operand 1007 states and 2975 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:25,566 INFO L93 Difference]: Finished difference Result 1177 states and 3299 transitions. [2022-02-16 13:49:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:49:25,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:25,568 INFO L225 Difference]: With dead ends: 1177 [2022-02-16 13:49:25,568 INFO L226 Difference]: Without dead ends: 1176 [2022-02-16 13:49:25,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:49:25,568 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 125 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:25,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 116 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-02-16 13:49:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1044. [2022-02-16 13:49:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 2.980824544582934) internal successors, (3109), 1043 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3109 transitions. [2022-02-16 13:49:25,580 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3109 transitions. Word has length 17 [2022-02-16 13:49:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:25,580 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 3109 transitions. [2022-02-16 13:49:25,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3109 transitions. [2022-02-16 13:49:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:25,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:25,581 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:25,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:25,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-02-16 13:49:25,787 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:25,787 INFO L85 PathProgramCache]: Analyzing trace with hash -100698059, now seen corresponding path program 275 times [2022-02-16 13:49:25,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:25,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270186137] [2022-02-16 13:49:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:25,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:25,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:25,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270186137] [2022-02-16 13:49:25,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270186137] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:25,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792565159] [2022-02-16 13:49:25,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:25,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:25,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:25,888 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:25,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-02-16 13:49:25,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 13:49:25,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:25,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:26,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:26,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:26,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:26,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:26,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:26,189 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:26,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:26,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:26,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792565159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:26,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:26,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:49:26,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643891577] [2022-02-16 13:49:26,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:26,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:49:26,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:49:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:26,203 INFO L87 Difference]: Start difference. First operand 1044 states and 3109 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:27,297 INFO L93 Difference]: Finished difference Result 1212 states and 3385 transitions. [2022-02-16 13:49:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 13:49:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:27,299 INFO L225 Difference]: With dead ends: 1212 [2022-02-16 13:49:27,299 INFO L226 Difference]: Without dead ends: 1205 [2022-02-16 13:49:27,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 13:49:27,300 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 168 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:27,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 102 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:49:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-02-16 13:49:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1078. [2022-02-16 13:49:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.988857938718663) internal successors, (3219), 1077 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3219 transitions. [2022-02-16 13:49:27,312 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3219 transitions. Word has length 17 [2022-02-16 13:49:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:27,312 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 3219 transitions. [2022-02-16 13:49:27,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3219 transitions. [2022-02-16 13:49:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:27,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:27,313 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:27,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:27,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-02-16 13:49:27,518 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1617645647, now seen corresponding path program 276 times [2022-02-16 13:49:27,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:27,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985872479] [2022-02-16 13:49:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:27,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:27,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:27,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985872479] [2022-02-16 13:49:27,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985872479] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:27,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389685756] [2022-02-16 13:49:27,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:27,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:27,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:27,617 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:27,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-02-16 13:49:27,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:49:27,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:27,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:27,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:27,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:27,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:27,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:27,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:27,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:27,905 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:27,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:27,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:27,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389685756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:27,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:27,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-16 13:49:27,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70612669] [2022-02-16 13:49:27,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:27,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:49:27,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:49:27,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:27,920 INFO L87 Difference]: Start difference. First operand 1078 states and 3219 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:28,592 INFO L93 Difference]: Finished difference Result 1213 states and 3370 transitions. [2022-02-16 13:49:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:49:28,592 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:28,594 INFO L225 Difference]: With dead ends: 1213 [2022-02-16 13:49:28,594 INFO L226 Difference]: Without dead ends: 1211 [2022-02-16 13:49:28,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=329, Invalid=1741, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 13:49:28,594 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 125 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:28,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 92 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-02-16 13:49:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1042. [2022-02-16 13:49:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.966378482228626) internal successors, (3088), 1041 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3088 transitions. [2022-02-16 13:49:28,606 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3088 transitions. Word has length 17 [2022-02-16 13:49:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:28,606 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 3088 transitions. [2022-02-16 13:49:28,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3088 transitions. [2022-02-16 13:49:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:28,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:28,607 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:28,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:28,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-02-16 13:49:28,820 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:28,821 INFO L85 PathProgramCache]: Analyzing trace with hash -92967661, now seen corresponding path program 277 times [2022-02-16 13:49:28,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:28,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722986281] [2022-02-16 13:49:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:28,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:28,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:28,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722986281] [2022-02-16 13:49:28,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722986281] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:28,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919713722] [2022-02-16 13:49:28,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:28,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:28,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:28,892 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:28,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-02-16 13:49:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:28,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:28,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:29,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:29,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:29,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:29,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:29,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:29,137 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:29,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:29,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:29,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919713722] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:29,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:29,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:49:29,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032635677] [2022-02-16 13:49:29,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:29,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:49:29,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:29,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:49:29,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:29,151 INFO L87 Difference]: Start difference. First operand 1042 states and 3088 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:29,885 INFO L93 Difference]: Finished difference Result 1164 states and 3277 transitions. [2022-02-16 13:49:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:49:29,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:29,887 INFO L225 Difference]: With dead ends: 1164 [2022-02-16 13:49:29,887 INFO L226 Difference]: Without dead ends: 1162 [2022-02-16 13:49:29,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 13:49:29,888 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 49 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:29,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 64 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 714 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-02-16 13:49:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-02-16 13:49:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1021. [2022-02-16 13:49:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.957843137254902) internal successors, (3017), 1020 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3017 transitions. [2022-02-16 13:49:29,899 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3017 transitions. Word has length 17 [2022-02-16 13:49:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:29,899 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 3017 transitions. [2022-02-16 13:49:29,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3017 transitions. [2022-02-16 13:49:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:29,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:29,900 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:29,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:30,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:30,116 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1582372657, now seen corresponding path program 278 times [2022-02-16 13:49:30,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:30,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614089219] [2022-02-16 13:49:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:30,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:30,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:30,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614089219] [2022-02-16 13:49:30,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614089219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:30,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873918025] [2022-02-16 13:49:30,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:30,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:30,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:30,208 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:30,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-02-16 13:49:30,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:30,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:30,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:30,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:30,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:30,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:30,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:30,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:30,493 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:30,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:30,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:30,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873918025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:30,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:30,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:49:30,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941989215] [2022-02-16 13:49:30,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:30,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:30,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:30,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:30,511 INFO L87 Difference]: Start difference. First operand 1021 states and 3017 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:31,100 INFO L93 Difference]: Finished difference Result 1097 states and 3152 transitions. [2022-02-16 13:49:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:49:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:31,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:31,102 INFO L225 Difference]: With dead ends: 1097 [2022-02-16 13:49:31,102 INFO L226 Difference]: Without dead ends: 1097 [2022-02-16 13:49:31,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 13:49:31,102 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:31,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 58 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 533 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-02-16 13:49:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-02-16 13:49:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1028. [2022-02-16 13:49:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.955209347614411) internal successors, (3035), 1027 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3035 transitions. [2022-02-16 13:49:31,113 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3035 transitions. Word has length 17 [2022-02-16 13:49:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:31,113 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 3035 transitions. [2022-02-16 13:49:31,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3035 transitions. [2022-02-16 13:49:31,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:31,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:31,115 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:31,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:31,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2022-02-16 13:49:31,325 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash 25148529, now seen corresponding path program 279 times [2022-02-16 13:49:31,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:31,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483403604] [2022-02-16 13:49:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:31,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:31,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:31,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483403604] [2022-02-16 13:49:31,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483403604] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:31,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650054824] [2022-02-16 13:49:31,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:31,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:31,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:31,421 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:31,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-02-16 13:49:31,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:49:31,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:31,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:31,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:31,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:31,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:31,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:31,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:31,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:31,722 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:31,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:31,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:31,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650054824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:31,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:31,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:49:31,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869740974] [2022-02-16 13:49:31,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:31,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:31,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:31,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:31,736 INFO L87 Difference]: Start difference. First operand 1028 states and 3035 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:32,296 INFO L93 Difference]: Finished difference Result 1105 states and 3162 transitions. [2022-02-16 13:49:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:49:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:32,298 INFO L225 Difference]: With dead ends: 1105 [2022-02-16 13:49:32,298 INFO L226 Difference]: Without dead ends: 1105 [2022-02-16 13:49:32,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 13:49:32,298 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:32,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 52 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 597 Invalid, 0 Unknown, 147 Unchecked, 0.2s Time] [2022-02-16 13:49:32,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-02-16 13:49:32,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1009. [2022-02-16 13:49:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 2.9613095238095237) internal successors, (2985), 1008 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2985 transitions. [2022-02-16 13:49:32,309 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2985 transitions. Word has length 17 [2022-02-16 13:49:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:32,309 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2985 transitions. [2022-02-16 13:49:32,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2985 transitions. [2022-02-16 13:49:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:32,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:32,310 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:32,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:32,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:32,527 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash -509287277, now seen corresponding path program 280 times [2022-02-16 13:49:32,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:32,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103176454] [2022-02-16 13:49:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:32,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:32,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:32,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103176454] [2022-02-16 13:49:32,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103176454] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:32,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460140329] [2022-02-16 13:49:32,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:32,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:32,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:32,631 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:32,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-02-16 13:49:32,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:32,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:32,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:32,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:32,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:32,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:32,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:32,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:32,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:32,926 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:32,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:32,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:32,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460140329] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:32,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:32,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:49:32,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612173924] [2022-02-16 13:49:32,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:32,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:32,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:32,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:32,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:32,943 INFO L87 Difference]: Start difference. First operand 1009 states and 2985 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:33,100 INFO L93 Difference]: Finished difference Result 1050 states and 3060 transitions. [2022-02-16 13:49:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:49:33,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:33,101 INFO L225 Difference]: With dead ends: 1050 [2022-02-16 13:49:33,101 INFO L226 Difference]: Without dead ends: 1050 [2022-02-16 13:49:33,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:33,102 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:33,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 373 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-02-16 13:49:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-02-16 13:49:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1013. [2022-02-16 13:49:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.9614624505928853) internal successors, (2997), 1012 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2997 transitions. [2022-02-16 13:49:33,112 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2997 transitions. Word has length 17 [2022-02-16 13:49:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:33,112 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 2997 transitions. [2022-02-16 13:49:33,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2997 transitions. [2022-02-16 13:49:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:33,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:33,113 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:33,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:33,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:33,329 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1098233909, now seen corresponding path program 281 times [2022-02-16 13:49:33,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:33,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458800809] [2022-02-16 13:49:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:33,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:33,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:33,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458800809] [2022-02-16 13:49:33,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458800809] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:33,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220364973] [2022-02-16 13:49:33,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:33,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:33,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:33,469 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:33,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-02-16 13:49:33,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:49:33,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:33,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:33,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:33,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:33,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:33,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:33,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:33,803 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:33,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:33,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:33,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220364973] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:33,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:33,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:49:33,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349225131] [2022-02-16 13:49:33,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:33,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:33,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:33,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:33,825 INFO L87 Difference]: Start difference. First operand 1013 states and 2997 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:34,015 INFO L93 Difference]: Finished difference Result 1066 states and 3088 transitions. [2022-02-16 13:49:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:49:34,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:34,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:34,017 INFO L225 Difference]: With dead ends: 1066 [2022-02-16 13:49:34,017 INFO L226 Difference]: Without dead ends: 1066 [2022-02-16 13:49:34,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:34,017 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:34,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 54 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 374 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2022-02-16 13:49:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-02-16 13:49:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1009. [2022-02-16 13:49:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 2.9613095238095237) internal successors, (2985), 1008 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2985 transitions. [2022-02-16 13:49:34,029 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2985 transitions. Word has length 17 [2022-02-16 13:49:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:34,029 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2985 transitions. [2022-02-16 13:49:34,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2985 transitions. [2022-02-16 13:49:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:34,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:34,030 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:34,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:34,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:34,244 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash 879028083, now seen corresponding path program 282 times [2022-02-16 13:49:34,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:34,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417761532] [2022-02-16 13:49:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:34,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:34,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:34,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417761532] [2022-02-16 13:49:34,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417761532] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:34,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676065152] [2022-02-16 13:49:34,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:34,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:34,343 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:34,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-02-16 13:49:34,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:49:34,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:34,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:34,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:34,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:34,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:49:34,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:49:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:34,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:34,614 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:34,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:49:34,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:49:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:34,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676065152] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:34,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:34,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-16 13:49:34,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745012507] [2022-02-16 13:49:34,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:34,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:49:34,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:49:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:49:34,628 INFO L87 Difference]: Start difference. First operand 1009 states and 2985 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:34,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:34,912 INFO L93 Difference]: Finished difference Result 1261 states and 3656 transitions. [2022-02-16 13:49:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:34,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:34,914 INFO L225 Difference]: With dead ends: 1261 [2022-02-16 13:49:34,914 INFO L226 Difference]: Without dead ends: 1261 [2022-02-16 13:49:34,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:34,914 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:34,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 44 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-02-16 13:49:34,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1008. [2022-02-16 13:49:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.9632571996027806) internal successors, (2984), 1007 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2984 transitions. [2022-02-16 13:49:34,926 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2984 transitions. Word has length 17 [2022-02-16 13:49:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:34,926 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 2984 transitions. [2022-02-16 13:49:34,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2984 transitions. [2022-02-16 13:49:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:34,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:34,927 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:34,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:35,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:35,143 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash 744702619, now seen corresponding path program 283 times [2022-02-16 13:49:35,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:35,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280582936] [2022-02-16 13:49:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:35,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:35,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:35,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280582936] [2022-02-16 13:49:35,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280582936] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:35,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113522872] [2022-02-16 13:49:35,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:35,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:35,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:35,249 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:35,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-02-16 13:49:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:35,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:49:35,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:49:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:35,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:35,496 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:35,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:49:35,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:35,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113522872] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:35,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:35,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-16 13:49:35,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100828724] [2022-02-16 13:49:35,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:35,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:49:35,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:35,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:49:35,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:49:35,510 INFO L87 Difference]: Start difference. First operand 1008 states and 2984 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:35,728 INFO L93 Difference]: Finished difference Result 1257 states and 3643 transitions. [2022-02-16 13:49:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:49:35,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:35,730 INFO L225 Difference]: With dead ends: 1257 [2022-02-16 13:49:35,730 INFO L226 Difference]: Without dead ends: 1252 [2022-02-16 13:49:35,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:49:35,730 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:35,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 38 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-02-16 13:49:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1008. [2022-02-16 13:49:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.9622641509433962) internal successors, (2983), 1007 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2983 transitions. [2022-02-16 13:49:35,742 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2983 transitions. Word has length 17 [2022-02-16 13:49:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:35,742 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 2983 transitions. [2022-02-16 13:49:35,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2983 transitions. [2022-02-16 13:49:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:35,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:35,743 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:35,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:35,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:35,959 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:35,959 INFO L85 PathProgramCache]: Analyzing trace with hash -773925291, now seen corresponding path program 284 times [2022-02-16 13:49:35,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:35,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745495311] [2022-02-16 13:49:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:35,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:36,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:36,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745495311] [2022-02-16 13:49:36,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745495311] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:36,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732660922] [2022-02-16 13:49:36,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:36,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:36,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:36,038 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:36,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-02-16 13:49:36,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:36,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:36,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:36,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:36,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:36,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:36,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:36,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:36,316 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:36,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:49:36,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:49:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:36,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732660922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:36,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:36,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:49:36,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340139268] [2022-02-16 13:49:36,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:36,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:49:36,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:36,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:49:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:49:36,328 INFO L87 Difference]: Start difference. First operand 1008 states and 2983 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:36,579 INFO L93 Difference]: Finished difference Result 1279 states and 3691 transitions. [2022-02-16 13:49:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:49:36,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:36,582 INFO L225 Difference]: With dead ends: 1279 [2022-02-16 13:49:36,582 INFO L226 Difference]: Without dead ends: 1279 [2022-02-16 13:49:36,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:49:36,582 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:36,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 424 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-02-16 13:49:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-02-16 13:49:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1011. [2022-02-16 13:49:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.9623762376237623) internal successors, (2992), 1010 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2992 transitions. [2022-02-16 13:49:36,598 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2992 transitions. Word has length 17 [2022-02-16 13:49:36,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:36,598 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 2992 transitions. [2022-02-16 13:49:36,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2992 transitions. [2022-02-16 13:49:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:36,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:36,600 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:36,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:36,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:36,824 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1286934511, now seen corresponding path program 285 times [2022-02-16 13:49:36,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:36,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94207640] [2022-02-16 13:49:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:36,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:36,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:36,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94207640] [2022-02-16 13:49:36,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94207640] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:36,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126394875] [2022-02-16 13:49:36,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:36,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:36,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:36,935 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:36,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-02-16 13:49:36,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:49:36,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:36,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:36,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:37,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:37,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:37,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:37,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:37,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:37,280 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:37,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:49:37,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:49:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:37,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126394875] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:37,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:37,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:49:37,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313643906] [2022-02-16 13:49:37,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:37,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:49:37,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:49:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:49:37,294 INFO L87 Difference]: Start difference. First operand 1011 states and 2992 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:37,589 INFO L93 Difference]: Finished difference Result 1283 states and 3699 transitions. [2022-02-16 13:49:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:49:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:37,591 INFO L225 Difference]: With dead ends: 1283 [2022-02-16 13:49:37,591 INFO L226 Difference]: Without dead ends: 1283 [2022-02-16 13:49:37,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:49:37,591 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:37,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 28 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 468 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-02-16 13:49:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-02-16 13:49:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1013. [2022-02-16 13:49:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.9624505928853755) internal successors, (2998), 1012 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2998 transitions. [2022-02-16 13:49:37,603 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2998 transitions. Word has length 17 [2022-02-16 13:49:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:37,603 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 2998 transitions. [2022-02-16 13:49:37,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2998 transitions. [2022-02-16 13:49:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:37,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:37,604 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:37,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:37,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-02-16 13:49:37,819 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:37,819 INFO L85 PathProgramCache]: Analyzing trace with hash 156957297, now seen corresponding path program 286 times [2022-02-16 13:49:37,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:37,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372492110] [2022-02-16 13:49:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:37,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:37,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:37,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372492110] [2022-02-16 13:49:37,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372492110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:37,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808679224] [2022-02-16 13:49:37,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:37,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:37,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:37,916 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:37,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-02-16 13:49:37,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:37,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:37,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:37,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:38,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:38,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:49:38,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:38,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:49:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:38,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:38,183 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:38,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:49:38,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:38,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808679224] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:38,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:38,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:49:38,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643449024] [2022-02-16 13:49:38,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:38,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:49:38,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:38,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:49:38,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:49:38,197 INFO L87 Difference]: Start difference. First operand 1013 states and 2998 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:38,414 INFO L93 Difference]: Finished difference Result 1263 states and 3658 transitions. [2022-02-16 13:49:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:49:38,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:38,415 INFO L225 Difference]: With dead ends: 1263 [2022-02-16 13:49:38,415 INFO L226 Difference]: Without dead ends: 1259 [2022-02-16 13:49:38,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:49:38,416 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:38,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 50 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 328 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-02-16 13:49:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-02-16 13:49:38,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1013. [2022-02-16 13:49:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.9614624505928853) internal successors, (2997), 1012 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:38,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2997 transitions. [2022-02-16 13:49:38,427 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2997 transitions. Word has length 17 [2022-02-16 13:49:38,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:38,427 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 2997 transitions. [2022-02-16 13:49:38,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:38,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2997 transitions. [2022-02-16 13:49:38,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:38,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:38,428 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:38,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:38,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-02-16 13:49:38,644 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1934947405, now seen corresponding path program 287 times [2022-02-16 13:49:38,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:38,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692963897] [2022-02-16 13:49:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:38,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:38,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:38,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692963897] [2022-02-16 13:49:38,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692963897] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:38,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771078102] [2022-02-16 13:49:38,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:38,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:38,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:38,740 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:38,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-02-16 13:49:38,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:49:38,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:38,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:38,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:38,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:38,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:38,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:38,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:38,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:39,057 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:39,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:49:39,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:49:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:39,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771078102] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:39,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:39,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:49:39,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763612340] [2022-02-16 13:49:39,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:39,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:39,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:39,074 INFO L87 Difference]: Start difference. First operand 1013 states and 2997 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:39,529 INFO L93 Difference]: Finished difference Result 1300 states and 3735 transitions. [2022-02-16 13:49:39,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:49:39,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:39,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:39,531 INFO L225 Difference]: With dead ends: 1300 [2022-02-16 13:49:39,531 INFO L226 Difference]: Without dead ends: 1300 [2022-02-16 13:49:39,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:49:39,532 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:39,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 62 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 662 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-02-16 13:49:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-02-16 13:49:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1017. [2022-02-16 13:49:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.9616141732283463) internal successors, (3009), 1016 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3009 transitions. [2022-02-16 13:49:39,544 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3009 transitions. Word has length 17 [2022-02-16 13:49:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:39,544 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 3009 transitions. [2022-02-16 13:49:39,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3009 transitions. [2022-02-16 13:49:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:39,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:39,545 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:39,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:39,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-02-16 13:49:39,761 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:39,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:39,761 INFO L85 PathProgramCache]: Analyzing trace with hash -380898281, now seen corresponding path program 288 times [2022-02-16 13:49:39,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:39,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599677708] [2022-02-16 13:49:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:39,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:39,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:39,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599677708] [2022-02-16 13:49:39,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599677708] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:39,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013943335] [2022-02-16 13:49:39,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:39,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:39,876 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:39,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-02-16 13:49:39,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:49:39,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:39,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:40,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:40,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:49:40,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:40,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:49:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:40,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:40,281 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:40,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:49:40,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:40,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013943335] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:40,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:40,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:49:40,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095013870] [2022-02-16 13:49:40,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:40,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:40,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:40,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:40,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:40,303 INFO L87 Difference]: Start difference. First operand 1017 states and 3009 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:40,708 INFO L93 Difference]: Finished difference Result 1270 states and 3670 transitions. [2022-02-16 13:49:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:49:40,708 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:40,710 INFO L225 Difference]: With dead ends: 1270 [2022-02-16 13:49:40,710 INFO L226 Difference]: Without dead ends: 1267 [2022-02-16 13:49:40,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:49:40,710 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:40,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 526 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-02-16 13:49:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-02-16 13:49:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1017. [2022-02-16 13:49:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.9606299212598426) internal successors, (3008), 1016 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3008 transitions. [2022-02-16 13:49:40,722 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3008 transitions. Word has length 17 [2022-02-16 13:49:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:40,722 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 3008 transitions. [2022-02-16 13:49:40,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3008 transitions. [2022-02-16 13:49:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:40,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:40,723 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:40,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:40,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-02-16 13:49:40,929 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:40,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1695305067, now seen corresponding path program 289 times [2022-02-16 13:49:40,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:40,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065111098] [2022-02-16 13:49:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:40,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:41,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:41,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065111098] [2022-02-16 13:49:41,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065111098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:41,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254405289] [2022-02-16 13:49:41,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:41,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:41,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:41,033 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:41,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-02-16 13:49:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:41,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:41,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:41,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:41,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:41,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:41,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:41,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:41,355 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:41,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:49:41,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:49:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:41,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254405289] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:41,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:41,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:49:41,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884491699] [2022-02-16 13:49:41,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:41,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:41,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:41,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:41,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:41,366 INFO L87 Difference]: Start difference. First operand 1017 states and 3008 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:42,415 INFO L93 Difference]: Finished difference Result 1401 states and 3911 transitions. [2022-02-16 13:49:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-16 13:49:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:42,417 INFO L225 Difference]: With dead ends: 1401 [2022-02-16 13:49:42,417 INFO L226 Difference]: Without dead ends: 1401 [2022-02-16 13:49:42,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:49:42,418 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 92 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:42,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 102 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 893 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2022-02-16 13:49:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-02-16 13:49:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1029. [2022-02-16 13:49:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 2.9659533073929962) internal successors, (3049), 1028 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3049 transitions. [2022-02-16 13:49:42,430 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3049 transitions. Word has length 17 [2022-02-16 13:49:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:42,430 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3049 transitions. [2022-02-16 13:49:42,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3049 transitions. [2022-02-16 13:49:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:42,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:42,431 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:42,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:42,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:42,647 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:42,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1679961521, now seen corresponding path program 290 times [2022-02-16 13:49:42,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:42,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119648953] [2022-02-16 13:49:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:42,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:42,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:42,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119648953] [2022-02-16 13:49:42,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119648953] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:42,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541739445] [2022-02-16 13:49:42,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:42,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:42,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:42,734 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:42,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-02-16 13:49:42,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:42,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:42,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:42,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:42,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:42,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:49:42,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:42,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:49:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:42,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:43,113 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:43,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:49:43,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:43,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541739445] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:43,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:43,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:49:43,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768786298] [2022-02-16 13:49:43,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:43,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:43,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:43,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:43,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:43,134 INFO L87 Difference]: Start difference. First operand 1029 states and 3049 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:43,565 INFO L93 Difference]: Finished difference Result 1285 states and 3717 transitions. [2022-02-16 13:49:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:49:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:43,567 INFO L225 Difference]: With dead ends: 1285 [2022-02-16 13:49:43,567 INFO L226 Difference]: Without dead ends: 1283 [2022-02-16 13:49:43,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:49:43,568 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:43,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 60 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 634 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-02-16 13:49:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-02-16 13:49:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1031. [2022-02-16 13:49:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.9650485436893206) internal successors, (3054), 1030 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3054 transitions. [2022-02-16 13:49:43,581 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3054 transitions. Word has length 17 [2022-02-16 13:49:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:43,581 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 3054 transitions. [2022-02-16 13:49:43,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3054 transitions. [2022-02-16 13:49:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:43,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:43,582 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:43,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-02-16 13:49:43,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-02-16 13:49:43,783 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1687574669, now seen corresponding path program 291 times [2022-02-16 13:49:43,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:43,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683120440] [2022-02-16 13:49:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:43,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:43,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:43,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683120440] [2022-02-16 13:49:43,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683120440] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:43,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111458972] [2022-02-16 13:49:43,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:43,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:43,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:43,889 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:43,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-02-16 13:49:43,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:49:43,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:43,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:43,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:44,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:44,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:44,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:44,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:44,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:44,203 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:44,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:49:44,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:49:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:44,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111458972] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:44,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:44,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:49:44,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261273243] [2022-02-16 13:49:44,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:44,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:44,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:44,217 INFO L87 Difference]: Start difference. First operand 1031 states and 3054 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:45,753 INFO L93 Difference]: Finished difference Result 1452 states and 3962 transitions. [2022-02-16 13:49:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 13:49:45,753 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:45,755 INFO L225 Difference]: With dead ends: 1452 [2022-02-16 13:49:45,755 INFO L226 Difference]: Without dead ends: 1452 [2022-02-16 13:49:45,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=419, Invalid=2443, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 13:49:45,756 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 161 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:45,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 112 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:49:45,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2022-02-16 13:49:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1029. [2022-02-16 13:49:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 2.964980544747082) internal successors, (3048), 1028 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3048 transitions. [2022-02-16 13:49:45,777 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3048 transitions. Word has length 17 [2022-02-16 13:49:45,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:45,777 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3048 transitions. [2022-02-16 13:49:45,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3048 transitions. [2022-02-16 13:49:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:45,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:45,778 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:45,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-02-16 13:49:45,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-02-16 13:49:45,991 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash -885958441, now seen corresponding path program 292 times [2022-02-16 13:49:45,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:45,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820408099] [2022-02-16 13:49:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:45,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:46,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:46,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820408099] [2022-02-16 13:49:46,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820408099] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:46,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481540618] [2022-02-16 13:49:46,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:46,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:46,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:46,111 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:46,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-02-16 13:49:46,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:46,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:46,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:46,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:46,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:46,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:46,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:46,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:46,522 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:46,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:49:46,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:46,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481540618] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:46,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:46,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:49:46,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779850675] [2022-02-16 13:49:46,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:46,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:49:46,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:49:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:46,543 INFO L87 Difference]: Start difference. First operand 1029 states and 3048 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:47,192 INFO L93 Difference]: Finished difference Result 1308 states and 3745 transitions. [2022-02-16 13:49:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:49:47,193 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:47,195 INFO L225 Difference]: With dead ends: 1308 [2022-02-16 13:49:47,195 INFO L226 Difference]: Without dead ends: 1306 [2022-02-16 13:49:47,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:49:47,195 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 108 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:47,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 70 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:49:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-02-16 13:49:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1031. [2022-02-16 13:49:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.9650485436893206) internal successors, (3054), 1030 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3054 transitions. [2022-02-16 13:49:47,207 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3054 transitions. Word has length 17 [2022-02-16 13:49:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:47,207 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 3054 transitions. [2022-02-16 13:49:47,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3054 transitions. [2022-02-16 13:49:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:47,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:47,208 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:47,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:47,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-02-16 13:49:47,423 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash 832385265, now seen corresponding path program 293 times [2022-02-16 13:49:47,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:47,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596758314] [2022-02-16 13:49:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:47,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:47,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:47,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596758314] [2022-02-16 13:49:47,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596758314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:47,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932657668] [2022-02-16 13:49:47,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:47,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:47,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:47,545 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:47,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-02-16 13:49:47,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:49:47,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:47,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:47,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:47,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:47,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:47,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:47,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:47,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:47,922 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:49:47,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-16 13:49:47,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:47,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932657668] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:47,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:47,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:49:47,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793998480] [2022-02-16 13:49:47,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:47,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:47,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:47,941 INFO L87 Difference]: Start difference. First operand 1031 states and 3054 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:48,366 INFO L93 Difference]: Finished difference Result 1298 states and 3732 transitions. [2022-02-16 13:49:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:49:48,366 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:48,368 INFO L225 Difference]: With dead ends: 1298 [2022-02-16 13:49:48,368 INFO L226 Difference]: Without dead ends: 1298 [2022-02-16 13:49:48,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:49:48,368 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 89 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:48,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 110 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:49:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-02-16 13:49:48,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1029. [2022-02-16 13:49:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 2.963035019455253) internal successors, (3046), 1028 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3046 transitions. [2022-02-16 13:49:48,380 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3046 transitions. Word has length 17 [2022-02-16 13:49:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:48,380 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3046 transitions. [2022-02-16 13:49:48,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:48,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3046 transitions. [2022-02-16 13:49:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:48,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:48,381 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:48,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:48,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:48,595 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash 111872989, now seen corresponding path program 294 times [2022-02-16 13:49:48,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:48,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098199885] [2022-02-16 13:49:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:48,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:48,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:48,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098199885] [2022-02-16 13:49:48,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098199885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:48,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834683570] [2022-02-16 13:49:48,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:48,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:48,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:48,687 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:48,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-02-16 13:49:48,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:49:48,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:48,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:48,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:48,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:48,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:48,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:48,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:48,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:49,000 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:49,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:49,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:49,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834683570] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:49,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:49,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:49:49,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909865365] [2022-02-16 13:49:49,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:49,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:49,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:49,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:49,022 INFO L87 Difference]: Start difference. First operand 1029 states and 3046 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:49,219 INFO L93 Difference]: Finished difference Result 1124 states and 3264 transitions. [2022-02-16 13:49:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:49:49,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:49,221 INFO L225 Difference]: With dead ends: 1124 [2022-02-16 13:49:49,221 INFO L226 Difference]: Without dead ends: 1124 [2022-02-16 13:49:49,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:49,221 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:49,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 58 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 405 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2022-02-16 13:49:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-02-16 13:49:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1036. [2022-02-16 13:49:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.9642512077294687) internal successors, (3068), 1035 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3068 transitions. [2022-02-16 13:49:49,232 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3068 transitions. Word has length 17 [2022-02-16 13:49:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:49,233 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 3068 transitions. [2022-02-16 13:49:49,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:49,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3068 transitions. [2022-02-16 13:49:49,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:49,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:49,234 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:49,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:49,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:49,450 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:49,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1042755577, now seen corresponding path program 295 times [2022-02-16 13:49:49,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:49,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954774125] [2022-02-16 13:49:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:49,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:49,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:49,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954774125] [2022-02-16 13:49:49,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954774125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:49,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658105009] [2022-02-16 13:49:49,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:49,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:49,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:49,517 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:49,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-02-16 13:49:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:49,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:49,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:49:49,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:49,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:49:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:49,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:49,743 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:49,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:49,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:49,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658105009] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:49,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:49,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:49:49,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166189436] [2022-02-16 13:49:49,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:49,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:49,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:49,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:49,760 INFO L87 Difference]: Start difference. First operand 1036 states and 3068 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:49,908 INFO L93 Difference]: Finished difference Result 1114 states and 3241 transitions. [2022-02-16 13:49:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:49:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:49,910 INFO L225 Difference]: With dead ends: 1114 [2022-02-16 13:49:49,910 INFO L226 Difference]: Without dead ends: 1109 [2022-02-16 13:49:49,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:49,910 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:49,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 22 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 334 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-02-16 13:49:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-02-16 13:49:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1036. [2022-02-16 13:49:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.9632850241545894) internal successors, (3067), 1035 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3067 transitions. [2022-02-16 13:49:49,921 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3067 transitions. Word has length 17 [2022-02-16 13:49:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:49,921 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 3067 transitions. [2022-02-16 13:49:49,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3067 transitions. [2022-02-16 13:49:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:49,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:49,923 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:49,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:50,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:50,138 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:50,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1049149125, now seen corresponding path program 296 times [2022-02-16 13:49:50,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:50,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961047485] [2022-02-16 13:49:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:50,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:50,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:50,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961047485] [2022-02-16 13:49:50,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961047485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:50,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378142464] [2022-02-16 13:49:50,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:50,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:50,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:50,228 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:50,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-02-16 13:49:50,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:50,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:50,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:50,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:50,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:50,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:50,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:50,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:50,501 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:50,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:50,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:50,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378142464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:50,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:50,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:49:50,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058190869] [2022-02-16 13:49:50,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:50,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:49:50,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:50,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:49:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:49:50,518 INFO L87 Difference]: Start difference. First operand 1036 states and 3067 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:50,823 INFO L93 Difference]: Finished difference Result 1141 states and 3296 transitions. [2022-02-16 13:49:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:49:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:50,825 INFO L225 Difference]: With dead ends: 1141 [2022-02-16 13:49:50,825 INFO L226 Difference]: Without dead ends: 1138 [2022-02-16 13:49:50,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:49:50,826 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:50,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 52 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 539 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-02-16 13:49:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-02-16 13:49:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1032. [2022-02-16 13:49:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 2.962172647914646) internal successors, (3054), 1031 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3054 transitions. [2022-02-16 13:49:50,837 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3054 transitions. Word has length 17 [2022-02-16 13:49:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:50,837 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 3054 transitions. [2022-02-16 13:49:50,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3054 transitions. [2022-02-16 13:49:50,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:50,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:50,838 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:50,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:51,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:51,055 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash 504899999, now seen corresponding path program 297 times [2022-02-16 13:49:51,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:51,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129001457] [2022-02-16 13:49:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:51,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:51,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:51,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129001457] [2022-02-16 13:49:51,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129001457] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:51,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502427245] [2022-02-16 13:49:51,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:51,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:51,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:51,157 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:51,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-02-16 13:49:51,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:49:51,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:51,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:51,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:51,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:51,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:49:51,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:51,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:49:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:51,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:51,439 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:51,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:51,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:51,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502427245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:51,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:51,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:49:51,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967959878] [2022-02-16 13:49:51,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:51,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:49:51,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:49:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:49:51,455 INFO L87 Difference]: Start difference. First operand 1032 states and 3054 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:51,603 INFO L93 Difference]: Finished difference Result 1102 states and 3219 transitions. [2022-02-16 13:49:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:49:51,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:51,605 INFO L225 Difference]: With dead ends: 1102 [2022-02-16 13:49:51,605 INFO L226 Difference]: Without dead ends: 1096 [2022-02-16 13:49:51,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:51,605 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:51,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 370 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-02-16 13:49:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-02-16 13:49:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1032. [2022-02-16 13:49:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 2.9602327837051408) internal successors, (3052), 1031 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3052 transitions. [2022-02-16 13:49:51,616 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3052 transitions. Word has length 17 [2022-02-16 13:49:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:51,616 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 3052 transitions. [2022-02-16 13:49:51,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3052 transitions. [2022-02-16 13:49:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:51,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:51,617 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:51,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-02-16 13:49:51,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-02-16 13:49:51,825 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:51,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:51,825 INFO L85 PathProgramCache]: Analyzing trace with hash -809506787, now seen corresponding path program 298 times [2022-02-16 13:49:51,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:51,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274203939] [2022-02-16 13:49:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:51,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:51,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:51,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274203939] [2022-02-16 13:49:51,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274203939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:51,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306805025] [2022-02-16 13:49:51,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:51,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:51,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:51,931 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:51,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-02-16 13:49:51,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:51,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:51,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:51,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:52,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:52,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:52,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:52,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:52,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:52,214 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:52,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:52,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:52,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306805025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:52,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:52,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:49:52,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790734006] [2022-02-16 13:49:52,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:52,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:52,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:52,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:52,228 INFO L87 Difference]: Start difference. First operand 1032 states and 3052 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:52,866 INFO L93 Difference]: Finished difference Result 1217 states and 3448 transitions. [2022-02-16 13:49:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:49:52,866 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:52,868 INFO L225 Difference]: With dead ends: 1217 [2022-02-16 13:49:52,868 INFO L226 Difference]: Without dead ends: 1217 [2022-02-16 13:49:52,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=1508, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:49:52,868 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:52,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 118 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 722 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-02-16 13:49:52,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-02-16 13:49:52,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1047. [2022-02-16 13:49:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 2.9655831739961758) internal successors, (3102), 1046 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3102 transitions. [2022-02-16 13:49:52,880 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3102 transitions. Word has length 17 [2022-02-16 13:49:52,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:52,880 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3102 transitions. [2022-02-16 13:49:52,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3102 transitions. [2022-02-16 13:49:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:52,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:52,881 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:52,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:53,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-02-16 13:49:53,097 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:53,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1729207495, now seen corresponding path program 299 times [2022-02-16 13:49:53,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:53,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135301051] [2022-02-16 13:49:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:53,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:53,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:53,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135301051] [2022-02-16 13:49:53,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135301051] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:53,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095843159] [2022-02-16 13:49:53,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:53,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:53,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:53,171 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:53,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-02-16 13:49:53,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:49:53,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:53,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:53,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:53,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:53,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:49:53,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:53,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:49:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:53,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:53,482 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:53,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:53,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:53,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095843159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:53,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:53,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:49:53,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725468334] [2022-02-16 13:49:53,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:53,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:53,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:53,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:53,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:53,515 INFO L87 Difference]: Start difference. First operand 1047 states and 3102 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:53,840 INFO L93 Difference]: Finished difference Result 1133 states and 3297 transitions. [2022-02-16 13:49:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:49:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:53,842 INFO L225 Difference]: With dead ends: 1133 [2022-02-16 13:49:53,842 INFO L226 Difference]: Without dead ends: 1131 [2022-02-16 13:49:53,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:49:53,842 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:53,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 516 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-02-16 13:49:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-02-16 13:49:53,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1052. [2022-02-16 13:49:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 2.965746907706946) internal successors, (3117), 1051 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3117 transitions. [2022-02-16 13:49:53,854 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3117 transitions. Word has length 17 [2022-02-16 13:49:53,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:53,854 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 3117 transitions. [2022-02-16 13:49:53,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3117 transitions. [2022-02-16 13:49:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:53,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:53,856 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:53,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:54,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-02-16 13:49:54,071 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash -801776389, now seen corresponding path program 300 times [2022-02-16 13:49:54,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:54,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459653912] [2022-02-16 13:49:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:54,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:54,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:54,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459653912] [2022-02-16 13:49:54,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459653912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:54,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714592557] [2022-02-16 13:49:54,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:54,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:54,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:54,186 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:54,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-02-16 13:49:54,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:49:54,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:54,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:54,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:54,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:54,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:54,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:54,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:54,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:54,524 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:54,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:54,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:54,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714592557] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:54,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:54,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:49:54,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054599113] [2022-02-16 13:49:54,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:54,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:54,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:54,546 INFO L87 Difference]: Start difference. First operand 1052 states and 3117 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:55,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:55,762 INFO L93 Difference]: Finished difference Result 1295 states and 3539 transitions. [2022-02-16 13:49:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 13:49:55,762 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:55,764 INFO L225 Difference]: With dead ends: 1295 [2022-02-16 13:49:55,764 INFO L226 Difference]: Without dead ends: 1295 [2022-02-16 13:49:55,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 13:49:55,765 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 145 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:55,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 106 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:49:55,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2022-02-16 13:49:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1039. [2022-02-16 13:49:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.9614643545279384) internal successors, (3074), 1038 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:55,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3074 transitions. [2022-02-16 13:49:55,777 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3074 transitions. Word has length 17 [2022-02-16 13:49:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:55,777 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 3074 transitions. [2022-02-16 13:49:55,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3074 transitions. [2022-02-16 13:49:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:55,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:55,778 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:55,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:55,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-02-16 13:49:55,991 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:55,992 INFO L85 PathProgramCache]: Analyzing trace with hash -160161, now seen corresponding path program 301 times [2022-02-16 13:49:55,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:55,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874443304] [2022-02-16 13:49:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:55,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:56,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:56,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874443304] [2022-02-16 13:49:56,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874443304] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:56,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371460747] [2022-02-16 13:49:56,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:56,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:56,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:56,106 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:56,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-02-16 13:49:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:56,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:56,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:56,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:56,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:56,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:56,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:56,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:56,479 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:56,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:56,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:56,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371460747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:56,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:56,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:49:56,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803676212] [2022-02-16 13:49:56,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:56,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:56,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:56,506 INFO L87 Difference]: Start difference. First operand 1039 states and 3074 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:56,885 INFO L93 Difference]: Finished difference Result 1140 states and 3282 transitions. [2022-02-16 13:49:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:49:56,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:56,887 INFO L225 Difference]: With dead ends: 1140 [2022-02-16 13:49:56,887 INFO L226 Difference]: Without dead ends: 1137 [2022-02-16 13:49:56,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:49:56,887 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 91 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:56,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 46 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-02-16 13:49:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1042. [2022-02-16 13:49:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.9615754082612873) internal successors, (3083), 1041 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3083 transitions. [2022-02-16 13:49:56,898 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3083 transitions. Word has length 17 [2022-02-16 13:49:56,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:56,898 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 3083 transitions. [2022-02-16 13:49:56,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3083 transitions. [2022-02-16 13:49:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:56,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:56,899 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:56,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:57,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-02-16 13:49:57,100 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1718183545, now seen corresponding path program 302 times [2022-02-16 13:49:57,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:57,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514137647] [2022-02-16 13:49:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:57,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:57,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:57,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514137647] [2022-02-16 13:49:57,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514137647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:57,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723410675] [2022-02-16 13:49:57,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:57,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:57,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:57,223 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:57,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-02-16 13:49:57,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:57,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:57,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:57,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:57,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:57,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:49:57,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:57,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:49:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:57,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:57,575 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:57,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:57,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:57,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723410675] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:57,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:57,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:49:57,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941725361] [2022-02-16 13:49:57,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:57,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:57,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:57,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:57,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:57,602 INFO L87 Difference]: Start difference. First operand 1042 states and 3083 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:57,916 INFO L93 Difference]: Finished difference Result 1137 states and 3279 transitions. [2022-02-16 13:49:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:49:57,917 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:57,918 INFO L225 Difference]: With dead ends: 1137 [2022-02-16 13:49:57,918 INFO L226 Difference]: Without dead ends: 1137 [2022-02-16 13:49:57,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:57,919 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:57,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 100 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-02-16 13:49:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1036. [2022-02-16 13:49:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.960386473429952) internal successors, (3064), 1035 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3064 transitions. [2022-02-16 13:49:57,930 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3064 transitions. Word has length 17 [2022-02-16 13:49:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:57,931 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 3064 transitions. [2022-02-16 13:49:57,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:57,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3064 transitions. [2022-02-16 13:49:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:57,932 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:57,932 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:57,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:58,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-02-16 13:49:58,135 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:58,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2143240713, now seen corresponding path program 303 times [2022-02-16 13:49:58,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:58,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774854995] [2022-02-16 13:49:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:58,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:58,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:58,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774854995] [2022-02-16 13:49:58,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774854995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:58,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237444107] [2022-02-16 13:49:58,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:58,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:58,238 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:58,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-02-16 13:49:58,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:49:58,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:58,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:58,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:58,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:49:58,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:58,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:49:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:58,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:58,531 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:58,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:49:58,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:49:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:58,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237444107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:58,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:58,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:49:58,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246725851] [2022-02-16 13:49:58,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:58,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:58,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:58,558 INFO L87 Difference]: Start difference. First operand 1036 states and 3064 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:58,807 INFO L93 Difference]: Finished difference Result 1138 states and 3295 transitions. [2022-02-16 13:49:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:49:58,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:58,808 INFO L225 Difference]: With dead ends: 1138 [2022-02-16 13:49:58,808 INFO L226 Difference]: Without dead ends: 1138 [2022-02-16 13:49:58,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:58,809 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:58,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 24 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 425 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-02-16 13:49:58,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-02-16 13:49:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1039. [2022-02-16 13:49:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.9605009633911368) internal successors, (3073), 1038 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3073 transitions. [2022-02-16 13:49:58,820 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3073 transitions. Word has length 17 [2022-02-16 13:49:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:58,820 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 3073 transitions. [2022-02-16 13:49:58,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3073 transitions. [2022-02-16 13:49:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:58,821 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:58,821 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:58,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:59,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-02-16 13:49:59,021 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:49:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:59,022 INFO L85 PathProgramCache]: Analyzing trace with hash -589191589, now seen corresponding path program 304 times [2022-02-16 13:49:59,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:59,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294860641] [2022-02-16 13:49:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:59,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:59,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:59,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294860641] [2022-02-16 13:49:59,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294860641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:59,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655217304] [2022-02-16 13:49:59,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:59,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:59,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:59,123 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:59,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-02-16 13:49:59,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:59,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:59,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:49:59,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:59,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:59,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:49:59,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:49:59,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:49:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:59,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:59,439 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:49:59,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:49:59,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:49:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:59,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655217304] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:59,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:59,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:49:59,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781308591] [2022-02-16 13:49:59,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:59,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:59,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:59,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:59,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:59,470 INFO L87 Difference]: Start difference. First operand 1039 states and 3073 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:59,781 INFO L93 Difference]: Finished difference Result 1114 states and 3243 transitions. [2022-02-16 13:49:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:49:59,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:49:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:59,783 INFO L225 Difference]: With dead ends: 1114 [2022-02-16 13:49:59,783 INFO L226 Difference]: Without dead ends: 1108 [2022-02-16 13:49:59,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:49:59,783 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:59,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 410 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-02-16 13:49:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-02-16 13:49:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1039. [2022-02-16 13:49:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.9576107899807322) internal successors, (3070), 1038 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3070 transitions. [2022-02-16 13:49:59,795 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3070 transitions. Word has length 17 [2022-02-16 13:49:59,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:59,795 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 3070 transitions. [2022-02-16 13:49:59,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3070 transitions. [2022-02-16 13:49:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:49:59,796 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:59,796 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:59,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:00,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:00,012 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash -288346791, now seen corresponding path program 305 times [2022-02-16 13:50:00,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:00,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343716895] [2022-02-16 13:50:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:00,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:00,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:00,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343716895] [2022-02-16 13:50:00,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343716895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:00,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031457437] [2022-02-16 13:50:00,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:00,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:00,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:00,160 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:00,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-02-16 13:50:00,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 13:50:00,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:00,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:00,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:00,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:00,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:00,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:00,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:00,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:00,422 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:00,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:00,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:00,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031457437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:00,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:00,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:50:00,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303048942] [2022-02-16 13:50:00,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:00,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:00,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:00,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:00,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:00,443 INFO L87 Difference]: Start difference. First operand 1039 states and 3070 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:01,229 INFO L93 Difference]: Finished difference Result 1193 states and 3391 transitions. [2022-02-16 13:50:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 13:50:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:01,231 INFO L225 Difference]: With dead ends: 1193 [2022-02-16 13:50:01,231 INFO L226 Difference]: Without dead ends: 1191 [2022-02-16 13:50:01,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 13:50:01,232 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:01,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 74 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:50:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-02-16 13:50:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1054. [2022-02-16 13:50:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.9648622981956314) internal successors, (3122), 1053 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3122 transitions. [2022-02-16 13:50:01,244 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3122 transitions. Word has length 17 [2022-02-16 13:50:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:01,244 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 3122 transitions. [2022-02-16 13:50:01,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3122 transitions. [2022-02-16 13:50:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:01,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:01,245 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:01,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:01,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:01,460 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash -830512995, now seen corresponding path program 306 times [2022-02-16 13:50:01,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:01,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560035576] [2022-02-16 13:50:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:01,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:01,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:01,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560035576] [2022-02-16 13:50:01,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560035576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:01,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224495756] [2022-02-16 13:50:01,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:01,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:01,559 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:01,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-02-16 13:50:01,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:50:01,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:01,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:01,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:01,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:01,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:01,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:01,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:01,833 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:01,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:50:01,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:50:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:01,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224495756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:01,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:01,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:50:01,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999130126] [2022-02-16 13:50:01,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:01,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:01,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:01,861 INFO L87 Difference]: Start difference. First operand 1054 states and 3122 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:02,207 INFO L93 Difference]: Finished difference Result 1270 states and 3566 transitions. [2022-02-16 13:50:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:50:02,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:02,209 INFO L225 Difference]: With dead ends: 1270 [2022-02-16 13:50:02,209 INFO L226 Difference]: Without dead ends: 1270 [2022-02-16 13:50:02,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:50:02,209 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:02,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 82 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 645 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-02-16 13:50:02,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2022-02-16 13:50:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1080. [2022-02-16 13:50:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 2.9731232622798887) internal successors, (3208), 1079 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3208 transitions. [2022-02-16 13:50:02,221 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3208 transitions. Word has length 17 [2022-02-16 13:50:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:02,221 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 3208 transitions. [2022-02-16 13:50:02,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3208 transitions. [2022-02-16 13:50:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:02,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:02,222 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:02,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:02,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:02,435 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1750213703, now seen corresponding path program 307 times [2022-02-16 13:50:02,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:02,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455829409] [2022-02-16 13:50:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:02,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:02,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:02,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455829409] [2022-02-16 13:50:02,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455829409] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:02,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276658538] [2022-02-16 13:50:02,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:02,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:02,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:02,501 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:02,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-02-16 13:50:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:02,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:02,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:02,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:02,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:02,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:02,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:02,782 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:02,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:50:02,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:02,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276658538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:02,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:02,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:50:02,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671276982] [2022-02-16 13:50:02,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:02,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:02,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:02,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:02,809 INFO L87 Difference]: Start difference. First operand 1080 states and 3208 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:03,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:03,304 INFO L93 Difference]: Finished difference Result 1198 states and 3429 transitions. [2022-02-16 13:50:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:50:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:03,306 INFO L225 Difference]: With dead ends: 1198 [2022-02-16 13:50:03,306 INFO L226 Difference]: Without dead ends: 1194 [2022-02-16 13:50:03,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:50:03,307 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:03,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 90 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 859 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2022-02-16 13:50:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-02-16 13:50:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1080. [2022-02-16 13:50:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 2.964782205746061) internal successors, (3199), 1079 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3199 transitions. [2022-02-16 13:50:03,319 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3199 transitions. Word has length 17 [2022-02-16 13:50:03,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:03,319 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 3199 transitions. [2022-02-16 13:50:03,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3199 transitions. [2022-02-16 13:50:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:03,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:03,320 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:03,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-02-16 13:50:03,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-02-16 13:50:03,535 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash 784738589, now seen corresponding path program 308 times [2022-02-16 13:50:03,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:03,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393014399] [2022-02-16 13:50:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:03,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:03,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:03,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393014399] [2022-02-16 13:50:03,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393014399] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:03,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164677881] [2022-02-16 13:50:03,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:03,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:03,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:03,623 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:03,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-02-16 13:50:03,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:03,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:03,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:03,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:03,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:03,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:03,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:03,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:03,824 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:03,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:50:03,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:50:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:03,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164677881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:03,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:03,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:50:03,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674821176] [2022-02-16 13:50:03,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:03,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:03,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:03,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:03,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:03,840 INFO L87 Difference]: Start difference. First operand 1080 states and 3199 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:04,618 INFO L93 Difference]: Finished difference Result 1310 states and 3612 transitions. [2022-02-16 13:50:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-16 13:50:04,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:04,619 INFO L225 Difference]: With dead ends: 1310 [2022-02-16 13:50:04,619 INFO L226 Difference]: Without dead ends: 1307 [2022-02-16 13:50:04,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=2441, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 13:50:04,620 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:04,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 240 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:50:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-02-16 13:50:04,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1079. [2022-02-16 13:50:04,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 2.950834879406308) internal successors, (3181), 1078 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3181 transitions. [2022-02-16 13:50:04,632 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3181 transitions. Word has length 17 [2022-02-16 13:50:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:04,632 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 3181 transitions. [2022-02-16 13:50:04,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3181 transitions. [2022-02-16 13:50:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:04,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:04,633 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:04,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:04,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:04,847 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:04,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1982779703, now seen corresponding path program 309 times [2022-02-16 13:50:04,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:04,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688845267] [2022-02-16 13:50:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:04,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:04,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:04,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688845267] [2022-02-16 13:50:04,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688845267] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:04,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287507127] [2022-02-16 13:50:04,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:04,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:04,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:04,908 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:04,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-02-16 13:50:04,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:50:04,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:04,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-16 13:50:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:04,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:04,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:04,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:04,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:05,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:05,082 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:05,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:50:05,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:05,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287507127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:05,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:05,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:50:05,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853746151] [2022-02-16 13:50:05,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:05,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:05,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:05,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:05,102 INFO L87 Difference]: Start difference. First operand 1079 states and 3181 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:05,546 INFO L93 Difference]: Finished difference Result 1327 states and 3744 transitions. [2022-02-16 13:50:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:50:05,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:05,549 INFO L225 Difference]: With dead ends: 1327 [2022-02-16 13:50:05,549 INFO L226 Difference]: Without dead ends: 1327 [2022-02-16 13:50:05,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:50:05,549 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 83 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:05,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 108 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-02-16 13:50:05,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1140. [2022-02-16 13:50:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 2.989464442493415) internal successors, (3405), 1139 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3405 transitions. [2022-02-16 13:50:05,562 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3405 transitions. Word has length 17 [2022-02-16 13:50:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:05,562 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3405 transitions. [2022-02-16 13:50:05,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3405 transitions. [2022-02-16 13:50:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:05,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:05,564 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:05,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:05,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-02-16 13:50:05,780 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:05,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1510571365, now seen corresponding path program 310 times [2022-02-16 13:50:05,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:05,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308528696] [2022-02-16 13:50:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:05,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:05,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:05,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308528696] [2022-02-16 13:50:05,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308528696] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:05,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088802744] [2022-02-16 13:50:05,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:05,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:05,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:05,859 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:05,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-02-16 13:50:05,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:05,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:05,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:05,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:05,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:05,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:05,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:05,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:06,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:06,156 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:06,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:50:06,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:50:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:06,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088802744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:06,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:06,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:50:06,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417946056] [2022-02-16 13:50:06,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:06,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:06,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:06,187 INFO L87 Difference]: Start difference. First operand 1140 states and 3405 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:07,009 INFO L93 Difference]: Finished difference Result 1362 states and 3831 transitions. [2022-02-16 13:50:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-16 13:50:07,010 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:07,012 INFO L225 Difference]: With dead ends: 1362 [2022-02-16 13:50:07,012 INFO L226 Difference]: Without dead ends: 1358 [2022-02-16 13:50:07,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2022-02-16 13:50:07,012 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:07,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 132 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:50:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-02-16 13:50:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1163. [2022-02-16 13:50:07,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 2.989672977624785) internal successors, (3474), 1162 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3474 transitions. [2022-02-16 13:50:07,026 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3474 transitions. Word has length 17 [2022-02-16 13:50:07,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:07,026 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 3474 transitions. [2022-02-16 13:50:07,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:07,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3474 transitions. [2022-02-16 13:50:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:07,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:07,027 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:07,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:07,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-02-16 13:50:07,228 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:07,228 INFO L85 PathProgramCache]: Analyzing trace with hash 207772341, now seen corresponding path program 311 times [2022-02-16 13:50:07,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:07,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072188300] [2022-02-16 13:50:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:07,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:07,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:07,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072188300] [2022-02-16 13:50:07,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072188300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:07,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894614555] [2022-02-16 13:50:07,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:07,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:07,310 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:07,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-02-16 13:50:07,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:50:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:07,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:07,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:07,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:07,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:07,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:07,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:07,557 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:07,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:50:07,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:50:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:07,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894614555] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:07,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:07,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:50:07,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852152497] [2022-02-16 13:50:07,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:07,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:07,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:07,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:07,584 INFO L87 Difference]: Start difference. First operand 1163 states and 3474 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:08,123 INFO L93 Difference]: Finished difference Result 1345 states and 3790 transitions. [2022-02-16 13:50:08,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:50:08,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:08,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:08,125 INFO L225 Difference]: With dead ends: 1345 [2022-02-16 13:50:08,125 INFO L226 Difference]: Without dead ends: 1345 [2022-02-16 13:50:08,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:50:08,125 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:08,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 124 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:50:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-02-16 13:50:08,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1142. [2022-02-16 13:50:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 2.9754601226993866) internal successors, (3395), 1141 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3395 transitions. [2022-02-16 13:50:08,139 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3395 transitions. Word has length 17 [2022-02-16 13:50:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:08,139 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 3395 transitions. [2022-02-16 13:50:08,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3395 transitions. [2022-02-16 13:50:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:08,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:08,140 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:08,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:08,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-02-16 13:50:08,356 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1502840967, now seen corresponding path program 312 times [2022-02-16 13:50:08,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:08,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472335950] [2022-02-16 13:50:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:08,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:08,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:08,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472335950] [2022-02-16 13:50:08,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472335950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:08,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529613959] [2022-02-16 13:50:08,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:08,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:08,438 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:08,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-02-16 13:50:08,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:50:08,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:08,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:08,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:08,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:08,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:08,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:50:08,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:08,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:50:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:08,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:08,689 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:08,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:50:08,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:50:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:08,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529613959] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:08,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:08,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-16 13:50:08,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523932465] [2022-02-16 13:50:08,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:08,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:08,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:08,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:08,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:08,707 INFO L87 Difference]: Start difference. First operand 1142 states and 3395 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:09,024 INFO L93 Difference]: Finished difference Result 1307 states and 3702 transitions. [2022-02-16 13:50:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:50:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:09,026 INFO L225 Difference]: With dead ends: 1307 [2022-02-16 13:50:09,026 INFO L226 Difference]: Without dead ends: 1307 [2022-02-16 13:50:09,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:50:09,026 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:09,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 138 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-02-16 13:50:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1122. [2022-02-16 13:50:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.960749330954505) internal successors, (3319), 1121 states have internal predecessors, (3319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3319 transitions. [2022-02-16 13:50:09,039 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3319 transitions. Word has length 17 [2022-02-16 13:50:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:09,039 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 3319 transitions. [2022-02-16 13:50:09,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3319 transitions. [2022-02-16 13:50:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:09,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:09,040 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:09,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:09,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:09,256 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1801815893, now seen corresponding path program 313 times [2022-02-16 13:50:09,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:09,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310829581] [2022-02-16 13:50:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:09,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:09,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:09,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310829581] [2022-02-16 13:50:09,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310829581] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:09,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133436496] [2022-02-16 13:50:09,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:09,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:09,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:09,323 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:09,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-02-16 13:50:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:09,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:09,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:09,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:09,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:09,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:09,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:09,584 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:09,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:09,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:09,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133436496] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:09,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:09,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:50:09,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225011322] [2022-02-16 13:50:09,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:09,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:09,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:09,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:09,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:09,601 INFO L87 Difference]: Start difference. First operand 1122 states and 3319 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:09,809 INFO L93 Difference]: Finished difference Result 1235 states and 3529 transitions. [2022-02-16 13:50:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:50:09,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:09,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:09,818 INFO L225 Difference]: With dead ends: 1235 [2022-02-16 13:50:09,818 INFO L226 Difference]: Without dead ends: 1235 [2022-02-16 13:50:09,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:09,819 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:09,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 176 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 534 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-02-16 13:50:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-02-16 13:50:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1153. [2022-02-16 13:50:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 2.9618055555555554) internal successors, (3412), 1152 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3412 transitions. [2022-02-16 13:50:09,831 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3412 transitions. Word has length 17 [2022-02-16 13:50:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:09,831 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 3412 transitions. [2022-02-16 13:50:09,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3412 transitions. [2022-02-16 13:50:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:09,832 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:09,832 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:09,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-02-16 13:50:10,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:10,043 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:10,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:10,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1296755733, now seen corresponding path program 314 times [2022-02-16 13:50:10,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:10,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551587884] [2022-02-16 13:50:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:10,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:10,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:10,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551587884] [2022-02-16 13:50:10,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551587884] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:10,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732662817] [2022-02-16 13:50:10,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:10,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:10,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:10,150 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:10,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-02-16 13:50:10,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:10,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:10,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:10,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:10,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:10,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:10,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:10,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:10,428 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:10,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:10,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:10,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732662817] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:10,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:10,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:50:10,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892694015] [2022-02-16 13:50:10,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:10,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:10,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:10,446 INFO L87 Difference]: Start difference. First operand 1153 states and 3412 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:10,631 INFO L93 Difference]: Finished difference Result 1223 states and 3522 transitions. [2022-02-16 13:50:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:50:10,631 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:10,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:10,633 INFO L225 Difference]: With dead ends: 1223 [2022-02-16 13:50:10,633 INFO L226 Difference]: Without dead ends: 1223 [2022-02-16 13:50:10,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:10,633 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:10,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 106 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 448 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-02-16 13:50:10,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-02-16 13:50:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1155. [2022-02-16 13:50:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.9618717504332754) internal successors, (3418), 1154 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 3418 transitions. [2022-02-16 13:50:10,646 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 3418 transitions. Word has length 17 [2022-02-16 13:50:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:10,646 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 3418 transitions. [2022-02-16 13:50:10,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 3418 transitions. [2022-02-16 13:50:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:10,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:10,647 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:10,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:10,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:10,863 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1562268815, now seen corresponding path program 315 times [2022-02-16 13:50:10,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:10,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679340406] [2022-02-16 13:50:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:10,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:10,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:10,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679340406] [2022-02-16 13:50:10,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679340406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:10,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370594671] [2022-02-16 13:50:10,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:10,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:10,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:10,971 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:10,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-02-16 13:50:10,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:50:10,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:10,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:11,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:11,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:11,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:11,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:11,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:11,299 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:11,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:11,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:11,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370594671] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:11,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:11,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:50:11,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326945751] [2022-02-16 13:50:11,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:11,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:11,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:11,322 INFO L87 Difference]: Start difference. First operand 1155 states and 3418 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:11,669 INFO L93 Difference]: Finished difference Result 1226 states and 3513 transitions. [2022-02-16 13:50:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:50:11,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:11,671 INFO L225 Difference]: With dead ends: 1226 [2022-02-16 13:50:11,671 INFO L226 Difference]: Without dead ends: 1218 [2022-02-16 13:50:11,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:50:11,671 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 57 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:11,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 124 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 600 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-02-16 13:50:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2022-02-16 13:50:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1160. [2022-02-16 13:50:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 2.9534081104400345) internal successors, (3423), 1159 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3423 transitions. [2022-02-16 13:50:11,683 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3423 transitions. Word has length 17 [2022-02-16 13:50:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:11,683 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 3423 transitions. [2022-02-16 13:50:11,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3423 transitions. [2022-02-16 13:50:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:11,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:11,684 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:11,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:11,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:11,900 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:11,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:11,900 INFO L85 PathProgramCache]: Analyzing trace with hash 640793779, now seen corresponding path program 316 times [2022-02-16 13:50:11,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:11,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21412783] [2022-02-16 13:50:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:11,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:11,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:11,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21412783] [2022-02-16 13:50:11,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21412783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:11,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209329942] [2022-02-16 13:50:11,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:11,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:11,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:11,998 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:11,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-02-16 13:50:12,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:12,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:12,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:12,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:12,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:12,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:12,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:12,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:12,349 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:12,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:12,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:12,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209329942] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:12,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:12,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:50:12,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115305361] [2022-02-16 13:50:12,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:12,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:12,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:12,367 INFO L87 Difference]: Start difference. First operand 1160 states and 3423 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:13,121 INFO L93 Difference]: Finished difference Result 1303 states and 3665 transitions. [2022-02-16 13:50:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-16 13:50:13,122 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:13,123 INFO L225 Difference]: With dead ends: 1303 [2022-02-16 13:50:13,123 INFO L226 Difference]: Without dead ends: 1303 [2022-02-16 13:50:13,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=1707, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 13:50:13,124 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 111 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:13,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 122 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 565 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-02-16 13:50:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-02-16 13:50:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1161. [2022-02-16 13:50:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 2.963793103448276) internal successors, (3438), 1160 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 3438 transitions. [2022-02-16 13:50:13,136 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 3438 transitions. Word has length 17 [2022-02-16 13:50:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:13,137 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 3438 transitions. [2022-02-16 13:50:13,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 3438 transitions. [2022-02-16 13:50:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:13,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:13,138 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:13,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-02-16 13:50:13,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:13,351 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:13,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2100124393, now seen corresponding path program 317 times [2022-02-16 13:50:13,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:13,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111144866] [2022-02-16 13:50:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:13,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:13,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:13,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111144866] [2022-02-16 13:50:13,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111144866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:13,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883088573] [2022-02-16 13:50:13,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:13,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:13,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:13,440 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:13,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-02-16 13:50:13,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:50:13,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:13,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:13,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:13,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:13,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:13,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:13,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:13,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:13,764 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:13,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:13,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:13,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883088573] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:13,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:13,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:50:13,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860958431] [2022-02-16 13:50:13,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:13,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:13,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:13,786 INFO L87 Difference]: Start difference. First operand 1161 states and 3438 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:14,237 INFO L93 Difference]: Finished difference Result 1235 states and 3538 transitions. [2022-02-16 13:50:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:50:14,237 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:14,238 INFO L225 Difference]: With dead ends: 1235 [2022-02-16 13:50:14,238 INFO L226 Difference]: Without dead ends: 1229 [2022-02-16 13:50:14,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:50:14,239 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:14,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 130 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 647 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-02-16 13:50:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-02-16 13:50:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1164. [2022-02-16 13:50:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 2.9587274290627685) internal successors, (3441), 1163 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3441 transitions. [2022-02-16 13:50:14,251 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3441 transitions. Word has length 17 [2022-02-16 13:50:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:14,251 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 3441 transitions. [2022-02-16 13:50:14,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3441 transitions. [2022-02-16 13:50:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:14,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:14,252 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:14,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:14,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2022-02-16 13:50:14,468 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:14,468 INFO L85 PathProgramCache]: Analyzing trace with hash 880436117, now seen corresponding path program 318 times [2022-02-16 13:50:14,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:14,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363845770] [2022-02-16 13:50:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:14,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:14,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:14,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363845770] [2022-02-16 13:50:14,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363845770] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:14,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865868416] [2022-02-16 13:50:14,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:14,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:14,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:14,567 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:14,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-02-16 13:50:14,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:50:14,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:14,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:14,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:14,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:14,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:14,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:14,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:14,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:14,934 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:14,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:14,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:14,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865868416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:14,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:14,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:50:14,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352399553] [2022-02-16 13:50:14,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:14,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:14,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:14,955 INFO L87 Difference]: Start difference. First operand 1164 states and 3441 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:15,970 INFO L93 Difference]: Finished difference Result 1331 states and 3722 transitions. [2022-02-16 13:50:15,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:50:15,970 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:15,972 INFO L225 Difference]: With dead ends: 1331 [2022-02-16 13:50:15,972 INFO L226 Difference]: Without dead ends: 1331 [2022-02-16 13:50:15,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 13:50:15,973 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:15,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 94 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 740 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-02-16 13:50:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-02-16 13:50:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1157. [2022-02-16 13:50:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.9602076124567476) internal successors, (3422), 1156 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3422 transitions. [2022-02-16 13:50:15,986 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3422 transitions. Word has length 17 [2022-02-16 13:50:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:15,986 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 3422 transitions. [2022-02-16 13:50:15,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3422 transitions. [2022-02-16 13:50:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:15,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:15,987 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:16,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:16,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:16,187 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash -39264591, now seen corresponding path program 319 times [2022-02-16 13:50:16,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:16,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835714032] [2022-02-16 13:50:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:16,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:16,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:16,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835714032] [2022-02-16 13:50:16,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835714032] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:16,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27970442] [2022-02-16 13:50:16,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:16,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:16,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:16,297 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:16,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-02-16 13:50:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:16,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:16,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:16,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:16,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:16,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:16,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:16,608 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:16,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:16,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:16,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27970442] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:16,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:16,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:50:16,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632042870] [2022-02-16 13:50:16,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:16,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:16,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:16,631 INFO L87 Difference]: Start difference. First operand 1157 states and 3422 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:16,911 INFO L93 Difference]: Finished difference Result 1188 states and 3476 transitions. [2022-02-16 13:50:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:50:16,911 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:16,913 INFO L225 Difference]: With dead ends: 1188 [2022-02-16 13:50:16,913 INFO L226 Difference]: Without dead ends: 1183 [2022-02-16 13:50:16,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:50:16,913 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:16,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 460 Invalid, 0 Unknown, 2 Unchecked, 0.2s Time] [2022-02-16 13:50:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-02-16 13:50:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1158. [2022-02-16 13:50:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 2.9567847882454625) internal successors, (3421), 1157 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3421 transitions. [2022-02-16 13:50:16,925 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3421 transitions. Word has length 17 [2022-02-16 13:50:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:16,925 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 3421 transitions. [2022-02-16 13:50:16,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3421 transitions. [2022-02-16 13:50:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:16,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:16,927 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:16,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:17,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-02-16 13:50:17,143 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash 888166515, now seen corresponding path program 320 times [2022-02-16 13:50:17,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:17,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766117463] [2022-02-16 13:50:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:17,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:17,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:17,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766117463] [2022-02-16 13:50:17,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766117463] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:17,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505375795] [2022-02-16 13:50:17,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:17,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:17,288 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:17,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-02-16 13:50:17,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:17,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:17,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:17,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:17,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:17,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:17,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:17,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:17,588 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:17,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:17,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:17,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505375795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:17,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:17,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:50:17,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560213257] [2022-02-16 13:50:17,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:17,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:17,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:17,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:17,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:17,606 INFO L87 Difference]: Start difference. First operand 1158 states and 3421 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:18,594 INFO L93 Difference]: Finished difference Result 1377 states and 3765 transitions. [2022-02-16 13:50:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:50:18,594 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:18,596 INFO L225 Difference]: With dead ends: 1377 [2022-02-16 13:50:18,596 INFO L226 Difference]: Without dead ends: 1377 [2022-02-16 13:50:18,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=324, Invalid=2028, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:50:18,597 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 174 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:18,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 108 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:50:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-02-16 13:50:18,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1143. [2022-02-16 13:50:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.9527145359019262) internal successors, (3372), 1142 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 3372 transitions. [2022-02-16 13:50:18,609 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 3372 transitions. Word has length 17 [2022-02-16 13:50:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:18,610 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 3372 transitions. [2022-02-16 13:50:18,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 3372 transitions. [2022-02-16 13:50:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:18,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:18,611 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:18,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:18,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-02-16 13:50:18,827 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1689782743, now seen corresponding path program 321 times [2022-02-16 13:50:18,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:18,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407517993] [2022-02-16 13:50:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:18,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:18,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:18,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407517993] [2022-02-16 13:50:18,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407517993] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:18,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791110190] [2022-02-16 13:50:18,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:18,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:18,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:18,901 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:18,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-02-16 13:50:18,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:50:18,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:19,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:19,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:19,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:19,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:19,156 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:19,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:19,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:19,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791110190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:19,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:19,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:50:19,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123288693] [2022-02-16 13:50:19,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:19,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:19,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:19,173 INFO L87 Difference]: Start difference. First operand 1143 states and 3372 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:19,557 INFO L93 Difference]: Finished difference Result 1239 states and 3531 transitions. [2022-02-16 13:50:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:50:19,558 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:19,559 INFO L225 Difference]: With dead ends: 1239 [2022-02-16 13:50:19,559 INFO L226 Difference]: Without dead ends: 1236 [2022-02-16 13:50:19,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:50:19,560 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 105 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:19,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 114 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:19,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-02-16 13:50:19,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1155. [2022-02-16 13:50:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.9575389948006934) internal successors, (3413), 1154 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 3413 transitions. [2022-02-16 13:50:19,572 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 3413 transitions. Word has length 17 [2022-02-16 13:50:19,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:19,573 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 3413 transitions. [2022-02-16 13:50:19,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 3413 transitions. [2022-02-16 13:50:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:19,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:19,574 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:19,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:19,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-02-16 13:50:19,786 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:19,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash -886840847, now seen corresponding path program 322 times [2022-02-16 13:50:19,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:19,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069185888] [2022-02-16 13:50:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:19,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:19,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:19,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069185888] [2022-02-16 13:50:19,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069185888] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:19,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567426194] [2022-02-16 13:50:19,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:19,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:19,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:19,910 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:19,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-02-16 13:50:19,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:19,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:19,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:19,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:20,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:20,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:20,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:20,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:20,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:20,279 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:20,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:20,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:20,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567426194] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:20,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:20,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:50:20,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286540687] [2022-02-16 13:50:20,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:20,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:20,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:20,306 INFO L87 Difference]: Start difference. First operand 1155 states and 3413 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:20,677 INFO L93 Difference]: Finished difference Result 1236 states and 3524 transitions. [2022-02-16 13:50:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:50:20,677 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:20,679 INFO L225 Difference]: With dead ends: 1236 [2022-02-16 13:50:20,679 INFO L226 Difference]: Without dead ends: 1236 [2022-02-16 13:50:20,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:50:20,679 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 91 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:20,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 142 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:20,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-02-16 13:50:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1149. [2022-02-16 13:50:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 2.9538327526132404) internal successors, (3391), 1148 states have internal predecessors, (3391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3391 transitions. [2022-02-16 13:50:20,692 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3391 transitions. Word has length 17 [2022-02-16 13:50:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:20,692 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 3391 transitions. [2022-02-16 13:50:20,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3391 transitions. [2022-02-16 13:50:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:20,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:20,693 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:20,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:20,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:20,909 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash -10398669, now seen corresponding path program 323 times [2022-02-16 13:50:20,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:20,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267094537] [2022-02-16 13:50:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:20,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:20,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:20,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267094537] [2022-02-16 13:50:20,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267094537] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:20,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814594557] [2022-02-16 13:50:20,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:21,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:21,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:21,001 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:21,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-02-16 13:50:21,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:50:21,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:21,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:21,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:21,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:21,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:21,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:21,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:21,309 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:21,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:21,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:21,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814594557] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:21,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:21,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:50:21,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681740879] [2022-02-16 13:50:21,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:21,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:21,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:21,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:21,333 INFO L87 Difference]: Start difference. First operand 1149 states and 3391 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:21,614 INFO L93 Difference]: Finished difference Result 1291 states and 3693 transitions. [2022-02-16 13:50:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:50:21,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:21,616 INFO L225 Difference]: With dead ends: 1291 [2022-02-16 13:50:21,616 INFO L226 Difference]: Without dead ends: 1291 [2022-02-16 13:50:21,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:21,616 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:21,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 122 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 626 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-02-16 13:50:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-02-16 13:50:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1170. [2022-02-16 13:50:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.956372968349016) internal successors, (3456), 1169 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3456 transitions. [2022-02-16 13:50:21,629 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3456 transitions. Word has length 17 [2022-02-16 13:50:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:21,629 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 3456 transitions. [2022-02-16 13:50:21,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3456 transitions. [2022-02-16 13:50:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:21,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:21,630 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:21,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:21,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-02-16 13:50:21,846 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:21,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1543650455, now seen corresponding path program 324 times [2022-02-16 13:50:21,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:21,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704905863] [2022-02-16 13:50:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:21,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:21,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:21,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704905863] [2022-02-16 13:50:21,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704905863] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:21,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474410987] [2022-02-16 13:50:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:21,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:21,933 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:21,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-02-16 13:50:21,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:50:21,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:21,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:21,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:22,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:22,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:22,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:22,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:22,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:22,256 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:22,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:22,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:22,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474410987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:22,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:22,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:50:22,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77692209] [2022-02-16 13:50:22,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:22,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:22,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:22,286 INFO L87 Difference]: Start difference. First operand 1170 states and 3456 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:22,649 INFO L93 Difference]: Finished difference Result 1219 states and 3527 transitions. [2022-02-16 13:50:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:50:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:22,651 INFO L225 Difference]: With dead ends: 1219 [2022-02-16 13:50:22,651 INFO L226 Difference]: Without dead ends: 1213 [2022-02-16 13:50:22,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:50:22,651 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:22,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 70 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 560 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-02-16 13:50:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-02-16 13:50:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1170. [2022-02-16 13:50:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.9538066723695464) internal successors, (3453), 1169 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3453 transitions. [2022-02-16 13:50:22,664 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3453 transitions. Word has length 17 [2022-02-16 13:50:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:22,664 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 3453 transitions. [2022-02-16 13:50:22,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3453 transitions. [2022-02-16 13:50:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:22,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:22,666 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:22,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:22,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-02-16 13:50:22,875 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash 229243669, now seen corresponding path program 325 times [2022-02-16 13:50:22,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:22,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299938615] [2022-02-16 13:50:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:22,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:22,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:22,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299938615] [2022-02-16 13:50:22,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299938615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:22,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308489934] [2022-02-16 13:50:22,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:22,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:22,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:22,959 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:22,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-02-16 13:50:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:22,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:22,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:23,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:23,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:23,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:23,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:23,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:23,180 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:23,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:23,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:23,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308489934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:23,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:23,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:50:23,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141385724] [2022-02-16 13:50:23,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:23,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:23,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:23,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:23,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:23,195 INFO L87 Difference]: Start difference. First operand 1170 states and 3453 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:23,649 INFO L93 Difference]: Finished difference Result 1331 states and 3773 transitions. [2022-02-16 13:50:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:50:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:23,651 INFO L225 Difference]: With dead ends: 1331 [2022-02-16 13:50:23,651 INFO L226 Difference]: Without dead ends: 1329 [2022-02-16 13:50:23,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:50:23,651 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:23,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 74 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 673 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-02-16 13:50:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2022-02-16 13:50:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1176. [2022-02-16 13:50:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.953191489361702) internal successors, (3470), 1175 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3470 transitions. [2022-02-16 13:50:23,665 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3470 transitions. Word has length 17 [2022-02-16 13:50:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:23,665 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 3470 transitions. [2022-02-16 13:50:23,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3470 transitions. [2022-02-16 13:50:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:23,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:23,666 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:23,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:23,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-02-16 13:50:23,882 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:23,882 INFO L85 PathProgramCache]: Analyzing trace with hash -690457039, now seen corresponding path program 326 times [2022-02-16 13:50:23,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:23,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029015490] [2022-02-16 13:50:23,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:23,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:23,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:23,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029015490] [2022-02-16 13:50:23,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029015490] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:23,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772717483] [2022-02-16 13:50:23,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:23,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:23,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:23,945 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:23,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-02-16 13:50:23,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:23,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:23,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:23,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:24,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:24,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:24,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:24,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:24,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:24,173 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:24,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:24,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:24,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772717483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:24,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:24,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:50:24,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847283193] [2022-02-16 13:50:24,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:24,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:24,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:24,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:24,191 INFO L87 Difference]: Start difference. First operand 1176 states and 3470 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:24,527 INFO L93 Difference]: Finished difference Result 1218 states and 3538 transitions. [2022-02-16 13:50:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:50:24,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:24,529 INFO L225 Difference]: With dead ends: 1218 [2022-02-16 13:50:24,529 INFO L226 Difference]: Without dead ends: 1214 [2022-02-16 13:50:24,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:50:24,530 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:24,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 56 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 646 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-02-16 13:50:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-02-16 13:50:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1178. [2022-02-16 13:50:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 2.949872557349193) internal successors, (3472), 1177 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3472 transitions. [2022-02-16 13:50:24,542 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3472 transitions. Word has length 17 [2022-02-16 13:50:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:24,542 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 3472 transitions. [2022-02-16 13:50:24,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3472 transitions. [2022-02-16 13:50:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:24,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:24,544 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:24,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:24,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:24,759 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash 236974067, now seen corresponding path program 327 times [2022-02-16 13:50:24,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:24,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5995501] [2022-02-16 13:50:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:24,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:24,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:24,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5995501] [2022-02-16 13:50:24,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5995501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:24,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655373011] [2022-02-16 13:50:24,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:24,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:24,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:24,821 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:24,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-02-16 13:50:24,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:50:24,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:24,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-16 13:50:24,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:24,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:24,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:24,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:24,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:24,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:25,043 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:25,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:25,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:25,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655373011] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:25,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:25,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:50:25,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541429641] [2022-02-16 13:50:25,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:25,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:25,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:25,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:25,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:25,060 INFO L87 Difference]: Start difference. First operand 1178 states and 3472 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:25,677 INFO L93 Difference]: Finished difference Result 1376 states and 3863 transitions. [2022-02-16 13:50:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:50:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:25,679 INFO L225 Difference]: With dead ends: 1376 [2022-02-16 13:50:25,679 INFO L226 Difference]: Without dead ends: 1371 [2022-02-16 13:50:25,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 13:50:25,679 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 99 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:25,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 68 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-02-16 13:50:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1167. [2022-02-16 13:50:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.9451114922813035) internal successors, (3434), 1166 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3434 transitions. [2022-02-16 13:50:25,692 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3434 transitions. Word has length 17 [2022-02-16 13:50:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:25,692 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 3434 transitions. [2022-02-16 13:50:25,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3434 transitions. [2022-02-16 13:50:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:25,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:25,693 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:25,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:25,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:25,909 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:25,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1038590295, now seen corresponding path program 328 times [2022-02-16 13:50:25,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:25,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264717186] [2022-02-16 13:50:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:25,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:25,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:25,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264717186] [2022-02-16 13:50:25,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264717186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:25,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606388903] [2022-02-16 13:50:25,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:25,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:25,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:25,994 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:25,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-02-16 13:50:26,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:26,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:26,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:26,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:26,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:26,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:26,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:26,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:26,266 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:26,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:26,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:26,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606388903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:26,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:26,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:50:26,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795728190] [2022-02-16 13:50:26,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:26,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:26,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:26,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:26,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:26,290 INFO L87 Difference]: Start difference. First operand 1167 states and 3434 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:26,740 INFO L93 Difference]: Finished difference Result 1214 states and 3528 transitions. [2022-02-16 13:50:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:50:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:26,742 INFO L225 Difference]: With dead ends: 1214 [2022-02-16 13:50:26,742 INFO L226 Difference]: Without dead ends: 1210 [2022-02-16 13:50:26,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:50:26,742 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 43 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:26,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 30 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:26,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-02-16 13:50:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1168. [2022-02-16 13:50:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.9443016281062553) internal successors, (3436), 1167 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3436 transitions. [2022-02-16 13:50:26,755 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3436 transitions. Word has length 17 [2022-02-16 13:50:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:26,755 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 3436 transitions. [2022-02-16 13:50:26,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:26,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3436 transitions. [2022-02-16 13:50:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:26,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:26,756 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:26,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:26,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:26,972 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1538033295, now seen corresponding path program 329 times [2022-02-16 13:50:26,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:26,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340893482] [2022-02-16 13:50:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:26,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:27,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:27,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340893482] [2022-02-16 13:50:27,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340893482] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:27,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105669690] [2022-02-16 13:50:27,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:27,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:27,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:27,059 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:27,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-02-16 13:50:27,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:50:27,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:27,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:27,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:27,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:27,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:27,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:27,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:27,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:27,292 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:27,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:27,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:27,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105669690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:27,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:27,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:50:27,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382592896] [2022-02-16 13:50:27,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:27,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:27,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:27,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:27,310 INFO L87 Difference]: Start difference. First operand 1168 states and 3436 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:27,556 INFO L93 Difference]: Finished difference Result 1208 states and 3517 transitions. [2022-02-16 13:50:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:50:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:27,558 INFO L225 Difference]: With dead ends: 1208 [2022-02-16 13:50:27,558 INFO L226 Difference]: Without dead ends: 1208 [2022-02-16 13:50:27,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:50:27,559 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:27,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-02-16 13:50:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1163. [2022-02-16 13:50:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 2.9414802065404473) internal successors, (3418), 1162 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3418 transitions. [2022-02-16 13:50:27,580 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3418 transitions. Word has length 17 [2022-02-16 13:50:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:27,580 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 3418 transitions. [2022-02-16 13:50:27,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3418 transitions. [2022-02-16 13:50:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:27,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:27,581 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:27,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:27,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-02-16 13:50:27,797 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash 208237461, now seen corresponding path program 330 times [2022-02-16 13:50:27,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:27,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79233669] [2022-02-16 13:50:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:27,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:27,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:27,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79233669] [2022-02-16 13:50:27,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79233669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:27,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849238943] [2022-02-16 13:50:27,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:27,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:27,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:27,856 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:27,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-02-16 13:50:27,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:50:27,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:27,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:27,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:27,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:27,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:27,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:27,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:27,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:28,048 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:28,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:50:28,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:50:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:28,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849238943] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:28,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:28,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:50:28,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192196321] [2022-02-16 13:50:28,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:28,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:28,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:28,066 INFO L87 Difference]: Start difference. First operand 1163 states and 3418 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:28,295 INFO L93 Difference]: Finished difference Result 1287 states and 3668 transitions. [2022-02-16 13:50:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:50:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:28,297 INFO L225 Difference]: With dead ends: 1287 [2022-02-16 13:50:28,297 INFO L226 Difference]: Without dead ends: 1287 [2022-02-16 13:50:28,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:50:28,297 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:28,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 641 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-02-16 13:50:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-02-16 13:50:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1171. [2022-02-16 13:50:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.9444444444444446) internal successors, (3445), 1170 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3445 transitions. [2022-02-16 13:50:28,310 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3445 transitions. Word has length 17 [2022-02-16 13:50:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:28,310 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 3445 transitions. [2022-02-16 13:50:28,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3445 transitions. [2022-02-16 13:50:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:28,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:28,312 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:28,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:28,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-02-16 13:50:28,528 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash -711463247, now seen corresponding path program 331 times [2022-02-16 13:50:28,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:28,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393182336] [2022-02-16 13:50:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:28,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:28,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:28,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393182336] [2022-02-16 13:50:28,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393182336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:28,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306778490] [2022-02-16 13:50:28,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:28,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:28,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:28,606 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:28,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-02-16 13:50:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:28,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:28,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:28,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:28,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:28,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:28,885 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:28,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:50:28,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:28,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306778490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:28,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:28,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:50:28,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53286027] [2022-02-16 13:50:28,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:28,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:28,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:28,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:28,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:28,918 INFO L87 Difference]: Start difference. First operand 1171 states and 3445 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:29,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:29,325 INFO L93 Difference]: Finished difference Result 1221 states and 3520 transitions. [2022-02-16 13:50:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:50:29,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:29,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:29,327 INFO L225 Difference]: With dead ends: 1221 [2022-02-16 13:50:29,327 INFO L226 Difference]: Without dead ends: 1217 [2022-02-16 13:50:29,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:50:29,327 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:29,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 72 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 548 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-02-16 13:50:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-02-16 13:50:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1171. [2022-02-16 13:50:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.935042735042735) internal successors, (3434), 1170 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3434 transitions. [2022-02-16 13:50:29,339 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3434 transitions. Word has length 17 [2022-02-16 13:50:29,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:29,340 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 3434 transitions. [2022-02-16 13:50:29,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:29,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3434 transitions. [2022-02-16 13:50:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:29,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:29,341 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:29,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:29,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-02-16 13:50:29,549 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:29,549 INFO L85 PathProgramCache]: Analyzing trace with hash 215967859, now seen corresponding path program 332 times [2022-02-16 13:50:29,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:29,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401229993] [2022-02-16 13:50:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:29,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:29,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:29,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401229993] [2022-02-16 13:50:29,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401229993] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:29,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488999823] [2022-02-16 13:50:29,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:29,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:29,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:29,625 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:29,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-02-16 13:50:29,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:29,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:29,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:29,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:29,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:29,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:29,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:29,857 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:29,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:50:29,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:50:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:29,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488999823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:29,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:29,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:50:29,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281049096] [2022-02-16 13:50:29,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:29,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:29,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:29,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:29,879 INFO L87 Difference]: Start difference. First operand 1171 states and 3434 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:30,278 INFO L93 Difference]: Finished difference Result 1309 states and 3660 transitions. [2022-02-16 13:50:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:50:30,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:30,280 INFO L225 Difference]: With dead ends: 1309 [2022-02-16 13:50:30,280 INFO L226 Difference]: Without dead ends: 1307 [2022-02-16 13:50:30,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:50:30,280 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:30,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 70 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-02-16 13:50:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1169. [2022-02-16 13:50:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 2.9220890410958904) internal successors, (3413), 1168 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3413 transitions. [2022-02-16 13:50:30,293 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3413 transitions. Word has length 17 [2022-02-16 13:50:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:30,293 INFO L470 AbstractCegarLoop]: Abstraction has 1169 states and 3413 transitions. [2022-02-16 13:50:30,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3413 transitions. [2022-02-16 13:50:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:30,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:30,295 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:30,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:30,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-02-16 13:50:30,509 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1017584087, now seen corresponding path program 333 times [2022-02-16 13:50:30,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:30,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522940571] [2022-02-16 13:50:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:30,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:30,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:30,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522940571] [2022-02-16 13:50:30,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522940571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:30,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600315000] [2022-02-16 13:50:30,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:30,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:30,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:30,606 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:30,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-02-16 13:50:30,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:50:30,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-16 13:50:30,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:30,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:30,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:30,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:30,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:30,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:30,882 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:30,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:50:30,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:30,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600315000] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:30,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:30,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:50:30,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707112855] [2022-02-16 13:50:30,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:30,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:30,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:30,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:30,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:30,916 INFO L87 Difference]: Start difference. First operand 1169 states and 3413 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:31,494 INFO L93 Difference]: Finished difference Result 1270 states and 3581 transitions. [2022-02-16 13:50:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 13:50:31,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:31,496 INFO L225 Difference]: With dead ends: 1270 [2022-02-16 13:50:31,496 INFO L226 Difference]: Without dead ends: 1267 [2022-02-16 13:50:31,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:50:31,496 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 97 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:31,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 72 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-02-16 13:50:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1178. [2022-02-16 13:50:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 2.9124893797790996) internal successors, (3428), 1177 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3428 transitions. [2022-02-16 13:50:31,509 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3428 transitions. Word has length 17 [2022-02-16 13:50:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:31,509 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 3428 transitions. [2022-02-16 13:50:31,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3428 transitions. [2022-02-16 13:50:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:31,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:31,510 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:31,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:31,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2022-02-16 13:50:31,723 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1559039503, now seen corresponding path program 334 times [2022-02-16 13:50:31,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:31,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270618990] [2022-02-16 13:50:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:31,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:31,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:31,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270618990] [2022-02-16 13:50:31,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270618990] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:31,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638385535] [2022-02-16 13:50:31,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:31,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:31,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:31,793 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:31,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-02-16 13:50:31,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:31,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:31,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:31,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:31,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:31,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:31,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:31,977 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:31,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:50:31,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:31,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638385535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:31,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:31,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:50:31,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258101533] [2022-02-16 13:50:31,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:31,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:31,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:31,997 INFO L87 Difference]: Start difference. First operand 1178 states and 3428 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:32,280 INFO L93 Difference]: Finished difference Result 1257 states and 3543 transitions. [2022-02-16 13:50:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:50:32,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:32,282 INFO L225 Difference]: With dead ends: 1257 [2022-02-16 13:50:32,282 INFO L226 Difference]: Without dead ends: 1257 [2022-02-16 13:50:32,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:50:32,282 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:32,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 68 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-02-16 13:50:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1150. [2022-02-16 13:50:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 2.8912097476066143) internal successors, (3322), 1149 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3322 transitions. [2022-02-16 13:50:32,294 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3322 transitions. Word has length 17 [2022-02-16 13:50:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:32,294 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 3322 transitions. [2022-02-16 13:50:32,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3322 transitions. [2022-02-16 13:50:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:32,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:32,295 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:32,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:32,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:32,503 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:32,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:32,503 INFO L85 PathProgramCache]: Analyzing trace with hash 334084049, now seen corresponding path program 335 times [2022-02-16 13:50:32,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:32,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926472040] [2022-02-16 13:50:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:32,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:50:32,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:32,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926472040] [2022-02-16 13:50:32,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926472040] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:32,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392977479] [2022-02-16 13:50:32,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:32,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:32,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:32,613 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:32,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-02-16 13:50:32,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:50:32,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:32,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:32,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:32,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:32,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:32,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:32,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:32,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:32,830 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:32,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:50:32,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:50:32,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392977479] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:32,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:32,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:50:32,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068809395] [2022-02-16 13:50:32,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:32,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:32,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:32,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:32,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:32,849 INFO L87 Difference]: Start difference. First operand 1150 states and 3322 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:33,223 INFO L93 Difference]: Finished difference Result 1247 states and 3474 transitions. [2022-02-16 13:50:33,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:50:33,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:33,225 INFO L225 Difference]: With dead ends: 1247 [2022-02-16 13:50:33,225 INFO L226 Difference]: Without dead ends: 1245 [2022-02-16 13:50:33,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:50:33,225 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:33,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 78 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:33,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-02-16 13:50:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1151. [2022-02-16 13:50:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 2.8817391304347826) internal successors, (3314), 1150 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 3314 transitions. [2022-02-16 13:50:33,237 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 3314 transitions. Word has length 17 [2022-02-16 13:50:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:33,237 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 3314 transitions. [2022-02-16 13:50:33,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 3314 transitions. [2022-02-16 13:50:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:33,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:33,238 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:33,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:33,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:33,454 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2063131383, now seen corresponding path program 336 times [2022-02-16 13:50:33,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:33,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206106867] [2022-02-16 13:50:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:33,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:50:33,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:33,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206106867] [2022-02-16 13:50:33,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206106867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:33,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629391697] [2022-02-16 13:50:33,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:33,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:33,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:33,543 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:33,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-02-16 13:50:33,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:50:33,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:33,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:33,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:50:33,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:33,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:50:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:33,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:33,730 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:50:33,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:50:33,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:50:33,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629391697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:33,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:33,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-16 13:50:33,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545620622] [2022-02-16 13:50:33,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:33,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:33,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:33,751 INFO L87 Difference]: Start difference. First operand 1151 states and 3314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:34,084 INFO L93 Difference]: Finished difference Result 1203 states and 3394 transitions. [2022-02-16 13:50:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:50:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:34,086 INFO L225 Difference]: With dead ends: 1203 [2022-02-16 13:50:34,086 INFO L226 Difference]: Without dead ends: 1199 [2022-02-16 13:50:34,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:50:34,087 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:34,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 94 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:34,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-02-16 13:50:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1151. [2022-02-16 13:50:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 2.8721739130434782) internal successors, (3303), 1150 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 3303 transitions. [2022-02-16 13:50:34,099 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 3303 transitions. Word has length 17 [2022-02-16 13:50:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:34,099 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 3303 transitions. [2022-02-16 13:50:34,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 3303 transitions. [2022-02-16 13:50:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:34,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:34,100 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:34,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:34,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:34,314 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:34,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:34,314 INFO L85 PathProgramCache]: Analyzing trace with hash -200351757, now seen corresponding path program 337 times [2022-02-16 13:50:34,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:34,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651934090] [2022-02-16 13:50:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:34,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:34,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:34,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651934090] [2022-02-16 13:50:34,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651934090] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:34,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87261354] [2022-02-16 13:50:34,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:34,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:34,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:34,382 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:34,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-02-16 13:50:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:34,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:34,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:34,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:34,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:34,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:34,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:34,596 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:34,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:34,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:34,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87261354] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:34,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:34,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:50:34,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293554377] [2022-02-16 13:50:34,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:34,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:34,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:34,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:34,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:34,615 INFO L87 Difference]: Start difference. First operand 1151 states and 3303 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:35,073 INFO L93 Difference]: Finished difference Result 1346 states and 3680 transitions. [2022-02-16 13:50:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:50:35,074 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:35,075 INFO L225 Difference]: With dead ends: 1346 [2022-02-16 13:50:35,075 INFO L226 Difference]: Without dead ends: 1345 [2022-02-16 13:50:35,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:50:35,076 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:35,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 138 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:35,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-02-16 13:50:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1183. [2022-02-16 13:50:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.88917089678511) internal successors, (3415), 1182 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3415 transitions. [2022-02-16 13:50:35,088 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3415 transitions. Word has length 17 [2022-02-16 13:50:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:35,089 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 3415 transitions. [2022-02-16 13:50:35,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3415 transitions. [2022-02-16 13:50:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:35,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:35,090 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:35,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:35,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:35,306 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:35,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:35,306 INFO L85 PathProgramCache]: Analyzing trace with hash 601264471, now seen corresponding path program 338 times [2022-02-16 13:50:35,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:35,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829857186] [2022-02-16 13:50:35,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:35,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:35,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:35,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829857186] [2022-02-16 13:50:35,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829857186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:35,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408522857] [2022-02-16 13:50:35,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:35,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:35,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:35,406 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:35,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-02-16 13:50:35,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:35,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:35,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:35,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:35,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:35,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:35,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:35,691 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:35,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:35,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:35,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408522857] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:35,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:35,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:50:35,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940537471] [2022-02-16 13:50:35,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:35,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:35,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:35,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:35,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:35,711 INFO L87 Difference]: Start difference. First operand 1183 states and 3415 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:36,825 INFO L93 Difference]: Finished difference Result 1450 states and 3944 transitions. [2022-02-16 13:50:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-16 13:50:36,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:36,827 INFO L225 Difference]: With dead ends: 1450 [2022-02-16 13:50:36,827 INFO L226 Difference]: Without dead ends: 1443 [2022-02-16 13:50:36,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=522, Invalid=3900, Unknown=0, NotChecked=0, Total=4422 [2022-02-16 13:50:36,828 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 174 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:36,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 110 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:50:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-02-16 13:50:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1239. [2022-02-16 13:50:36,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 2.9103392568659125) internal successors, (3603), 1238 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3603 transitions. [2022-02-16 13:50:36,843 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3603 transitions. Word has length 17 [2022-02-16 13:50:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:36,843 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 3603 transitions. [2022-02-16 13:50:36,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3603 transitions. [2022-02-16 13:50:36,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:36,844 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:36,844 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:36,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:37,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:37,059 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:37,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1975359119, now seen corresponding path program 339 times [2022-02-16 13:50:37,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:37,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782729115] [2022-02-16 13:50:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:37,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:37,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:37,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782729115] [2022-02-16 13:50:37,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782729115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:37,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525691014] [2022-02-16 13:50:37,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:37,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:37,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:37,138 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:37,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-02-16 13:50:37,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:50:37,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:37,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:37,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:37,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:37,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:37,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:37,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:37,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:37,368 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:37,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:37,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:37,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525691014] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:37,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:37,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:50:37,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197779566] [2022-02-16 13:50:37,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:37,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:37,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:37,384 INFO L87 Difference]: Start difference. First operand 1239 states and 3603 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:38,261 INFO L93 Difference]: Finished difference Result 1436 states and 3895 transitions. [2022-02-16 13:50:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 13:50:38,261 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:38,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:38,263 INFO L225 Difference]: With dead ends: 1436 [2022-02-16 13:50:38,263 INFO L226 Difference]: Without dead ends: 1435 [2022-02-16 13:50:38,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=2032, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:50:38,264 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:38,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 152 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:50:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-02-16 13:50:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1206. [2022-02-16 13:50:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 2.8863070539419087) internal successors, (3478), 1205 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 3478 transitions. [2022-02-16 13:50:38,277 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 3478 transitions. Word has length 17 [2022-02-16 13:50:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:38,277 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 3478 transitions. [2022-02-16 13:50:38,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 3478 transitions. [2022-02-16 13:50:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:38,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:38,279 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:38,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:38,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:38,494 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:38,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash 608994869, now seen corresponding path program 340 times [2022-02-16 13:50:38,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:38,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353748957] [2022-02-16 13:50:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:38,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:38,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:38,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353748957] [2022-02-16 13:50:38,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353748957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:38,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085785222] [2022-02-16 13:50:38,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:38,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:38,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:38,561 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:38,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-02-16 13:50:38,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:38,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:38,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:38,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:38,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:38,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:38,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:50:38,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:38,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:50:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:38,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:38,775 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:38,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:38,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:38,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085785222] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:38,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:38,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:50:38,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152238964] [2022-02-16 13:50:38,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:38,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:38,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:38,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:38,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:38,791 INFO L87 Difference]: Start difference. First operand 1206 states and 3478 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:39,488 INFO L93 Difference]: Finished difference Result 1362 states and 3732 transitions. [2022-02-16 13:50:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:50:39,488 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:39,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:39,490 INFO L225 Difference]: With dead ends: 1362 [2022-02-16 13:50:39,490 INFO L226 Difference]: Without dead ends: 1362 [2022-02-16 13:50:39,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 13:50:39,490 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:39,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 138 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:39,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2022-02-16 13:50:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1176. [2022-02-16 13:50:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.8817021276595747) internal successors, (3386), 1175 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3386 transitions. [2022-02-16 13:50:39,503 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3386 transitions. Word has length 17 [2022-02-16 13:50:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:39,504 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 3386 transitions. [2022-02-16 13:50:39,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3386 transitions. [2022-02-16 13:50:39,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:39,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:39,505 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:39,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:39,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:39,721 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:39,721 INFO L85 PathProgramCache]: Analyzing trace with hash -880410127, now seen corresponding path program 341 times [2022-02-16 13:50:39,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:39,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619390286] [2022-02-16 13:50:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:39,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:39,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:39,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619390286] [2022-02-16 13:50:39,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619390286] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:39,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122823896] [2022-02-16 13:50:39,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:39,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:39,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:39,784 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:39,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-02-16 13:50:39,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:50:39,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:39,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:39,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:39,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:50:39,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:39,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:50:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:39,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:39,982 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:39,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:39,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:39,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122823896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:39,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:39,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-16 13:50:39,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7350095] [2022-02-16 13:50:39,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:39,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:39,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:39,998 INFO L87 Difference]: Start difference. First operand 1176 states and 3386 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:40,303 INFO L93 Difference]: Finished difference Result 1293 states and 3580 transitions. [2022-02-16 13:50:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:50:40,303 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:40,305 INFO L225 Difference]: With dead ends: 1293 [2022-02-16 13:50:40,305 INFO L226 Difference]: Without dead ends: 1293 [2022-02-16 13:50:40,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:50:40,305 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:40,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 158 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-02-16 13:50:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1166. [2022-02-16 13:50:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 2.8763948497854077) internal successors, (3351), 1165 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 3351 transitions. [2022-02-16 13:50:40,317 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 3351 transitions. Word has length 17 [2022-02-16 13:50:40,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:40,318 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 3351 transitions. [2022-02-16 13:50:40,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 3351 transitions. [2022-02-16 13:50:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:40,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:40,319 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:40,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:40,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-02-16 13:50:40,533 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:40,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1644528931, now seen corresponding path program 342 times [2022-02-16 13:50:40,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:40,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530144681] [2022-02-16 13:50:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:40,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:40,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:40,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530144681] [2022-02-16 13:50:40,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530144681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:40,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244290515] [2022-02-16 13:50:40,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:40,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:40,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:40,645 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:40,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-02-16 13:50:40,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:50:40,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:40,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:40,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:40,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:40,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:40,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:40,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:40,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:40,873 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:40,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:40,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:40,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244290515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:40,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:40,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:50:40,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533998328] [2022-02-16 13:50:40,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:40,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:40,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:40,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:40,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:40,887 INFO L87 Difference]: Start difference. First operand 1166 states and 3351 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:41,063 INFO L93 Difference]: Finished difference Result 1342 states and 3741 transitions. [2022-02-16 13:50:41,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:50:41,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:41,066 INFO L225 Difference]: With dead ends: 1342 [2022-02-16 13:50:41,066 INFO L226 Difference]: Without dead ends: 1342 [2022-02-16 13:50:41,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:41,066 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:41,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 188 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 519 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-02-16 13:50:41,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-02-16 13:50:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1248. [2022-02-16 13:50:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.903769045709703) internal successors, (3621), 1247 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3621 transitions. [2022-02-16 13:50:41,080 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3621 transitions. Word has length 17 [2022-02-16 13:50:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:41,080 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3621 transitions. [2022-02-16 13:50:41,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3621 transitions. [2022-02-16 13:50:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:41,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:41,082 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:41,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:41,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-02-16 13:50:41,301 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:41,301 INFO L85 PathProgramCache]: Analyzing trace with hash 416330871, now seen corresponding path program 343 times [2022-02-16 13:50:41,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:41,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792518073] [2022-02-16 13:50:41,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:41,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:41,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:41,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792518073] [2022-02-16 13:50:41,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792518073] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:41,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693600083] [2022-02-16 13:50:41,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:41,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:41,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:41,395 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:41,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-02-16 13:50:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:41,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:41,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:41,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:41,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:41,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:41,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:41,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:41,628 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:41,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:41,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:41,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693600083] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:41,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:41,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:50:41,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966204635] [2022-02-16 13:50:41,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:41,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:41,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:41,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:41,642 INFO L87 Difference]: Start difference. First operand 1248 states and 3621 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:41,832 INFO L93 Difference]: Finished difference Result 1351 states and 3771 transitions. [2022-02-16 13:50:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:50:41,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:41,834 INFO L225 Difference]: With dead ends: 1351 [2022-02-16 13:50:41,834 INFO L226 Difference]: Without dead ends: 1351 [2022-02-16 13:50:41,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:41,834 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:41,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 204 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 581 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-02-16 13:50:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-02-16 13:50:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1248. [2022-02-16 13:50:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.903769045709703) internal successors, (3621), 1247 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3621 transitions. [2022-02-16 13:50:41,847 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3621 transitions. Word has length 17 [2022-02-16 13:50:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:41,847 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3621 transitions. [2022-02-16 13:50:41,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3621 transitions. [2022-02-16 13:50:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:41,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:41,849 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:41,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:42,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-02-16 13:50:42,064 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:42,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:42,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2145378205, now seen corresponding path program 344 times [2022-02-16 13:50:42,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:42,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734664835] [2022-02-16 13:50:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:42,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:42,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:42,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734664835] [2022-02-16 13:50:42,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734664835] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:42,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797481712] [2022-02-16 13:50:42,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:42,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:42,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:42,155 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:42,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-02-16 13:50:42,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:42,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:42,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:42,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:42,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:42,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:42,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:42,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:42,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:42,425 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:42,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:42,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:42,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797481712] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:42,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:42,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:50:42,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908589696] [2022-02-16 13:50:42,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:42,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:42,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:42,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:42,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:42,438 INFO L87 Difference]: Start difference. First operand 1248 states and 3621 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:42,604 INFO L93 Difference]: Finished difference Result 1341 states and 3742 transitions. [2022-02-16 13:50:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:50:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:42,606 INFO L225 Difference]: With dead ends: 1341 [2022-02-16 13:50:42,606 INFO L226 Difference]: Without dead ends: 1341 [2022-02-16 13:50:42,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:42,607 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:42,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 188 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 538 Invalid, 0 Unknown, 181 Unchecked, 0.1s Time] [2022-02-16 13:50:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-02-16 13:50:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1248. [2022-02-16 13:50:42,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.903769045709703) internal successors, (3621), 1247 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3621 transitions. [2022-02-16 13:50:42,620 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3621 transitions. Word has length 17 [2022-02-16 13:50:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:42,620 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3621 transitions. [2022-02-16 13:50:42,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3621 transitions. [2022-02-16 13:50:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:42,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:42,621 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:42,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:42,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:42,828 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash -713646343, now seen corresponding path program 345 times [2022-02-16 13:50:42,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:42,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841671535] [2022-02-16 13:50:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:42,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:42,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:42,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841671535] [2022-02-16 13:50:42,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841671535] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:42,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202301598] [2022-02-16 13:50:42,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:42,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:42,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:42,930 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:42,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-02-16 13:50:42,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:50:42,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:42,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:42,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:43,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:43,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:43,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:43,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:43,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:43,313 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:43,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:43,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:43,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202301598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:43,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:43,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:50:43,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111901022] [2022-02-16 13:50:43,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:43,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:43,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:43,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:43,340 INFO L87 Difference]: Start difference. First operand 1248 states and 3621 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:43,712 INFO L93 Difference]: Finished difference Result 1323 states and 3708 transitions. [2022-02-16 13:50:43,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:50:43,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:43,714 INFO L225 Difference]: With dead ends: 1323 [2022-02-16 13:50:43,714 INFO L226 Difference]: Without dead ends: 1315 [2022-02-16 13:50:43,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:50:43,714 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:43,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 152 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 499 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-02-16 13:50:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-02-16 13:50:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1254. [2022-02-16 13:50:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 2.8930566640063846) internal successors, (3625), 1253 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 3625 transitions. [2022-02-16 13:50:43,729 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 3625 transitions. Word has length 17 [2022-02-16 13:50:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:43,729 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 3625 transitions. [2022-02-16 13:50:43,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:43,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 3625 transitions. [2022-02-16 13:50:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:43,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:43,730 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:43,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-02-16 13:50:43,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:43,946 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1489416251, now seen corresponding path program 346 times [2022-02-16 13:50:43,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:43,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343045780] [2022-02-16 13:50:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:43,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:44,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:44,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343045780] [2022-02-16 13:50:44,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343045780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:44,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172171418] [2022-02-16 13:50:44,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:44,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:44,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:44,038 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:44,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-02-16 13:50:44,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:44,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:44,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:44,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:44,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:44,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:44,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:44,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:44,370 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:44,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:44,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:44,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172171418] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:44,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:44,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:50:44,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107729763] [2022-02-16 13:50:44,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:44,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:44,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:44,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:44,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:44,391 INFO L87 Difference]: Start difference. First operand 1254 states and 3625 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:45,004 INFO L93 Difference]: Finished difference Result 1423 states and 3907 transitions. [2022-02-16 13:50:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:50:45,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:45,006 INFO L225 Difference]: With dead ends: 1423 [2022-02-16 13:50:45,006 INFO L226 Difference]: Without dead ends: 1423 [2022-02-16 13:50:45,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:50:45,006 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:45,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 164 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 537 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-02-16 13:50:45,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-02-16 13:50:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1271. [2022-02-16 13:50:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1270 states have (on average 2.9062992125984253) internal successors, (3691), 1270 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 3691 transitions. [2022-02-16 13:50:45,021 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 3691 transitions. Word has length 17 [2022-02-16 13:50:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:45,021 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 3691 transitions. [2022-02-16 13:50:45,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 3691 transitions. [2022-02-16 13:50:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:45,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:45,022 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:45,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:45,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:45,232 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:45,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1076503711, now seen corresponding path program 347 times [2022-02-16 13:50:45,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:45,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669357599] [2022-02-16 13:50:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:45,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:45,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:45,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669357599] [2022-02-16 13:50:45,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669357599] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:45,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392123078] [2022-02-16 13:50:45,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:45,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:45,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:45,342 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:45,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-02-16 13:50:45,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:50:45,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:45,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:45,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:45,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:45,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:45,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:45,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:45,656 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:45,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:45,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:45,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392123078] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:45,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:45,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:50:45,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370813333] [2022-02-16 13:50:45,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:45,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:45,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:45,674 INFO L87 Difference]: Start difference. First operand 1271 states and 3691 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:46,300 INFO L93 Difference]: Finished difference Result 1398 states and 3863 transitions. [2022-02-16 13:50:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:50:46,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:46,302 INFO L225 Difference]: With dead ends: 1398 [2022-02-16 13:50:46,302 INFO L226 Difference]: Without dead ends: 1398 [2022-02-16 13:50:46,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 13:50:46,303 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:46,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 194 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 663 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-02-16 13:50:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2022-02-16 13:50:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1255. [2022-02-16 13:50:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 2.905901116427432) internal successors, (3644), 1254 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 3644 transitions. [2022-02-16 13:50:46,317 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 3644 transitions. Word has length 17 [2022-02-16 13:50:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:46,317 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 3644 transitions. [2022-02-16 13:50:46,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 3644 transitions. [2022-02-16 13:50:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:46,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:46,318 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:46,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Ended with exit code 0 [2022-02-16 13:50:46,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:46,534 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:46,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1251501921, now seen corresponding path program 348 times [2022-02-16 13:50:46,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:46,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512826033] [2022-02-16 13:50:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:46,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:46,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:46,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512826033] [2022-02-16 13:50:46,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512826033] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:46,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706548155] [2022-02-16 13:50:46,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:46,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:46,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:46,640 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:46,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-02-16 13:50:46,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:50:46,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:46,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:46,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:46,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:46,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:46,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:47,014 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:47,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:47,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:47,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706548155] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:47,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:47,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:50:47,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633770884] [2022-02-16 13:50:47,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:47,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:47,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:47,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:47,040 INFO L87 Difference]: Start difference. First operand 1255 states and 3644 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:47,617 INFO L93 Difference]: Finished difference Result 1339 states and 3744 transitions. [2022-02-16 13:50:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:50:47,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:47,619 INFO L225 Difference]: With dead ends: 1339 [2022-02-16 13:50:47,619 INFO L226 Difference]: Without dead ends: 1333 [2022-02-16 13:50:47,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:50:47,619 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:47,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 152 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 676 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-02-16 13:50:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-02-16 13:50:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1259. [2022-02-16 13:50:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 2.9022257551669317) internal successors, (3651), 1258 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 3651 transitions. [2022-02-16 13:50:47,633 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 3651 transitions. Word has length 17 [2022-02-16 13:50:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:47,633 INFO L470 AbstractCegarLoop]: Abstraction has 1259 states and 3651 transitions. [2022-02-16 13:50:47,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 3651 transitions. [2022-02-16 13:50:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:47,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:47,635 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:47,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:47,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:47,842 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1729058589, now seen corresponding path program 349 times [2022-02-16 13:50:47,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:47,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117827627] [2022-02-16 13:50:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:47,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:47,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:47,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117827627] [2022-02-16 13:50:47,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117827627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:47,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165752161] [2022-02-16 13:50:47,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:47,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:47,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:47,951 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:47,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-02-16 13:50:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:47,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:47,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:48,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:48,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:48,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:48,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:48,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:48,334 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:48,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:48,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:48,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165752161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:48,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:48,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:50:48,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910556418] [2022-02-16 13:50:48,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:48,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:48,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:48,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:48,355 INFO L87 Difference]: Start difference. First operand 1259 states and 3651 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:49,373 INFO L93 Difference]: Finished difference Result 1451 states and 3964 transitions. [2022-02-16 13:50:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:50:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:49,375 INFO L225 Difference]: With dead ends: 1451 [2022-02-16 13:50:49,375 INFO L226 Difference]: Without dead ends: 1449 [2022-02-16 13:50:49,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 13:50:49,376 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 90 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:49,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 116 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 655 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2022-02-16 13:50:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-02-16 13:50:49,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1245. [2022-02-16 13:50:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 2.9011254019292605) internal successors, (3609), 1244 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3609 transitions. [2022-02-16 13:50:49,390 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3609 transitions. Word has length 17 [2022-02-16 13:50:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:49,390 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 3609 transitions. [2022-02-16 13:50:49,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3609 transitions. [2022-02-16 13:50:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:49,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:49,391 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:49,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:49,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:49,595 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash 809357881, now seen corresponding path program 350 times [2022-02-16 13:50:49,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:49,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133724866] [2022-02-16 13:50:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:49,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:49,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:49,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133724866] [2022-02-16 13:50:49,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133724866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:49,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240741414] [2022-02-16 13:50:49,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:49,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:49,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:49,686 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:49,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-02-16 13:50:49,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:49,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:49,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:49,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:49,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:49,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:49,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:49,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:50,015 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:50,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:50,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:50,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240741414] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:50,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:50,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:50:50,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116909900] [2022-02-16 13:50:50,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:50,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:50,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:50,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:50,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:50,037 INFO L87 Difference]: Start difference. First operand 1245 states and 3609 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:50,541 INFO L93 Difference]: Finished difference Result 1304 states and 3675 transitions. [2022-02-16 13:50:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:50:50,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:50,543 INFO L225 Difference]: With dead ends: 1304 [2022-02-16 13:50:50,543 INFO L226 Difference]: Without dead ends: 1298 [2022-02-16 13:50:50,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:50:50,543 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:50,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 110 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 720 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-02-16 13:50:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-02-16 13:50:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1246. [2022-02-16 13:50:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 2.89718875502008) internal successors, (3607), 1245 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3607 transitions. [2022-02-16 13:50:50,556 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3607 transitions. Word has length 17 [2022-02-16 13:50:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:50,557 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 3607 transitions. [2022-02-16 13:50:50,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3607 transitions. [2022-02-16 13:50:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:50,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:50,558 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:50,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:50,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:50,761 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:50,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1736788987, now seen corresponding path program 351 times [2022-02-16 13:50:50,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:50,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071243006] [2022-02-16 13:50:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:50,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:50,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:50,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071243006] [2022-02-16 13:50:50,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071243006] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:50,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712277809] [2022-02-16 13:50:50,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:50,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:50,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:50,872 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:50,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-02-16 13:50:50,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:50:50,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-16 13:50:50,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:51,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:51,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:51,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:51,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:51,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:51,279 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:51,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:51,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:51,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712277809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:51,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:51,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:50:51,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976027485] [2022-02-16 13:50:51,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:51,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:51,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:51,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:51,301 INFO L87 Difference]: Start difference. First operand 1246 states and 3607 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:52,278 INFO L93 Difference]: Finished difference Result 1405 states and 3781 transitions. [2022-02-16 13:50:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:50:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:52,280 INFO L225 Difference]: With dead ends: 1405 [2022-02-16 13:50:52,280 INFO L226 Difference]: Without dead ends: 1403 [2022-02-16 13:50:52,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 13:50:52,280 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 192 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:52,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 128 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:50:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-02-16 13:50:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1199. [2022-02-16 13:50:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 2.8697829716193657) internal successors, (3438), 1198 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3438 transitions. [2022-02-16 13:50:52,294 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3438 transitions. Word has length 17 [2022-02-16 13:50:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:52,294 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 3438 transitions. [2022-02-16 13:50:52,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3438 transitions. [2022-02-16 13:50:52,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:52,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:52,296 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:52,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-02-16 13:50:52,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-02-16 13:50:52,512 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:52,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:52,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1756562081, now seen corresponding path program 352 times [2022-02-16 13:50:52,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:52,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138267573] [2022-02-16 13:50:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:52,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:52,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:52,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138267573] [2022-02-16 13:50:52,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138267573] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:52,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723984862] [2022-02-16 13:50:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:52,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:52,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:52,627 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:52,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-02-16 13:50:52,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:52,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:52,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:52,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:52,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:52,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:52,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:52,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:53,019 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:53,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:53,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:53,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723984862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:53,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:53,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:50:53,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517542174] [2022-02-16 13:50:53,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:53,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:53,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:53,046 INFO L87 Difference]: Start difference. First operand 1199 states and 3438 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:53,628 INFO L93 Difference]: Finished difference Result 1273 states and 3545 transitions. [2022-02-16 13:50:53,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:50:53,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:53,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:53,630 INFO L225 Difference]: With dead ends: 1273 [2022-02-16 13:50:53,630 INFO L226 Difference]: Without dead ends: 1269 [2022-02-16 13:50:53,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:50:53,630 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 107 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:53,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 108 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:50:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-02-16 13:50:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1205. [2022-02-16 13:50:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 2.867940199335548) internal successors, (3453), 1204 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 3453 transitions. [2022-02-16 13:50:53,642 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 3453 transitions. Word has length 17 [2022-02-16 13:50:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:53,643 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 3453 transitions. [2022-02-16 13:50:53,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 3453 transitions. [2022-02-16 13:50:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:53,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:53,644 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:53,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-02-16 13:50:53,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-02-16 13:50:53,851 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash -38218375, now seen corresponding path program 353 times [2022-02-16 13:50:53,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:53,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371844700] [2022-02-16 13:50:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:53,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:53,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:53,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371844700] [2022-02-16 13:50:53,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371844700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:53,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994465888] [2022-02-16 13:50:53,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:53,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:53,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:53,949 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:53,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-02-16 13:50:53,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:50:53,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:53,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:53,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:54,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:54,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:54,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:54,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:54,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:54,260 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:54,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:54,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:54,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994465888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:54,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:54,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:50:54,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250503115] [2022-02-16 13:50:54,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:54,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:54,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:54,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:54,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:54,281 INFO L87 Difference]: Start difference. First operand 1205 states and 3453 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:54,601 INFO L93 Difference]: Finished difference Result 1263 states and 3527 transitions. [2022-02-16 13:50:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:50:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:54,603 INFO L225 Difference]: With dead ends: 1263 [2022-02-16 13:50:54,603 INFO L226 Difference]: Without dead ends: 1263 [2022-02-16 13:50:54,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:50:54,604 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:54,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 118 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:54,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-02-16 13:50:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1186. [2022-02-16 13:50:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 2.869198312236287) internal successors, (3400), 1185 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 3400 transitions. [2022-02-16 13:50:54,617 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 3400 transitions. Word has length 17 [2022-02-16 13:50:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:54,617 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 3400 transitions. [2022-02-16 13:50:54,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:54,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 3400 transitions. [2022-02-16 13:50:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:54,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:54,618 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:54,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:54,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-02-16 13:50:54,834 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:54,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:54,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2044748711, now seen corresponding path program 354 times [2022-02-16 13:50:54,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:54,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654918514] [2022-02-16 13:50:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:54,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:50:54,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:54,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654918514] [2022-02-16 13:50:54,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654918514] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:54,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565330620] [2022-02-16 13:50:54,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:54,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:54,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:54,953 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:54,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-02-16 13:50:54,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:50:54,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:54,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:55,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:55,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:50:55,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:55,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:50:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:55,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:55,302 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:55,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:55,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:50:55,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565330620] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:55,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:55,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:50:55,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574100289] [2022-02-16 13:50:55,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:55,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:55,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:55,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:55,322 INFO L87 Difference]: Start difference. First operand 1186 states and 3400 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:55,856 INFO L93 Difference]: Finished difference Result 1244 states and 3512 transitions. [2022-02-16 13:50:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:50:55,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:55,858 INFO L225 Difference]: With dead ends: 1244 [2022-02-16 13:50:55,858 INFO L226 Difference]: Without dead ends: 1242 [2022-02-16 13:50:55,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:50:55,858 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:55,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:55,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-02-16 13:50:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1180. [2022-02-16 13:50:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 2.867684478371501) internal successors, (3381), 1179 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3381 transitions. [2022-02-16 13:50:55,870 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3381 transitions. Word has length 17 [2022-02-16 13:50:55,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:55,870 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3381 transitions. [2022-02-16 13:50:55,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3381 transitions. [2022-02-16 13:50:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:55,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:55,871 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:55,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:56,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:56,087 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:56,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1683195255, now seen corresponding path program 355 times [2022-02-16 13:50:56,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:56,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312406986] [2022-02-16 13:50:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:56,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:56,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:56,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312406986] [2022-02-16 13:50:56,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312406986] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:56,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009210130] [2022-02-16 13:50:56,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:56,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:56,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:56,172 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:56,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-02-16 13:50:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:56,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:56,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:56,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:56,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:56,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:56,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:56,434 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:56,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:56,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:56,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009210130] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:56,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:56,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:50:56,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749996137] [2022-02-16 13:50:56,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:56,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:56,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:56,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:56,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:56,454 INFO L87 Difference]: Start difference. First operand 1180 states and 3381 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:56,720 INFO L93 Difference]: Finished difference Result 1321 states and 3662 transitions. [2022-02-16 13:50:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:50:56,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:56,739 INFO L225 Difference]: With dead ends: 1321 [2022-02-16 13:50:56,739 INFO L226 Difference]: Without dead ends: 1321 [2022-02-16 13:50:56,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:56,739 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:56,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 144 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 710 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-02-16 13:50:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-02-16 13:50:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1202. [2022-02-16 13:50:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 2.8800999167360533) internal successors, (3459), 1201 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3459 transitions. [2022-02-16 13:50:56,786 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3459 transitions. Word has length 17 [2022-02-16 13:50:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:56,786 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 3459 transitions. [2022-02-16 13:50:56,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3459 transitions. [2022-02-16 13:50:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:56,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:56,787 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:56,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:56,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:56,997 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1057722917, now seen corresponding path program 356 times [2022-02-16 13:50:56,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:56,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263101579] [2022-02-16 13:50:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:56,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:57,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:57,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263101579] [2022-02-16 13:50:57,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263101579] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:57,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750807254] [2022-02-16 13:50:57,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:57,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:57,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:57,094 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:57,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-02-16 13:50:57,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:57,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:57,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:57,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:57,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:57,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:57,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:57,445 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:57,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:57,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:57,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750807254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:57,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:57,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-16 13:50:57,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828726280] [2022-02-16 13:50:57,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:57,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:57,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:57,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:57,476 INFO L87 Difference]: Start difference. First operand 1202 states and 3459 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:57,869 INFO L93 Difference]: Finished difference Result 1262 states and 3531 transitions. [2022-02-16 13:50:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:50:57,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:57,872 INFO L225 Difference]: With dead ends: 1262 [2022-02-16 13:50:57,872 INFO L226 Difference]: Without dead ends: 1256 [2022-02-16 13:50:57,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:50:57,872 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:57,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 114 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 624 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-02-16 13:50:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-02-16 13:50:57,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1203. [2022-02-16 13:50:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 2.875207986688852) internal successors, (3456), 1202 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3456 transitions. [2022-02-16 13:50:57,887 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3456 transitions. Word has length 17 [2022-02-16 13:50:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:57,888 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 3456 transitions. [2022-02-16 13:50:57,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3456 transitions. [2022-02-16 13:50:57,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:57,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:57,889 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:57,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:58,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2022-02-16 13:50:58,103 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:58,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1922837593, now seen corresponding path program 357 times [2022-02-16 13:50:58,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:58,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555989154] [2022-02-16 13:50:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:58,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:58,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:58,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555989154] [2022-02-16 13:50:58,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555989154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:58,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924531606] [2022-02-16 13:50:58,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:58,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:58,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:58,187 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:58,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-02-16 13:50:58,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:50:58,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:58,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:58,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:58,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:58,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:50:58,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:58,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:50:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:58,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:58,513 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:58,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:50:58,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:50:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:58,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924531606] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:58,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:58,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:50:58,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594075928] [2022-02-16 13:50:58,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:58,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:58,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:58,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:58,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:58,539 INFO L87 Difference]: Start difference. First operand 1203 states and 3456 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:59,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:59,182 INFO L93 Difference]: Finished difference Result 1347 states and 3708 transitions. [2022-02-16 13:50:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:50:59,182 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:50:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:59,185 INFO L225 Difference]: With dead ends: 1347 [2022-02-16 13:50:59,185 INFO L226 Difference]: Without dead ends: 1344 [2022-02-16 13:50:59,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:50:59,185 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:59,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 104 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 677 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-02-16 13:50:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-02-16 13:50:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1201. [2022-02-16 13:50:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 2.8733333333333335) internal successors, (3448), 1200 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3448 transitions. [2022-02-16 13:50:59,200 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3448 transitions. Word has length 17 [2022-02-16 13:50:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:59,200 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 3448 transitions. [2022-02-16 13:50:59,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3448 transitions. [2022-02-16 13:50:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:50:59,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:59,201 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:59,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:59,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:59,417 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:50:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:59,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1003136885, now seen corresponding path program 358 times [2022-02-16 13:50:59,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:59,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819266114] [2022-02-16 13:50:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:59,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:59,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:59,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819266114] [2022-02-16 13:50:59,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819266114] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:59,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643453560] [2022-02-16 13:50:59,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:59,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:59,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:59,484 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:59,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-02-16 13:50:59,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:59,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:59,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:50:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:59,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:59,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:50:59,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:50:59,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:50:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:59,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:59,725 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:50:59,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:50:59,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:50:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:59,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643453560] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:59,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:59,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:50:59,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634857174] [2022-02-16 13:50:59,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:59,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:59,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:59,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:59,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:59,744 INFO L87 Difference]: Start difference. First operand 1201 states and 3448 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:00,094 INFO L93 Difference]: Finished difference Result 1256 states and 3516 transitions. [2022-02-16 13:51:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:51:00,095 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:00,097 INFO L225 Difference]: With dead ends: 1256 [2022-02-16 13:51:00,097 INFO L226 Difference]: Without dead ends: 1251 [2022-02-16 13:51:00,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:51:00,098 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:00,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 88 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 657 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-02-16 13:51:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-02-16 13:51:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1202. [2022-02-16 13:51:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 2.869275603663614) internal successors, (3446), 1201 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:00,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3446 transitions. [2022-02-16 13:51:00,112 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3446 transitions. Word has length 17 [2022-02-16 13:51:00,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:00,112 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 3446 transitions. [2022-02-16 13:51:00,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3446 transitions. [2022-02-16 13:51:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:00,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:00,114 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:00,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:00,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:00,330 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1930567991, now seen corresponding path program 359 times [2022-02-16 13:51:00,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:00,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381012610] [2022-02-16 13:51:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:00,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:00,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:00,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381012610] [2022-02-16 13:51:00,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381012610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:00,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086325220] [2022-02-16 13:51:00,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:00,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:00,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:00,427 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:00,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-02-16 13:51:00,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 13:51:00,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:00,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:00,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:00,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:00,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:00,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:00,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:00,726 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:51:00,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:51:00,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:51:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:00,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086325220] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:00,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:00,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-02-16 13:51:00,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059890425] [2022-02-16 13:51:00,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:00,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:00,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:00,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:00,746 INFO L87 Difference]: Start difference. First operand 1202 states and 3446 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:01,497 INFO L93 Difference]: Finished difference Result 1445 states and 3853 transitions. [2022-02-16 13:51:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:51:01,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:01,500 INFO L225 Difference]: With dead ends: 1445 [2022-02-16 13:51:01,500 INFO L226 Difference]: Without dead ends: 1441 [2022-02-16 13:51:01,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 13:51:01,500 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:01,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 150 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:51:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2022-02-16 13:51:01,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1203. [2022-02-16 13:51:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 2.868552412645591) internal successors, (3448), 1202 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3448 transitions. [2022-02-16 13:51:01,539 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3448 transitions. Word has length 17 [2022-02-16 13:51:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:01,539 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 3448 transitions. [2022-02-16 13:51:01,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3448 transitions. [2022-02-16 13:51:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:01,541 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:01,541 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:01,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:01,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:01,755 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1562783077, now seen corresponding path program 360 times [2022-02-16 13:51:01,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:01,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349038330] [2022-02-16 13:51:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:01,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:01,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:01,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349038330] [2022-02-16 13:51:01,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349038330] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:01,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612178221] [2022-02-16 13:51:01,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:01,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:01,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:01,857 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:01,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-02-16 13:51:01,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:51:01,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:01,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:02,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:02,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:02,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:02,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:02,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:02,154 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:51:02,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:51:02,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:51:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:02,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612178221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:02,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:02,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-02-16 13:51:02,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914902848] [2022-02-16 13:51:02,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:02,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:02,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:02,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:02,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:02,179 INFO L87 Difference]: Start difference. First operand 1203 states and 3448 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:02,703 INFO L93 Difference]: Finished difference Result 1325 states and 3629 transitions. [2022-02-16 13:51:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:51:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:02,706 INFO L225 Difference]: With dead ends: 1325 [2022-02-16 13:51:02,706 INFO L226 Difference]: Without dead ends: 1321 [2022-02-16 13:51:02,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:51:02,706 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:02,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 120 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:51:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-02-16 13:51:02,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1213. [2022-02-16 13:51:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.8704620462046204) internal successors, (3479), 1212 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 3479 transitions. [2022-02-16 13:51:02,732 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 3479 transitions. Word has length 17 [2022-02-16 13:51:02,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:02,732 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 3479 transitions. [2022-02-16 13:51:02,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:02,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 3479 transitions. [2022-02-16 13:51:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:02,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:02,733 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:02,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:02,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:02,949 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:02,949 INFO L85 PathProgramCache]: Analyzing trace with hash 155560629, now seen corresponding path program 361 times [2022-02-16 13:51:02,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:02,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704801541] [2022-02-16 13:51:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:02,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:03,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:03,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704801541] [2022-02-16 13:51:03,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704801541] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:03,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120821794] [2022-02-16 13:51:03,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:03,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:03,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:03,032 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:03,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-02-16 13:51:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:03,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:03,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:03,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:03,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:03,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:03,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:03,351 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:51:03,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:51:03,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:51:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:03,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120821794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:03,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:03,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-16 13:51:03,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100406325] [2022-02-16 13:51:03,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:03,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:03,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:03,377 INFO L87 Difference]: Start difference. First operand 1213 states and 3479 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:03,725 INFO L93 Difference]: Finished difference Result 1299 states and 3589 transitions. [2022-02-16 13:51:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:51:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:03,728 INFO L225 Difference]: With dead ends: 1299 [2022-02-16 13:51:03,728 INFO L226 Difference]: Without dead ends: 1299 [2022-02-16 13:51:03,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:51:03,728 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:03,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 184 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-02-16 13:51:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1196. [2022-02-16 13:51:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 1195 states have (on average 2.8535564853556483) internal successors, (3410), 1195 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 3410 transitions. [2022-02-16 13:51:03,742 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 3410 transitions. Word has length 17 [2022-02-16 13:51:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:03,743 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 3410 transitions. [2022-02-16 13:51:03,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 3410 transitions. [2022-02-16 13:51:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:03,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:03,744 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:03,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:03,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:03,959 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:03,959 INFO L85 PathProgramCache]: Analyzing trace with hash 316207261, now seen corresponding path program 362 times [2022-02-16 13:51:03,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:03,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302803157] [2022-02-16 13:51:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:03,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:51:04,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:04,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302803157] [2022-02-16 13:51:04,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302803157] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:04,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379546038] [2022-02-16 13:51:04,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:04,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:04,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:04,047 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:04,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-02-16 13:51:04,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:04,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:04,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:04,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:04,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:04,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:04,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:04,358 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:51:04,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:51:04,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:51:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:51:04,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379546038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:04,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:04,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:51:04,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168297417] [2022-02-16 13:51:04,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:04,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:04,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:04,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:04,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:04,385 INFO L87 Difference]: Start difference. First operand 1196 states and 3410 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:04,822 INFO L93 Difference]: Finished difference Result 1261 states and 3539 transitions. [2022-02-16 13:51:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:51:04,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:04,825 INFO L225 Difference]: With dead ends: 1261 [2022-02-16 13:51:04,825 INFO L226 Difference]: Without dead ends: 1259 [2022-02-16 13:51:04,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:51:04,825 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:04,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 50 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-02-16 13:51:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1192. [2022-02-16 13:51:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.8488664987405543) internal successors, (3393), 1191 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 3393 transitions. [2022-02-16 13:51:04,838 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 3393 transitions. Word has length 17 [2022-02-16 13:51:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:04,838 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 3393 transitions. [2022-02-16 13:51:04,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 3393 transitions. [2022-02-16 13:51:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:04,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:04,839 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:04,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:05,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-02-16 13:51:05,052 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1950236771, now seen corresponding path program 363 times [2022-02-16 13:51:05,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:05,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462066700] [2022-02-16 13:51:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:05,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:05,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:05,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462066700] [2022-02-16 13:51:05,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462066700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:05,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132033457] [2022-02-16 13:51:05,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:05,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:05,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:05,110 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:05,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-02-16 13:51:05,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:51:05,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:05,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-16 13:51:05,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:05,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:05,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-02-16 13:51:05,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:05,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 2 [2022-02-16 13:51:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:05,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:05,380 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:51:05,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:51:05,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:51:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:05,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132033457] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:05,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:05,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:51:05,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164884328] [2022-02-16 13:51:05,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:05,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:05,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:05,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:05,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:05,405 INFO L87 Difference]: Start difference. First operand 1192 states and 3393 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:05,621 INFO L93 Difference]: Finished difference Result 1331 states and 3714 transitions. [2022-02-16 13:51:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:51:05,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:05,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:05,624 INFO L225 Difference]: With dead ends: 1331 [2022-02-16 13:51:05,624 INFO L226 Difference]: Without dead ends: 1331 [2022-02-16 13:51:05,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:05,624 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:05,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 94 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 500 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-02-16 13:51:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-02-16 13:51:05,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1239. [2022-02-16 13:51:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 2.878029079159935) internal successors, (3563), 1238 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3563 transitions. [2022-02-16 13:51:05,637 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3563 transitions. Word has length 17 [2022-02-16 13:51:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:05,638 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 3563 transitions. [2022-02-16 13:51:05,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3563 transitions. [2022-02-16 13:51:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:05,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:05,639 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:05,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:05,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:05,855 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:05,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1425029817, now seen corresponding path program 364 times [2022-02-16 13:51:05,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:05,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966153574] [2022-02-16 13:51:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:05,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:05,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:05,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966153574] [2022-02-16 13:51:05,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966153574] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:05,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385648015] [2022-02-16 13:51:05,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:05,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:05,916 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:05,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-02-16 13:51:05,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:05,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:05,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:05,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:06,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:06,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-16 13:51:06,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:06,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-16 13:51:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:06,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:06,261 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:51:06,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:51:06,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:51:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:06,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385648015] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:06,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:06,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:51:06,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643507212] [2022-02-16 13:51:06,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:06,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:06,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:06,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:06,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:06,282 INFO L87 Difference]: Start difference. First operand 1239 states and 3563 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:06,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:06,486 INFO L93 Difference]: Finished difference Result 1292 states and 3627 transitions. [2022-02-16 13:51:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:51:06,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:06,488 INFO L225 Difference]: With dead ends: 1292 [2022-02-16 13:51:06,488 INFO L226 Difference]: Without dead ends: 1288 [2022-02-16 13:51:06,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:51:06,488 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:06,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 84 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 463 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-02-16 13:51:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2022-02-16 13:51:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1239. [2022-02-16 13:51:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 2.873990306946688) internal successors, (3558), 1238 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3558 transitions. [2022-02-16 13:51:06,502 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3558 transitions. Word has length 17 [2022-02-16 13:51:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:06,502 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 3558 transitions. [2022-02-16 13:51:06,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3558 transitions. [2022-02-16 13:51:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:06,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:06,503 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:06,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:06,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-02-16 13:51:06,707 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1942506373, now seen corresponding path program 365 times [2022-02-16 13:51:06,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:06,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343042129] [2022-02-16 13:51:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:06,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:06,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:06,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343042129] [2022-02-16 13:51:06,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343042129] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:06,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857629970] [2022-02-16 13:51:06,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:06,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:06,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:06,768 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:06,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-02-16 13:51:06,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:51:06,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:06,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:06,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:06,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:06,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:06,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:06,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:06,978 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:51:06,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-16 13:51:06,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:51:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:06,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857629970] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:06,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:06,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:51:06,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761712904] [2022-02-16 13:51:06,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:06,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:06,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:06,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:06,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:06,997 INFO L87 Difference]: Start difference. First operand 1239 states and 3558 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:07,221 INFO L93 Difference]: Finished difference Result 1388 states and 3815 transitions. [2022-02-16 13:51:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:51:07,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:07,237 INFO L225 Difference]: With dead ends: 1388 [2022-02-16 13:51:07,237 INFO L226 Difference]: Without dead ends: 1387 [2022-02-16 13:51:07,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:07,237 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 94 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:07,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 90 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-02-16 13:51:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1251. [2022-02-16 13:51:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 2.8808) internal successors, (3601), 1250 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 3601 transitions. [2022-02-16 13:51:07,251 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 3601 transitions. Word has length 17 [2022-02-16 13:51:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:07,267 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 3601 transitions. [2022-02-16 13:51:07,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 3601 transitions. [2022-02-16 13:51:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:07,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:07,268 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:07,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:07,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-02-16 13:51:07,485 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:07,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1140890145, now seen corresponding path program 366 times [2022-02-16 13:51:07,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:07,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747951138] [2022-02-16 13:51:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:07,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:07,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:07,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747951138] [2022-02-16 13:51:07,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747951138] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:07,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777211627] [2022-02-16 13:51:07,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:07,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:07,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:07,545 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:07,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-02-16 13:51:07,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:51:07,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:07,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:07,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:07,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:07,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:07,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:07,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:07,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:07,747 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:51:07,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:51:07,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:51:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:07,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777211627] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:07,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:07,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 19 [2022-02-16 13:51:07,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940167973] [2022-02-16 13:51:07,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:07,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:51:07,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:51:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:51:07,766 INFO L87 Difference]: Start difference. First operand 1251 states and 3601 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:08,153 INFO L93 Difference]: Finished difference Result 1358 states and 3778 transitions. [2022-02-16 13:51:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:51:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:08,169 INFO L225 Difference]: With dead ends: 1358 [2022-02-16 13:51:08,169 INFO L226 Difference]: Without dead ends: 1355 [2022-02-16 13:51:08,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:51:08,169 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 102 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:08,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 74 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-02-16 13:51:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1267. [2022-02-16 13:51:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 2.8886255924170614) internal successors, (3657), 1266 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 3657 transitions. [2022-02-16 13:51:08,192 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 3657 transitions. Word has length 17 [2022-02-16 13:51:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:08,192 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 3657 transitions. [2022-02-16 13:51:08,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 3657 transitions. [2022-02-16 13:51:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:08,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:08,193 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:08,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:08,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2022-02-16 13:51:08,409 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:08,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:08,409 INFO L85 PathProgramCache]: Analyzing trace with hash 577453561, now seen corresponding path program 367 times [2022-02-16 13:51:08,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:08,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123478613] [2022-02-16 13:51:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:08,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:08,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:08,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123478613] [2022-02-16 13:51:08,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123478613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:08,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479444164] [2022-02-16 13:51:08,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:08,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:08,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:08,490 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:08,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-02-16 13:51:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:08,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:08,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:08,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:08,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:08,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:08,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:08,771 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:51:08,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:51:08,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:51:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:08,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479444164] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:08,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:08,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:51:08,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095213468] [2022-02-16 13:51:08,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:08,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:08,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:08,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:08,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:08,803 INFO L87 Difference]: Start difference. First operand 1267 states and 3657 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:09,181 INFO L93 Difference]: Finished difference Result 1338 states and 3735 transitions. [2022-02-16 13:51:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:51:09,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:09,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:09,184 INFO L225 Difference]: With dead ends: 1338 [2022-02-16 13:51:09,184 INFO L226 Difference]: Without dead ends: 1338 [2022-02-16 13:51:09,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:09,184 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:09,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 134 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:51:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-02-16 13:51:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1242. [2022-02-16 13:51:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 2.8662369057211925) internal successors, (3557), 1241 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 3557 transitions. [2022-02-16 13:51:09,213 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 3557 transitions. Word has length 17 [2022-02-16 13:51:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:09,213 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 3557 transitions. [2022-02-16 13:51:09,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 3557 transitions. [2022-02-16 13:51:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:09,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:09,214 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:09,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:09,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2022-02-16 13:51:09,428 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1824390183, now seen corresponding path program 368 times [2022-02-16 13:51:09,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:09,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912616246] [2022-02-16 13:51:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:09,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:51:09,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:09,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912616246] [2022-02-16 13:51:09,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912616246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:09,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299576672] [2022-02-16 13:51:09,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:09,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:09,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:09,499 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:09,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-02-16 13:51:09,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:09,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:09,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:09,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:09,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:09,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:09,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:09,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:09,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:09,741 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:51:09,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:51:09,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:51:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:51:09,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299576672] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:09,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:09,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:51:09,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173809931] [2022-02-16 13:51:09,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:09,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:09,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:09,767 INFO L87 Difference]: Start difference. First operand 1242 states and 3557 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:10,186 INFO L93 Difference]: Finished difference Result 1368 states and 3772 transitions. [2022-02-16 13:51:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:51:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:10,189 INFO L225 Difference]: With dead ends: 1368 [2022-02-16 13:51:10,189 INFO L226 Difference]: Without dead ends: 1366 [2022-02-16 13:51:10,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:51:10,189 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 89 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:10,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 80 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2022-02-16 13:51:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1262. [2022-02-16 13:51:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.8715305313243458) internal successors, (3621), 1261 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3621 transitions. [2022-02-16 13:51:10,202 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3621 transitions. Word has length 17 [2022-02-16 13:51:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:10,202 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 3621 transitions. [2022-02-16 13:51:10,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:10,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3621 transitions. [2022-02-16 13:51:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:10,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:10,204 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:10,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:10,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:10,410 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash -95342849, now seen corresponding path program 369 times [2022-02-16 13:51:10,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:10,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241301044] [2022-02-16 13:51:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:10,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:51:10,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:10,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241301044] [2022-02-16 13:51:10,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241301044] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:10,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097971062] [2022-02-16 13:51:10,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:10,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:10,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:10,493 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:10,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-02-16 13:51:10,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:51:10,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:10,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:10,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:10,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:10,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-16 13:51:10,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:10,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-16 13:51:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:10,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:10,783 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-16 13:51:10,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-16 13:51:10,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:51:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:51:10,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097971062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:10,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:10,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-16 13:51:10,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995228037] [2022-02-16 13:51:10,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:10,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:10,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:10,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:10,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:10,814 INFO L87 Difference]: Start difference. First operand 1262 states and 3621 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:11,185 INFO L93 Difference]: Finished difference Result 1313 states and 3681 transitions. [2022-02-16 13:51:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:51:11,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:11,187 INFO L225 Difference]: With dead ends: 1313 [2022-02-16 13:51:11,187 INFO L226 Difference]: Without dead ends: 1309 [2022-02-16 13:51:11,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:51:11,188 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:11,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 74 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-02-16 13:51:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1262. [2022-02-16 13:51:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.864393338620143) internal successors, (3612), 1261 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:11,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3612 transitions. [2022-02-16 13:51:11,201 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3612 transitions. Word has length 17 [2022-02-16 13:51:11,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:11,201 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 3612 transitions. [2022-02-16 13:51:11,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:11,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3612 transitions. [2022-02-16 13:51:11,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:11,202 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:11,202 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:11,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Ended with exit code 0 [2022-02-16 13:51:11,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:11,403 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:11,403 INFO L85 PathProgramCache]: Analyzing trace with hash 842049719, now seen corresponding path program 370 times [2022-02-16 13:51:11,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:11,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560840474] [2022-02-16 13:51:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:11,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:11,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:11,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560840474] [2022-02-16 13:51:11,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560840474] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:11,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366660171] [2022-02-16 13:51:11,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:11,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:11,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:11,514 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:11,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-02-16 13:51:11,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:11,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:11,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:11,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:11,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:11,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:11,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:11,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:11,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:11,897 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:51:11,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-16 13:51:11,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-16 13:51:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:11,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366660171] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:11,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:11,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-16 13:51:11,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483005850] [2022-02-16 13:51:11,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:11,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:51:11,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:11,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:51:11,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:51:11,922 INFO L87 Difference]: Start difference. First operand 1262 states and 3612 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:12,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:12,256 INFO L93 Difference]: Finished difference Result 1422 states and 3900 transitions. [2022-02-16 13:51:12,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:51:12,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:12,260 INFO L225 Difference]: With dead ends: 1422 [2022-02-16 13:51:12,260 INFO L226 Difference]: Without dead ends: 1421 [2022-02-16 13:51:12,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:51:12,262 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 171 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:12,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 90 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2022-02-16 13:51:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1286. [2022-02-16 13:51:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 2.8785992217898833) internal successors, (3699), 1285 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 3699 transitions. [2022-02-16 13:51:12,278 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 3699 transitions. Word has length 17 [2022-02-16 13:51:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:12,279 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 3699 transitions. [2022-02-16 13:51:12,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 3699 transitions. [2022-02-16 13:51:12,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:12,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:12,280 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:12,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Ended with exit code 0 [2022-02-16 13:51:12,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:12,496 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:12,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1643665947, now seen corresponding path program 371 times [2022-02-16 13:51:12,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:12,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657057577] [2022-02-16 13:51:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:12,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:12,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:12,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657057577] [2022-02-16 13:51:12,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657057577] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:12,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151207500] [2022-02-16 13:51:12,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:12,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:12,618 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:12,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-02-16 13:51:12,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 13:51:12,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:12,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:12,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:12,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:12,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:12,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:13,017 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:51:13,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:51:13,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:51:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:13,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151207500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:13,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:13,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:51:13,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840059081] [2022-02-16 13:51:13,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:13,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:51:13,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:51:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:13,040 INFO L87 Difference]: Start difference. First operand 1286 states and 3699 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:14,199 INFO L93 Difference]: Finished difference Result 1447 states and 3955 transitions. [2022-02-16 13:51:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 13:51:14,200 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:14,202 INFO L225 Difference]: With dead ends: 1447 [2022-02-16 13:51:14,202 INFO L226 Difference]: Without dead ends: 1440 [2022-02-16 13:51:14,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=2477, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 13:51:14,202 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 169 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:14,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 118 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:51:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2022-02-16 13:51:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1319. [2022-02-16 13:51:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 2.8846737481031868) internal successors, (3802), 1318 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 3802 transitions. [2022-02-16 13:51:14,218 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 3802 transitions. Word has length 17 [2022-02-16 13:51:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:14,218 INFO L470 AbstractCegarLoop]: Abstraction has 1319 states and 3802 transitions. [2022-02-16 13:51:14,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 3802 transitions. [2022-02-16 13:51:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:14,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:14,220 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:14,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:14,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:14,436 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:14,436 INFO L85 PathProgramCache]: Analyzing trace with hash -932957643, now seen corresponding path program 372 times [2022-02-16 13:51:14,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:14,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360662583] [2022-02-16 13:51:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:14,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:14,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:14,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360662583] [2022-02-16 13:51:14,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360662583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:14,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004779931] [2022-02-16 13:51:14,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:14,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:14,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:14,559 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:14,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-02-16 13:51:14,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:51:14,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:14,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:14,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:14,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:14,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-16 13:51:14,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:14,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-16 13:51:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:14,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:14,848 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:51:14,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:51:14,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:51:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:14,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004779931] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:14,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:14,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-16 13:51:14,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413962309] [2022-02-16 13:51:14,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:14,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:51:14,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:51:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:51:14,861 INFO L87 Difference]: Start difference. First operand 1319 states and 3802 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:15,538 INFO L93 Difference]: Finished difference Result 1445 states and 3941 transitions. [2022-02-16 13:51:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:51:15,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:15,541 INFO L225 Difference]: With dead ends: 1445 [2022-02-16 13:51:15,541 INFO L226 Difference]: Without dead ends: 1444 [2022-02-16 13:51:15,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 13:51:15,541 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 128 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:15,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 90 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-02-16 13:51:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1285. [2022-02-16 13:51:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 2.8598130841121496) internal successors, (3672), 1284 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3672 transitions. [2022-02-16 13:51:15,555 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3672 transitions. Word has length 17 [2022-02-16 13:51:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:15,555 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 3672 transitions. [2022-02-16 13:51:15,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3672 transitions. [2022-02-16 13:51:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:15,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:15,556 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:15,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:15,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2022-02-16 13:51:15,771 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:15,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1651396345, now seen corresponding path program 373 times [2022-02-16 13:51:15,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:15,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383605193] [2022-02-16 13:51:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:15,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:15,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:15,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383605193] [2022-02-16 13:51:15,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383605193] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:15,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404130725] [2022-02-16 13:51:15,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:15,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:15,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:15,870 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:15,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-02-16 13:51:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:15,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:16,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:16,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:51:16,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:16,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:51:16,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:16,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:51:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:16,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:16,245 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:51:16,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:51:16,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:51:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:16,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404130725] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:16,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:16,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-16 13:51:16,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272066975] [2022-02-16 13:51:16,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:16,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:51:16,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:51:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:16,267 INFO L87 Difference]: Start difference. First operand 1285 states and 3672 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:17,131 INFO L93 Difference]: Finished difference Result 1407 states and 3857 transitions. [2022-02-16 13:51:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-16 13:51:17,132 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:17,134 INFO L225 Difference]: With dead ends: 1407 [2022-02-16 13:51:17,134 INFO L226 Difference]: Without dead ends: 1407 [2022-02-16 13:51:17,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 13:51:17,134 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:17,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 66 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:51:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-02-16 13:51:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1257. [2022-02-16 13:51:17,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.8447452229299364) internal successors, (3573), 1256 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3573 transitions. [2022-02-16 13:51:17,148 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3573 transitions. Word has length 17 [2022-02-16 13:51:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:17,148 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 3573 transitions. [2022-02-16 13:51:17,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3573 transitions. [2022-02-16 13:51:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:17,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:17,150 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:17,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:17,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-02-16 13:51:17,363 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:17,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:17,363 INFO L85 PathProgramCache]: Analyzing trace with hash 161991349, now seen corresponding path program 374 times [2022-02-16 13:51:17,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:17,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601320886] [2022-02-16 13:51:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:17,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:17,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:17,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601320886] [2022-02-16 13:51:17,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601320886] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:17,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091192579] [2022-02-16 13:51:17,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:17,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:17,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:17,446 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:17,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-02-16 13:51:17,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:17,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:17,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:17,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:51:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:17,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:51:17,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:17,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:51:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:17,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:17,671 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:51:17,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:51:17,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:51:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:17,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091192579] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:17,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:17,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 13:51:17,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982039718] [2022-02-16 13:51:17,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:17,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:17,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:17,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:17,685 INFO L87 Difference]: Start difference. First operand 1257 states and 3573 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:18,554 INFO L93 Difference]: Finished difference Result 1369 states and 3780 transitions. [2022-02-16 13:51:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 13:51:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:18,557 INFO L225 Difference]: With dead ends: 1369 [2022-02-16 13:51:18,557 INFO L226 Difference]: Without dead ends: 1369 [2022-02-16 13:51:18,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=436, Invalid=2644, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 13:51:18,557 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:18,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 54 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-02-16 13:51:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1240. [2022-02-16 13:51:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.845036319612591) internal successors, (3525), 1239 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3525 transitions. [2022-02-16 13:51:18,571 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3525 transitions. Word has length 17 [2022-02-16 13:51:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:18,571 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 3525 transitions. [2022-02-16 13:51:18,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3525 transitions. [2022-02-16 13:51:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:51:18,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:18,572 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:18,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:18,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2022-02-16 13:51:18,791 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:18,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:18,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1235076729, now seen corresponding path program 375 times [2022-02-16 13:51:18,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:18,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442686569] [2022-02-16 13:51:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:18,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:18,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:18,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442686569] [2022-02-16 13:51:18,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442686569] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:18,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690272877] [2022-02-16 13:51:18,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:18,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:18,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:18,877 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:18,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-02-16 13:51:18,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:51:18,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:18,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:51:18,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:19,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:19,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:51:19,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:19,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-16 13:51:19,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:19,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-16 13:51:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:19,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:19,206 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-16 13:51:19,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-16 13:51:19,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 13:51:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:19,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690272877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:19,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:19,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-16 13:51:19,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849613765] [2022-02-16 13:51:19,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:19,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:19,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:19,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:19,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:19,227 INFO L87 Difference]: Start difference. First operand 1240 states and 3525 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:19,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:19,503 INFO L93 Difference]: Finished difference Result 1287 states and 3602 transitions. [2022-02-16 13:51:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:51:19,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:51:19,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:19,505 INFO L225 Difference]: With dead ends: 1287 [2022-02-16 13:51:19,505 INFO L226 Difference]: Without dead ends: 1287 [2022-02-16 13:51:19,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:19,505 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:19,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-02-16 13:51:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1222. [2022-02-16 13:51:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 2.845208845208845) internal successors, (3474), 1221 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3474 transitions. [2022-02-16 13:51:19,517 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3474 transitions. Word has length 17 [2022-02-16 13:51:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:19,517 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 3474 transitions. [2022-02-16 13:51:19,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3474 transitions. [2022-02-16 13:51:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:51:19,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:19,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:19,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-02-16 13:51:19,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-02-16 13:51:19,734 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:19,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:19,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1071632419, now seen corresponding path program 376 times [2022-02-16 13:51:19,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:19,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808396015] [2022-02-16 13:51:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:19,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:20,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:20,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808396015] [2022-02-16 13:51:20,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808396015] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:20,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093968415] [2022-02-16 13:51:20,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:20,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:20,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:20,110 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:20,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-02-16 13:51:20,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:20,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:20,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:51:20,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:20,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:20,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:20,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:20,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:20,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:20,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:20,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:20,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:20,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:20,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:20,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:51:20,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:20,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:51:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:20,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:22,136 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:51:22,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:51:22,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:22,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:22,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:22,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:22,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:22,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:22,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:22,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:51:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:22,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093968415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:22,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:22,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:51:22,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386933403] [2022-02-16 13:51:22,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:22,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:51:22,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:51:22,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:51:22,910 INFO L87 Difference]: Start difference. First operand 1222 states and 3474 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:24,045 INFO L93 Difference]: Finished difference Result 1638 states and 4505 transitions. [2022-02-16 13:51:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:51:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:51:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:24,047 INFO L225 Difference]: With dead ends: 1638 [2022-02-16 13:51:24,047 INFO L226 Difference]: Without dead ends: 1635 [2022-02-16 13:51:24,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=153, Invalid=1739, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 13:51:24,048 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:24,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 27 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 703 Invalid, 0 Unknown, 268 Unchecked, 0.4s Time] [2022-02-16 13:51:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-02-16 13:51:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1225. [2022-02-16 13:51:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 2.8423202614379086) internal successors, (3479), 1224 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 3479 transitions. [2022-02-16 13:51:24,061 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 3479 transitions. Word has length 18 [2022-02-16 13:51:24,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:24,061 INFO L470 AbstractCegarLoop]: Abstraction has 1225 states and 3479 transitions. [2022-02-16 13:51:24,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:24,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 3479 transitions. [2022-02-16 13:51:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:51:24,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:24,062 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:24,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:24,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-02-16 13:51:24,275 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:24,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1601118559, now seen corresponding path program 377 times [2022-02-16 13:51:24,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:24,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552782342] [2022-02-16 13:51:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:24,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:24,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:24,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552782342] [2022-02-16 13:51:24,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552782342] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:24,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316281367] [2022-02-16 13:51:24,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:24,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:24,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:24,755 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:24,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-02-16 13:51:24,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:51:24,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:24,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:51:24,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:25,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:25,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:25,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:25,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:25,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:25,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:25,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:25,575 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:51:25,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:51:25,580 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:51:25,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:51:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:25,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:26,815 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:51:26,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:51:26,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:26,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:26,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:26,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:26,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:26,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:26,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:26,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:51:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:27,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316281367] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:27,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:27,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-02-16 13:51:27,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321784775] [2022-02-16 13:51:27,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:27,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:51:27,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:51:27,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:51:27,546 INFO L87 Difference]: Start difference. First operand 1225 states and 3479 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:28,409 INFO L93 Difference]: Finished difference Result 1626 states and 4491 transitions. [2022-02-16 13:51:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:51:28,409 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:51:28,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:28,411 INFO L225 Difference]: With dead ends: 1626 [2022-02-16 13:51:28,411 INFO L226 Difference]: Without dead ends: 1623 [2022-02-16 13:51:28,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=146, Invalid=1660, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:51:28,412 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:28,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 23 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 521 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-02-16 13:51:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-02-16 13:51:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1229. [2022-02-16 13:51:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.842833876221498) internal successors, (3491), 1228 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3491 transitions. [2022-02-16 13:51:28,425 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3491 transitions. Word has length 18 [2022-02-16 13:51:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:28,425 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 3491 transitions. [2022-02-16 13:51:28,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3491 transitions. [2022-02-16 13:51:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:51:28,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:28,426 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:28,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:28,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:28,642 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:28,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:28,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1086327551, now seen corresponding path program 378 times [2022-02-16 13:51:28,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:28,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281075506] [2022-02-16 13:51:28,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:28,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:29,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:29,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281075506] [2022-02-16 13:51:29,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281075506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:29,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104988350] [2022-02-16 13:51:29,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:29,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:29,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:29,126 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:29,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-02-16 13:51:29,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:51:29,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:29,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:51:29,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:29,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:29,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:29,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:29,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:29,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:29,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:29,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:29,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:29,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:29,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:29,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:51:29,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:29,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:51:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:29,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:30,857 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:51:30,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 264 treesize of output 268 [2022-02-16 13:51:30,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:30,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:30,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:30,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:30,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:30,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:30,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:30,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 236 treesize of output 338 [2022-02-16 13:51:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:31,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104988350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:31,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:31,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-16 13:51:31,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357242909] [2022-02-16 13:51:31,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:31,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 13:51:31,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 13:51:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:51:31,473 INFO L87 Difference]: Start difference. First operand 1229 states and 3491 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:33,728 INFO L93 Difference]: Finished difference Result 1665 states and 4537 transitions. [2022-02-16 13:51:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:51:33,728 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:51:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:33,730 INFO L225 Difference]: With dead ends: 1665 [2022-02-16 13:51:33,730 INFO L226 Difference]: Without dead ends: 1662 [2022-02-16 13:51:33,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=243, Invalid=2727, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 13:51:33,731 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:33,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 23 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 863 Invalid, 0 Unknown, 355 Unchecked, 0.5s Time] [2022-02-16 13:51:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-02-16 13:51:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1228. [2022-02-16 13:51:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.842705786471068) internal successors, (3488), 1227 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3488 transitions. [2022-02-16 13:51:33,756 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3488 transitions. Word has length 18 [2022-02-16 13:51:33,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:33,756 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 3488 transitions. [2022-02-16 13:51:33,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:33,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3488 transitions. [2022-02-16 13:51:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:51:33,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:33,757 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:33,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Ended with exit code 0 [2022-02-16 13:51:33,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:33,959 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:33,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:33,960 INFO L85 PathProgramCache]: Analyzing trace with hash 642719783, now seen corresponding path program 379 times [2022-02-16 13:51:33,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:33,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270830126] [2022-02-16 13:51:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:33,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:34,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:34,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270830126] [2022-02-16 13:51:34,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270830126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:34,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353692354] [2022-02-16 13:51:34,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:34,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:34,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:34,457 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:34,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-02-16 13:51:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:34,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:51:34,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:35,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:35,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:35,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:35,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:35,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:35,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:35,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:35,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:51:35,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:35,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:51:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:35,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:36,764 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:51:36,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 264 treesize of output 268 [2022-02-16 13:51:36,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:36,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:36,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:36,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:36,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:36,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:36,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:36,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 236 treesize of output 338 [2022-02-16 13:51:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:37,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353692354] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:37,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:37,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-16 13:51:37,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334939167] [2022-02-16 13:51:37,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:37,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 13:51:37,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:37,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 13:51:37,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:51:37,696 INFO L87 Difference]: Start difference. First operand 1228 states and 3488 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:39,664 INFO L93 Difference]: Finished difference Result 1800 states and 4915 transitions. [2022-02-16 13:51:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:51:39,664 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:51:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:39,666 INFO L225 Difference]: With dead ends: 1800 [2022-02-16 13:51:39,666 INFO L226 Difference]: Without dead ends: 1797 [2022-02-16 13:51:39,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=227, Invalid=2425, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 13:51:39,667 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 45 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:39,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 24 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 743 Invalid, 0 Unknown, 167 Unchecked, 0.4s Time] [2022-02-16 13:51:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-02-16 13:51:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1228. [2022-02-16 13:51:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.842705786471068) internal successors, (3488), 1227 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3488 transitions. [2022-02-16 13:51:39,681 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3488 transitions. Word has length 18 [2022-02-16 13:51:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:39,681 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 3488 transitions. [2022-02-16 13:51:39,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3488 transitions. [2022-02-16 13:51:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:51:39,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:39,682 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:39,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:39,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2022-02-16 13:51:39,887 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:39,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1591387711, now seen corresponding path program 380 times [2022-02-16 13:51:39,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:39,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954205830] [2022-02-16 13:51:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:39,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:40,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:40,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954205830] [2022-02-16 13:51:40,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954205830] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:40,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153760980] [2022-02-16 13:51:40,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:40,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:40,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:40,266 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:40,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-02-16 13:51:40,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:40,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:40,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 13:51:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:41,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:41,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:41,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:41,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:41,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:41,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:41,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:41,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:41,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:41,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:41,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:51:41,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:41,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:51:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:41,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:42,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,487 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-16 13:51:42,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 270 treesize of output 270 [2022-02-16 13:51:42,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:42,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:42,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 336 [2022-02-16 13:51:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:43,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153760980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:43,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:43,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-02-16 13:51:43,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728380136] [2022-02-16 13:51:43,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:43,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 13:51:43,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 13:51:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:51:43,340 INFO L87 Difference]: Start difference. First operand 1228 states and 3488 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:50,862 INFO L93 Difference]: Finished difference Result 1894 states and 5152 transitions. [2022-02-16 13:51:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-16 13:51:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:51:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:50,865 INFO L225 Difference]: With dead ends: 1894 [2022-02-16 13:51:50,865 INFO L226 Difference]: Without dead ends: 1885 [2022-02-16 13:51:50,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=442, Invalid=4250, Unknown=0, NotChecked=0, Total=4692 [2022-02-16 13:51:50,865 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 138 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:50,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 57 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1255 Invalid, 0 Unknown, 189 Unchecked, 0.9s Time] [2022-02-16 13:51:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2022-02-16 13:51:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1231. [2022-02-16 13:51:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.841463414634146) internal successors, (3495), 1230 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3495 transitions. [2022-02-16 13:51:50,880 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3495 transitions. Word has length 18 [2022-02-16 13:51:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:50,880 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 3495 transitions. [2022-02-16 13:51:50,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:50,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3495 transitions. [2022-02-16 13:51:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:51:50,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:50,882 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:50,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:51,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:51,098 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:51,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash 734866147, now seen corresponding path program 381 times [2022-02-16 13:51:51,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:51,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267767892] [2022-02-16 13:51:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:51,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:51,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:51,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267767892] [2022-02-16 13:51:51,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267767892] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:51,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733562944] [2022-02-16 13:51:51,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:51,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:51,408 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:51,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-02-16 13:51:51,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:51:51,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:51,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:51:51,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:52,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:52,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:52,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:52,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:52,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:52,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:52,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:52,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:52,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 79 [2022-02-16 13:51:52,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:52,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:51:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:52,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:53,661 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:51:53,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 255 treesize of output 255 [2022-02-16 13:51:53,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:53,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:53,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:53,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:53,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:53,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:53,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:53,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 223 treesize of output 321 [2022-02-16 13:51:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:54,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733562944] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:54,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:54,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:51:54,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910006050] [2022-02-16 13:51:54,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:54,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:51:54,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:54,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:51:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:51:54,024 INFO L87 Difference]: Start difference. First operand 1231 states and 3495 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:56,339 INFO L93 Difference]: Finished difference Result 1585 states and 4309 transitions. [2022-02-16 13:51:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:51:56,339 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:51:56,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:56,341 INFO L225 Difference]: With dead ends: 1585 [2022-02-16 13:51:56,341 INFO L226 Difference]: Without dead ends: 1580 [2022-02-16 13:51:56,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=285, Invalid=2685, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 13:51:56,342 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:56,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 95 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 13:51:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-02-16 13:51:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1229. [2022-02-16 13:51:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.8566775244299674) internal successors, (3508), 1228 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3508 transitions. [2022-02-16 13:51:56,356 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3508 transitions. Word has length 18 [2022-02-16 13:51:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:56,356 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 3508 transitions. [2022-02-16 13:51:56,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3508 transitions. [2022-02-16 13:51:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:51:56,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:56,358 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:56,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:56,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:56,562 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:51:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash 742596545, now seen corresponding path program 382 times [2022-02-16 13:51:56,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:56,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896114372] [2022-02-16 13:51:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:56,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:56,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:56,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896114372] [2022-02-16 13:51:56,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896114372] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:56,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553862689] [2022-02-16 13:51:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:56,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:56,979 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:56,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-02-16 13:51:57,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:57,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:57,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:51:57,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:57,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:57,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:57,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:57,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:57,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:57,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:57,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:51:57,663 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:51:57,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:51:57,667 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:51:57,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:51:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:57,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:58,857 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:51:58,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:51:58,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:58,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:58,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:58,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:58,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:58,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:51:58,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:58,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:51:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:59,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553862689] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:59,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:59,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-02-16 13:51:59,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820638221] [2022-02-16 13:51:59,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:59,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:51:59,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:59,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:51:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:51:59,377 INFO L87 Difference]: Start difference. First operand 1229 states and 3508 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:02,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:02,438 INFO L93 Difference]: Finished difference Result 1586 states and 4319 transitions. [2022-02-16 13:52:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 13:52:02,438 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:52:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:02,440 INFO L225 Difference]: With dead ends: 1586 [2022-02-16 13:52:02,440 INFO L226 Difference]: Without dead ends: 1575 [2022-02-16 13:52:02,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=351, Invalid=3431, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 13:52:02,441 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 97 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:02,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 82 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1266 Invalid, 0 Unknown, 87 Unchecked, 0.8s Time] [2022-02-16 13:52:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-02-16 13:52:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1283. [2022-02-16 13:52:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 2.857254290171607) internal successors, (3663), 1282 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3663 transitions. [2022-02-16 13:52:02,454 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3663 transitions. Word has length 18 [2022-02-16 13:52:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:02,454 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 3663 transitions. [2022-02-16 13:52:02,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3663 transitions. [2022-02-16 13:52:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:52:02,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:02,456 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:02,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:02,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:02,671 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:52:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash -746808451, now seen corresponding path program 383 times [2022-02-16 13:52:02,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:02,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85357627] [2022-02-16 13:52:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:02,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:03,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:03,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85357627] [2022-02-16 13:52:03,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85357627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:03,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517136794] [2022-02-16 13:52:03,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:03,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:03,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:03,275 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:03,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-02-16 13:52:03,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:52:03,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:03,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:52:03,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:04,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:04,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:04,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:04,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:04,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:04,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:04,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:04,120 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:52:04,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:52:04,126 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:52:04,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:52:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:04,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:05,494 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:52:05,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 266 treesize of output 270 [2022-02-16 13:52:05,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:05,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:05,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:05,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:05,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:05,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:05,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:05,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 340 [2022-02-16 13:52:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:06,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517136794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:06,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:06,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-16 13:52:06,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967696764] [2022-02-16 13:52:06,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:06,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:52:06,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:06,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:52:06,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:52:06,217 INFO L87 Difference]: Start difference. First operand 1283 states and 3663 transitions. Second operand has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:09,674 INFO L93 Difference]: Finished difference Result 1565 states and 4316 transitions. [2022-02-16 13:52:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-16 13:52:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:52:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:09,677 INFO L225 Difference]: With dead ends: 1565 [2022-02-16 13:52:09,677 INFO L226 Difference]: Without dead ends: 1552 [2022-02-16 13:52:09,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=312, Invalid=2994, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 13:52:09,677 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:09,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 47 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1117 Invalid, 0 Unknown, 132 Unchecked, 0.8s Time] [2022-02-16 13:52:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2022-02-16 13:52:09,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1301. [2022-02-16 13:52:09,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 2.859230769230769) internal successors, (3717), 1300 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 3717 transitions. [2022-02-16 13:52:09,690 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 3717 transitions. Word has length 18 [2022-02-16 13:52:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:09,690 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 3717 transitions. [2022-02-16 13:52:09,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 3717 transitions. [2022-02-16 13:52:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:52:09,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:09,692 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:09,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:09,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:09,907 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:52:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash 860712735, now seen corresponding path program 384 times [2022-02-16 13:52:09,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:09,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000475642] [2022-02-16 13:52:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:09,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:10,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:10,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000475642] [2022-02-16 13:52:10,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000475642] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:10,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253746034] [2022-02-16 13:52:10,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:10,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:10,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:10,225 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:10,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-02-16 13:52:10,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:52:10,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:10,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 56 conjunts are in the unsatisfiable core [2022-02-16 13:52:10,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:11,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:11,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:11,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:11,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:11,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:11,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:11,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:11,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:11,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:11,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:11,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 100 [2022-02-16 13:52:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:11,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-16 13:52:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:11,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:12,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:12,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:12,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:12,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:12,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:12,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:13,014 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-16 13:52:13,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 262 treesize of output 264 [2022-02-16 13:52:13,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:13,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:13,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:13,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:13,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:13,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:13,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:13,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 232 treesize of output 332 [2022-02-16 13:52:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:14,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253746034] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:14,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:14,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-16 13:52:14,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656811526] [2022-02-16 13:52:14,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:14,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:52:14,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:14,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:52:14,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:52:14,307 INFO L87 Difference]: Start difference. First operand 1301 states and 3717 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:17,719 INFO L93 Difference]: Finished difference Result 1592 states and 4360 transitions. [2022-02-16 13:52:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-16 13:52:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:52:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:17,722 INFO L225 Difference]: With dead ends: 1592 [2022-02-16 13:52:17,722 INFO L226 Difference]: Without dead ends: 1579 [2022-02-16 13:52:17,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=422, Invalid=3738, Unknown=0, NotChecked=0, Total=4160 [2022-02-16 13:52:17,722 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 52 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:17,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 20 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1033 Invalid, 0 Unknown, 294 Unchecked, 0.7s Time] [2022-02-16 13:52:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-02-16 13:52:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1283. [2022-02-16 13:52:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 2.857254290171607) internal successors, (3663), 1282 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:17,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3663 transitions. [2022-02-16 13:52:17,736 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3663 transitions. Word has length 18 [2022-02-16 13:52:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:17,736 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 3663 transitions. [2022-02-16 13:52:17,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3663 transitions. [2022-02-16 13:52:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:52:17,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:17,738 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:17,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:17,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2022-02-16 13:52:17,951 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:52:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:17,951 INFO L85 PathProgramCache]: Analyzing trace with hash 326276929, now seen corresponding path program 385 times [2022-02-16 13:52:17,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:17,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082129069] [2022-02-16 13:52:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:17,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:18,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:18,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082129069] [2022-02-16 13:52:18,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082129069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:18,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050077772] [2022-02-16 13:52:18,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:52:18,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:18,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:18,469 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:18,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-02-16 13:52:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:18,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:52:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:19,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:19,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:19,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:19,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:19,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:19,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:19,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:19,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:19,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:52:19,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:19,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:52:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:19,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:20,637 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:52:20,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:52:20,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:20,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:20,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:20,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:20,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:20,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:20,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:20,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:52:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:21,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050077772] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:21,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:21,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:52:21,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247105464] [2022-02-16 13:52:21,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:21,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:52:21,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:52:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:52:21,232 INFO L87 Difference]: Start difference. First operand 1283 states and 3663 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:23,959 INFO L93 Difference]: Finished difference Result 1571 states and 4300 transitions. [2022-02-16 13:52:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:52:23,959 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:52:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:23,961 INFO L225 Difference]: With dead ends: 1571 [2022-02-16 13:52:23,961 INFO L226 Difference]: Without dead ends: 1559 [2022-02-16 13:52:23,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=256, Invalid=2936, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 13:52:23,963 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:23,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 71 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1279 Invalid, 0 Unknown, 246 Unchecked, 0.7s Time] [2022-02-16 13:52:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-02-16 13:52:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1288. [2022-02-16 13:52:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 2.8585858585858586) internal successors, (3679), 1287 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 3679 transitions. [2022-02-16 13:52:23,978 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 3679 transitions. Word has length 18 [2022-02-16 13:52:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:23,978 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 3679 transitions. [2022-02-16 13:52:23,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 3679 transitions. [2022-02-16 13:52:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:52:23,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:23,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:23,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:24,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2022-02-16 13:52:24,195 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:52:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash -632121847, now seen corresponding path program 386 times [2022-02-16 13:52:24,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:24,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718086057] [2022-02-16 13:52:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:24,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:24,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:24,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718086057] [2022-02-16 13:52:24,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718086057] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:24,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397247680] [2022-02-16 13:52:24,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:52:24,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:24,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:24,474 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:24,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-02-16 13:52:24,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:24,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:24,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:52:24,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:25,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:25,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:25,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:25,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:25,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:52:25,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:25,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:52:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:25,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:26,417 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:52:26,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:52:26,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:26,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:26,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:26,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:26,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:26,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:26,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:26,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:52:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:27,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397247680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:27,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:27,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:52:27,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454737082] [2022-02-16 13:52:27,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:27,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:52:27,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:27,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:52:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:52:27,381 INFO L87 Difference]: Start difference. First operand 1288 states and 3679 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:28,501 INFO L93 Difference]: Finished difference Result 1567 states and 4309 transitions. [2022-02-16 13:52:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 13:52:28,502 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:52:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:28,504 INFO L225 Difference]: With dead ends: 1567 [2022-02-16 13:52:28,504 INFO L226 Difference]: Without dead ends: 1559 [2022-02-16 13:52:28,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=207, Invalid=1773, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 13:52:28,504 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:28,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 783 Invalid, 0 Unknown, 238 Unchecked, 0.5s Time] [2022-02-16 13:52:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-02-16 13:52:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1293. [2022-02-16 13:52:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.859907120743034) internal successors, (3695), 1292 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3695 transitions. [2022-02-16 13:52:28,521 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3695 transitions. Word has length 18 [2022-02-16 13:52:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:28,521 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 3695 transitions. [2022-02-16 13:52:28,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3695 transitions. [2022-02-16 13:52:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:52:28,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:28,523 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:28,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:28,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-02-16 13:52:28,739 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:52:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash -767814659, now seen corresponding path program 387 times [2022-02-16 13:52:28,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:28,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933123487] [2022-02-16 13:52:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:28,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:29,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:29,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933123487] [2022-02-16 13:52:29,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933123487] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:29,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724078219] [2022-02-16 13:52:29,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:52:29,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:29,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:29,149 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:29,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-02-16 13:52:29,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:52:29,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:29,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 13:52:29,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:29,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:29,959 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:52:29,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 109 [2022-02-16 13:52:29,965 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:52:29,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-02-16 13:52:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:30,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:31,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:31,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:31,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:31,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:31,630 INFO L353 Elim1Store]: treesize reduction 113, result has 29.8 percent of original size [2022-02-16 13:52:31,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 262 treesize of output 249 [2022-02-16 13:52:31,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:31,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 196 treesize of output 188 [2022-02-16 13:52:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:32,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724078219] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:32,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:32,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-02-16 13:52:32,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749075309] [2022-02-16 13:52:32,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:32,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 13:52:32,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:32,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 13:52:32,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:52:32,202 INFO L87 Difference]: Start difference. First operand 1293 states and 3695 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:41,524 INFO L93 Difference]: Finished difference Result 3275 states and 9375 transitions. [2022-02-16 13:52:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-16 13:52:41,524 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:52:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:41,529 INFO L225 Difference]: With dead ends: 3275 [2022-02-16 13:52:41,529 INFO L226 Difference]: Without dead ends: 3266 [2022-02-16 13:52:41,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=534, Invalid=4436, Unknown=0, NotChecked=0, Total=4970 [2022-02-16 13:52:41,530 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 147 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:41,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 45 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 852 Invalid, 0 Unknown, 229 Unchecked, 0.7s Time] [2022-02-16 13:52:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2022-02-16 13:52:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 1307. [2022-02-16 13:52:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 2.862940275650842) internal successors, (3739), 1306 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 3739 transitions. [2022-02-16 13:52:41,555 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 3739 transitions. Word has length 18 [2022-02-16 13:52:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:41,555 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 3739 transitions. [2022-02-16 13:52:41,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 3739 transitions. [2022-02-16 13:52:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:52:41,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:41,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:41,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:41,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-02-16 13:52:41,771 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:52:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:41,772 INFO L85 PathProgramCache]: Analyzing trace with hash 334646367, now seen corresponding path program 388 times [2022-02-16 13:52:41,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:41,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681553346] [2022-02-16 13:52:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:41,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:42,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:42,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681553346] [2022-02-16 13:52:42,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681553346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:42,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693107477] [2022-02-16 13:52:42,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:52:42,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:42,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:42,387 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:42,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-02-16 13:52:42,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:52:42,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:42,413 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 56 conjunts are in the unsatisfiable core [2022-02-16 13:52:42,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:43,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:43,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:43,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:43,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:43,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:43,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:43,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:43,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:43,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:43,485 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:52:43,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:52:43,491 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:52:43,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:52:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:43,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:45,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,796 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-16 13:52:45,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 396 treesize of output 372 [2022-02-16 13:52:45,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:45,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:45,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 340 treesize of output 414 [2022-02-16 13:52:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:47,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693107477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:47,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:47,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-16 13:52:47,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272960712] [2022-02-16 13:52:47,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:47,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:52:47,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:47,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:52:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:52:47,037 INFO L87 Difference]: Start difference. First operand 1307 states and 3739 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:49,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:49,287 INFO L93 Difference]: Finished difference Result 1588 states and 4351 transitions. [2022-02-16 13:52:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:52:49,287 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:52:49,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:49,289 INFO L225 Difference]: With dead ends: 1588 [2022-02-16 13:52:49,289 INFO L226 Difference]: Without dead ends: 1582 [2022-02-16 13:52:49,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=206, Invalid=2244, Unknown=0, NotChecked=0, Total=2450 [2022-02-16 13:52:49,289 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 51 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:49,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1301 Invalid, 0 Unknown, 242 Unchecked, 0.9s Time] [2022-02-16 13:52:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-02-16 13:52:49,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1307. [2022-02-16 13:52:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 2.860643185298622) internal successors, (3736), 1306 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 3736 transitions. [2022-02-16 13:52:49,303 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 3736 transitions. Word has length 18 [2022-02-16 13:52:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:49,303 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 3736 transitions. [2022-02-16 13:52:49,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:49,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 3736 transitions. [2022-02-16 13:52:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:52:49,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:49,304 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:49,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:49,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2022-02-16 13:52:49,517 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:52:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash 727673377, now seen corresponding path program 389 times [2022-02-16 13:52:49,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:49,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764266188] [2022-02-16 13:52:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:49,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:49,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:49,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764266188] [2022-02-16 13:52:49,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764266188] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:49,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628597726] [2022-02-16 13:52:49,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:49,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:49,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:49,598 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:49,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-02-16 13:52:49,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:52:49,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:49,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 13:52:49,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:49,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:49,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-16 13:52:49,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:49,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-16 13:52:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:49,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:49,934 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-16 13:52:49,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-16 13:52:49,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-02-16 13:52:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:49,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628597726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:49,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:49,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-02-16 13:52:49,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812452676] [2022-02-16 13:52:49,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:49,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:52:49,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:52:49,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:52:49,945 INFO L87 Difference]: Start difference. First operand 1307 states and 3736 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:50,297 INFO L93 Difference]: Finished difference Result 1568 states and 4341 transitions. [2022-02-16 13:52:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:52:50,298 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:52:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:50,299 INFO L225 Difference]: With dead ends: 1568 [2022-02-16 13:52:50,300 INFO L226 Difference]: Without dead ends: 1568 [2022-02-16 13:52:50,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 13:52:50,300 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:50,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 60 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 410 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-02-16 13:52:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2022-02-16 13:52:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1305. [2022-02-16 13:52:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 2.8604294478527605) internal successors, (3730), 1304 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 3730 transitions. [2022-02-16 13:52:50,313 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 3730 transitions. Word has length 18 [2022-02-16 13:52:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:50,313 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 3730 transitions. [2022-02-16 13:52:50,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 3730 transitions. [2022-02-16 13:52:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:52:50,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:50,315 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:50,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:50,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2022-02-16 13:52:50,530 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:52:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash -349154849, now seen corresponding path program 390 times [2022-02-16 13:52:50,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:50,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442296736] [2022-02-16 13:52:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:50,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:50,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:50,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442296736] [2022-02-16 13:52:50,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442296736] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:50,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668181907] [2022-02-16 13:52:50,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:50,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:50,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:50,765 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:50,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-02-16 13:52:50,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:52:50,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:50,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:52:50,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:51,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:51,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:51,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:51,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:51,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:51,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:51,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-02-16 13:52:51,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:51,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:52:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:51,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:53,049 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:52:53,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 255 treesize of output 255 [2022-02-16 13:52:53,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:53,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:53,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:53,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:53,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:53,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:53,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:53,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 223 treesize of output 321 [2022-02-16 13:52:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:53,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668181907] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:53,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:53,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-16 13:52:53,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19592945] [2022-02-16 13:52:53,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:53,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 13:52:53,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 13:52:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:52:53,712 INFO L87 Difference]: Start difference. First operand 1305 states and 3730 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:58,035 INFO L93 Difference]: Finished difference Result 1520 states and 4167 transitions. [2022-02-16 13:52:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 13:52:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:52:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:58,037 INFO L225 Difference]: With dead ends: 1520 [2022-02-16 13:52:58,037 INFO L226 Difference]: Without dead ends: 1511 [2022-02-16 13:52:58,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=391, Invalid=3641, Unknown=0, NotChecked=0, Total=4032 [2022-02-16 13:52:58,037 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 98 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:58,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 96 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-16 13:52:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2022-02-16 13:52:58,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1317. [2022-02-16 13:52:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 2.878419452887538) internal successors, (3788), 1316 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 3788 transitions. [2022-02-16 13:52:58,051 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 3788 transitions. Word has length 18 [2022-02-16 13:52:58,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:58,051 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 3788 transitions. [2022-02-16 13:52:58,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 3788 transitions. [2022-02-16 13:52:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:52:58,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:58,053 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:58,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:58,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:58,267 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:52:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash -101782113, now seen corresponding path program 391 times [2022-02-16 13:52:58,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:58,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999800832] [2022-02-16 13:52:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:58,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:58,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:58,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999800832] [2022-02-16 13:52:58,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999800832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:58,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514750184] [2022-02-16 13:52:58,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:52:58,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:58,461 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:58,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-02-16 13:52:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:58,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:52:58,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:59,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:52:59,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 77 [2022-02-16 13:52:59,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:59,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:52:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:59,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:00,310 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:53:00,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:53:00,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:00,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:00,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:00,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:00,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:00,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:00,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:00,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:53:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:01,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514750184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:01,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:01,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-02-16 13:53:01,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492759173] [2022-02-16 13:53:01,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:01,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 13:53:01,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 13:53:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:53:01,003 INFO L87 Difference]: Start difference. First operand 1317 states and 3788 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:02,289 INFO L93 Difference]: Finished difference Result 1421 states and 4008 transitions. [2022-02-16 13:53:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:53:02,289 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:53:02,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:02,291 INFO L225 Difference]: With dead ends: 1421 [2022-02-16 13:53:02,291 INFO L226 Difference]: Without dead ends: 1418 [2022-02-16 13:53:02,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2022-02-16 13:53:02,292 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:02,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 784 Invalid, 0 Unknown, 9 Unchecked, 0.5s Time] [2022-02-16 13:53:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-02-16 13:53:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1316. [2022-02-16 13:53:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 2.8775665399239543) internal successors, (3784), 1315 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 3784 transitions. [2022-02-16 13:53:02,305 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 3784 transitions. Word has length 18 [2022-02-16 13:53:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:02,305 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 3784 transitions. [2022-02-16 13:53:02,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 3784 transitions. [2022-02-16 13:53:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:53:02,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:02,307 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:02,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Ended with exit code 0 [2022-02-16 13:53:02,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:02,518 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:53:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1505739073, now seen corresponding path program 392 times [2022-02-16 13:53:02,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:02,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454194606] [2022-02-16 13:53:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:02,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:02,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:02,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454194606] [2022-02-16 13:53:02,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454194606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:02,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876031576] [2022-02-16 13:53:02,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:53:02,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:02,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:02,975 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:02,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-02-16 13:53:03,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:03,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:03,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 13:53:03,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:04,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:04,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:04,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:04,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:04,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:04,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:04,141 INFO L353 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-02-16 13:53:04,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 84 [2022-02-16 13:53:04,148 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:04,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:53:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:04,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:06,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,119 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-16 13:53:06,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 294 treesize of output 294 [2022-02-16 13:53:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:06,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:06,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 262 treesize of output 360 [2022-02-16 13:53:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:06,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876031576] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:06,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:06,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-16 13:53:06,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609462457] [2022-02-16 13:53:06,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:06,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:53:06,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:06,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:53:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:53:06,916 INFO L87 Difference]: Start difference. First operand 1316 states and 3784 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:23,778 INFO L93 Difference]: Finished difference Result 1572 states and 4228 transitions. [2022-02-16 13:53:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-16 13:53:23,778 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:53:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:23,780 INFO L225 Difference]: With dead ends: 1572 [2022-02-16 13:53:23,780 INFO L226 Difference]: Without dead ends: 1566 [2022-02-16 13:53:23,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=731, Invalid=5749, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 13:53:23,781 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 221 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:23,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 87 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1545 Invalid, 0 Unknown, 110 Unchecked, 1.3s Time] [2022-02-16 13:53:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-02-16 13:53:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1339. [2022-02-16 13:53:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 2.881913303437967) internal successors, (3856), 1338 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3856 transitions. [2022-02-16 13:53:23,796 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3856 transitions. Word has length 18 [2022-02-16 13:53:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:23,796 INFO L470 AbstractCegarLoop]: Abstraction has 1339 states and 3856 transitions. [2022-02-16 13:53:23,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3856 transitions. [2022-02-16 13:53:23,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:53:23,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:23,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:23,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:24,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2022-02-16 13:53:24,003 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:53:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -518101729, now seen corresponding path program 393 times [2022-02-16 13:53:24,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:24,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076732807] [2022-02-16 13:53:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:24,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:24,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:24,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076732807] [2022-02-16 13:53:24,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076732807] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:24,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474321189] [2022-02-16 13:53:24,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:53:24,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:24,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:24,226 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:24,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-02-16 13:53:24,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:53:24,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:24,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:53:24,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:24,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:24,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:24,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:24,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:24,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:24,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:24,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:24,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:24,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:24,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:24,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:53:24,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:24,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:53:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:25,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:26,336 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:53:26,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:53:26,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:26,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:26,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:26,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:26,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:26,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:26,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:26,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:53:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:27,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474321189] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:27,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:27,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-02-16 13:53:27,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044600291] [2022-02-16 13:53:27,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:27,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 13:53:27,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 13:53:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:53:27,246 INFO L87 Difference]: Start difference. First operand 1339 states and 3856 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:28,309 INFO L93 Difference]: Finished difference Result 1505 states and 4264 transitions. [2022-02-16 13:53:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:53:28,309 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:53:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:28,311 INFO L225 Difference]: With dead ends: 1505 [2022-02-16 13:53:28,311 INFO L226 Difference]: Without dead ends: 1495 [2022-02-16 13:53:28,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:53:28,311 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:28,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 503 Invalid, 0 Unknown, 20 Unchecked, 0.4s Time] [2022-02-16 13:53:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2022-02-16 13:53:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1387. [2022-02-16 13:53:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1386 states have (on average 2.8838383838383836) internal successors, (3997), 1386 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 3997 transitions. [2022-02-16 13:53:28,325 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 3997 transitions. Word has length 18 [2022-02-16 13:53:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:28,325 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 3997 transitions. [2022-02-16 13:53:28,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 3997 transitions. [2022-02-16 13:53:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:53:28,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:28,327 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:28,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:28,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:28,536 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:53:28,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:28,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1089419457, now seen corresponding path program 394 times [2022-02-16 13:53:28,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:28,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156359411] [2022-02-16 13:53:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:28,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:28,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:28,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156359411] [2022-02-16 13:53:28,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156359411] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:28,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921740868] [2022-02-16 13:53:28,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:53:28,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:28,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:28,791 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:28,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-02-16 13:53:28,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:53:28,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:28,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:53:28,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:29,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:29,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:29,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:29,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:29,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:29,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:29,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:29,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:29,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:53:29,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:29,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:53:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:29,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:30,988 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:53:30,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:53:30,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:30,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:30,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:30,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:30,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:30,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:31,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:31,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:53:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:31,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921740868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:31,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:31,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-16 13:53:31,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054915595] [2022-02-16 13:53:31,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:31,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 13:53:31,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 13:53:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:53:31,746 INFO L87 Difference]: Start difference. First operand 1387 states and 3997 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:33,827 INFO L93 Difference]: Finished difference Result 1549 states and 4281 transitions. [2022-02-16 13:53:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:53:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:53:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:33,829 INFO L225 Difference]: With dead ends: 1549 [2022-02-16 13:53:33,830 INFO L226 Difference]: Without dead ends: 1529 [2022-02-16 13:53:33,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 13:53:33,830 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 78 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:33,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 64 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 743 Invalid, 0 Unknown, 102 Unchecked, 0.5s Time] [2022-02-16 13:53:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-02-16 13:53:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1370. [2022-02-16 13:53:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 2.879474068663258) internal successors, (3942), 1369 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 3942 transitions. [2022-02-16 13:53:33,844 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 3942 transitions. Word has length 18 [2022-02-16 13:53:33,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:33,844 INFO L470 AbstractCegarLoop]: Abstraction has 1370 states and 3942 transitions. [2022-02-16 13:53:33,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 3942 transitions. [2022-02-16 13:53:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:53:33,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:33,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:33,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-02-16 13:53:34,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2022-02-16 13:53:34,062 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:53:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:34,062 INFO L85 PathProgramCache]: Analyzing trace with hash -539107937, now seen corresponding path program 395 times [2022-02-16 13:53:34,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:34,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742400070] [2022-02-16 13:53:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:34,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:34,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:34,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742400070] [2022-02-16 13:53:34,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742400070] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:34,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571014269] [2022-02-16 13:53:34,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:53:34,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:34,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:34,327 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:34,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-02-16 13:53:34,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:53:34,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:34,354 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:53:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:35,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:35,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:35,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:35,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:35,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:35,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:35,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:35,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:35,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:35,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:35,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:53:35,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:35,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:53:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:35,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:36,637 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:53:36,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:53:36,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:36,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:36,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:36,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:36,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:36,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:36,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:36,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:53:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:37,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571014269] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:37,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:37,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-16 13:53:37,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585207898] [2022-02-16 13:53:37,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:37,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 13:53:37,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:37,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 13:53:37,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:53:37,535 INFO L87 Difference]: Start difference. First operand 1370 states and 3942 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:38,483 INFO L93 Difference]: Finished difference Result 1499 states and 4245 transitions. [2022-02-16 13:53:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:53:38,483 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:53:38,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:38,485 INFO L225 Difference]: With dead ends: 1499 [2022-02-16 13:53:38,485 INFO L226 Difference]: Without dead ends: 1491 [2022-02-16 13:53:38,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=203, Invalid=1603, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:53:38,486 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:38,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 18 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 620 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-02-16 13:53:38,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-02-16 13:53:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1386. [2022-02-16 13:53:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.8815884476534297) internal successors, (3991), 1385 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 3991 transitions. [2022-02-16 13:53:38,499 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 3991 transitions. Word has length 18 [2022-02-16 13:53:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:38,499 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 3991 transitions. [2022-02-16 13:53:38,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 3991 transitions. [2022-02-16 13:53:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:53:38,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:38,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:38,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:38,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:38,711 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:53:38,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:38,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1068413249, now seen corresponding path program 396 times [2022-02-16 13:53:38,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:38,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276237492] [2022-02-16 13:53:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:38,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:39,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:39,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276237492] [2022-02-16 13:53:39,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276237492] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:39,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415630277] [2022-02-16 13:53:39,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:53:39,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:39,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:39,026 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:39,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-02-16 13:53:39,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:53:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:39,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 13:53:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:39,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:39,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:39,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:53:39,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:39,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 81 [2022-02-16 13:53:39,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:39,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:53:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:39,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:41,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,217 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-16 13:53:41,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 270 treesize of output 270 [2022-02-16 13:53:41,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:41,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:41,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 336 [2022-02-16 13:53:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:42,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415630277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:42,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:42,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-16 13:53:42,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127387858] [2022-02-16 13:53:42,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:42,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:53:42,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:42,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:53:42,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:53:42,944 INFO L87 Difference]: Start difference. First operand 1386 states and 3991 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:02,491 INFO L93 Difference]: Finished difference Result 1686 states and 4483 transitions. [2022-02-16 13:54:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-16 13:54:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:54:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:02,493 INFO L225 Difference]: With dead ends: 1686 [2022-02-16 13:54:02,493 INFO L226 Difference]: Without dead ends: 1674 [2022-02-16 13:54:02,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=1032, Invalid=7524, Unknown=0, NotChecked=0, Total=8556 [2022-02-16 13:54:02,494 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 287 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:02,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 63 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1220 Invalid, 0 Unknown, 27 Unchecked, 1.0s Time] [2022-02-16 13:54:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-02-16 13:54:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1404. [2022-02-16 13:54:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.8902352102637208) internal successors, (4055), 1403 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4055 transitions. [2022-02-16 13:54:02,509 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4055 transitions. Word has length 18 [2022-02-16 13:54:02,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:02,509 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4055 transitions. [2022-02-16 13:54:02,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4055 transitions. [2022-02-16 13:54:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:54:02,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:02,510 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:02,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Ended with exit code 0 [2022-02-16 13:54:02,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:02,719 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:54:02,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:02,719 INFO L85 PathProgramCache]: Analyzing trace with hash 312380421, now seen corresponding path program 397 times [2022-02-16 13:54:02,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:02,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811416254] [2022-02-16 13:54:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:02,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:02,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:02,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811416254] [2022-02-16 13:54:02,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811416254] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:02,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100292265] [2022-02-16 13:54:02,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:54:02,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:02,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:02,973 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:02,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-02-16 13:54:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:03,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:54:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:03,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:03,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:03,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:03,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:03,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:03,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 79 [2022-02-16 13:54:03,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:03,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:54:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:03,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:05,208 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:54:05,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 255 treesize of output 255 [2022-02-16 13:54:05,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:05,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:05,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:05,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:05,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:05,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:05,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:05,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 223 treesize of output 321 [2022-02-16 13:54:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:06,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100292265] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:06,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:06,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-16 13:54:06,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024663043] [2022-02-16 13:54:06,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:06,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 13:54:06,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:06,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 13:54:06,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:54:06,105 INFO L87 Difference]: Start difference. First operand 1404 states and 4055 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:08,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:08,289 INFO L93 Difference]: Finished difference Result 1575 states and 4422 transitions. [2022-02-16 13:54:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-16 13:54:08,307 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:54:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:08,310 INFO L225 Difference]: With dead ends: 1575 [2022-02-16 13:54:08,310 INFO L226 Difference]: Without dead ends: 1572 [2022-02-16 13:54:08,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=234, Invalid=2118, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:54:08,310 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 78 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:08,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 74 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 13:54:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2022-02-16 13:54:08,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1407. [2022-02-16 13:54:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 2.8904694167852063) internal successors, (4064), 1406 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4064 transitions. [2022-02-16 13:54:08,327 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4064 transitions. Word has length 18 [2022-02-16 13:54:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:08,327 INFO L470 AbstractCegarLoop]: Abstraction has 1407 states and 4064 transitions. [2022-02-16 13:54:08,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4064 transitions. [2022-02-16 13:54:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:54:08,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:08,329 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:08,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:08,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:08,544 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:54:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 320110819, now seen corresponding path program 398 times [2022-02-16 13:54:08,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:08,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787615144] [2022-02-16 13:54:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:08,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:09,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:09,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787615144] [2022-02-16 13:54:09,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787615144] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:09,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618425115] [2022-02-16 13:54:09,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:54:09,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:09,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:09,010 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:09,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-02-16 13:54:09,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:09,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:09,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:54:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:09,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:09,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:09,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:09,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:09,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:09,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:09,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:09,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:09,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:09,717 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:09,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:54:09,722 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:09,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:54:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:09,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:11,124 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:54:11,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 274 treesize of output 278 [2022-02-16 13:54:11,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:11,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:11,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:11,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:11,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:11,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:11,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:11,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 246 treesize of output 348 [2022-02-16 13:54:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:11,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618425115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:11,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:11,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-16 13:54:11,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145701288] [2022-02-16 13:54:11,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:11,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:54:11,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:11,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:54:11,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:54:11,858 INFO L87 Difference]: Start difference. First operand 1407 states and 4064 transitions. Second operand has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:14,343 INFO L93 Difference]: Finished difference Result 1560 states and 4377 transitions. [2022-02-16 13:54:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:54:14,343 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:54:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:14,345 INFO L225 Difference]: With dead ends: 1560 [2022-02-16 13:54:14,345 INFO L226 Difference]: Without dead ends: 1551 [2022-02-16 13:54:14,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=284, Invalid=2578, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 13:54:14,346 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:14,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 69 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1113 Invalid, 0 Unknown, 70 Unchecked, 0.7s Time] [2022-02-16 13:54:14,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2022-02-16 13:54:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1357. [2022-02-16 13:54:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.8915929203539825) internal successors, (3921), 1356 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3921 transitions. [2022-02-16 13:54:14,359 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3921 transitions. Word has length 18 [2022-02-16 13:54:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:14,359 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 3921 transitions. [2022-02-16 13:54:14,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3921 transitions. [2022-02-16 13:54:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:54:14,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:14,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:14,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:14,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2022-02-16 13:54:14,571 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:54:14,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:14,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1927632005, now seen corresponding path program 399 times [2022-02-16 13:54:14,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:14,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714011353] [2022-02-16 13:54:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:14,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:14,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:14,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714011353] [2022-02-16 13:54:14,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714011353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:14,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805672880] [2022-02-16 13:54:14,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:54:14,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:14,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:14,947 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:14,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-02-16 13:54:14,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:54:14,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:14,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:54:14,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:15,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:15,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:15,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:15,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:15,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:15,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:15,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:15,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:15,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:15,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:15,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:54:15,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:15,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:54:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:15,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:17,395 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:54:17,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:54:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:17,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:17,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:17,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:17,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:17,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:17,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:54:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:18,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805672880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:18,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:18,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:54:18,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022093605] [2022-02-16 13:54:18,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:18,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:54:18,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:18,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:54:18,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:54:18,459 INFO L87 Difference]: Start difference. First operand 1357 states and 3921 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:19,959 INFO L93 Difference]: Finished difference Result 1515 states and 4230 transitions. [2022-02-16 13:54:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:54:19,959 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:54:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:19,962 INFO L225 Difference]: With dead ends: 1515 [2022-02-16 13:54:19,962 INFO L226 Difference]: Without dead ends: 1507 [2022-02-16 13:54:19,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 13:54:19,962 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:19,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 61 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 866 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-02-16 13:54:19,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-02-16 13:54:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1366. [2022-02-16 13:54:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 2.8967032967032966) internal successors, (3954), 1365 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 3954 transitions. [2022-02-16 13:54:19,980 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 3954 transitions. Word has length 18 [2022-02-16 13:54:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:19,980 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 3954 transitions. [2022-02-16 13:54:19,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 3954 transitions. [2022-02-16 13:54:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:54:19,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:19,982 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:19,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-02-16 13:54:20,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2022-02-16 13:54:20,192 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:54:20,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1190300385, now seen corresponding path program 400 times [2022-02-16 13:54:20,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:20,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065700201] [2022-02-16 13:54:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:20,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:21,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:21,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065700201] [2022-02-16 13:54:21,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065700201] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:21,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12135076] [2022-02-16 13:54:21,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:54:21,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:21,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:21,259 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:21,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-02-16 13:54:21,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:54:21,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:21,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:54:21,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:21,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:21,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:21,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:21,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:21,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:21,983 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:21,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:54:21,987 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:21,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:54:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:22,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:23,379 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:54:23,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 358 treesize of output 338 [2022-02-16 13:54:23,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:23,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:23,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:23,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:23,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:23,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:23,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:23,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 306 treesize of output 384 [2022-02-16 13:54:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:24,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12135076] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:24,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:24,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-16 13:54:24,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7215532] [2022-02-16 13:54:24,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:24,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:54:24,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:24,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:54:24,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:54:24,116 INFO L87 Difference]: Start difference. First operand 1366 states and 3954 transitions. Second operand has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:25,910 INFO L93 Difference]: Finished difference Result 1466 states and 4183 transitions. [2022-02-16 13:54:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 13:54:25,910 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:54:25,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:25,912 INFO L225 Difference]: With dead ends: 1466 [2022-02-16 13:54:25,913 INFO L226 Difference]: Without dead ends: 1460 [2022-02-16 13:54:25,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=163, Invalid=1907, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 13:54:25,913 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:25,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 24 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 837 Invalid, 0 Unknown, 148 Unchecked, 0.6s Time] [2022-02-16 13:54:25,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-02-16 13:54:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1369. [2022-02-16 13:54:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 2.8969298245614037) internal successors, (3963), 1368 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 3963 transitions. [2022-02-16 13:54:25,929 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 3963 transitions. Word has length 18 [2022-02-16 13:54:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:25,929 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 3963 transitions. [2022-02-16 13:54:25,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 3963 transitions. [2022-02-16 13:54:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:54:25,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:25,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:25,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:26,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:26,143 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:54:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2146268135, now seen corresponding path program 401 times [2022-02-16 13:54:26,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:26,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309625458] [2022-02-16 13:54:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:26,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:26,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:26,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309625458] [2022-02-16 13:54:26,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309625458] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:26,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682630159] [2022-02-16 13:54:26,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:54:26,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:26,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:26,753 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:26,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-02-16 13:54:26,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:54:26,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:26,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:54:26,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:27,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:27,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:27,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:27,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:27,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:27,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:27,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:54:27,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:27,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:54:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:27,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:29,150 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:54:29,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:54:29,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:29,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:29,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:29,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:29,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:29,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:29,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:29,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:54:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:29,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682630159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:29,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:29,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-02-16 13:54:29,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515545810] [2022-02-16 13:54:29,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:29,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:54:29,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:29,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:54:29,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:54:29,965 INFO L87 Difference]: Start difference. First operand 1369 states and 3963 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:32,605 INFO L93 Difference]: Finished difference Result 1507 states and 4249 transitions. [2022-02-16 13:54:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:54:32,605 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:54:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:32,608 INFO L225 Difference]: With dead ends: 1507 [2022-02-16 13:54:32,608 INFO L226 Difference]: Without dead ends: 1501 [2022-02-16 13:54:32,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=224, Invalid=2638, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 13:54:32,608 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:32,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 45 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 872 Invalid, 0 Unknown, 228 Unchecked, 0.6s Time] [2022-02-16 13:54:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-02-16 13:54:32,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1377. [2022-02-16 13:54:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 2.897529069767442) internal successors, (3987), 1376 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3987 transitions. [2022-02-16 13:54:32,622 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3987 transitions. Word has length 18 [2022-02-16 13:54:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:32,622 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 3987 transitions. [2022-02-16 13:54:32,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3987 transitions. [2022-02-16 13:54:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:54:32,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:32,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:32,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:32,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2022-02-16 13:54:32,840 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:54:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash -625694937, now seen corresponding path program 402 times [2022-02-16 13:54:32,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:32,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080601817] [2022-02-16 13:54:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:32,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:33,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:33,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080601817] [2022-02-16 13:54:33,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080601817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:33,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25054451] [2022-02-16 13:54:33,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:54:33,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:33,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:33,362 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:33,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-02-16 13:54:33,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:54:33,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:33,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:54:33,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:34,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:34,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:34,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:34,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:34,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:34,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:34,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:34,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:34,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:34,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:34,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:54:34,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:34,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:54:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:34,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:35,761 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:54:35,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:54:35,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:35,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:35,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:35,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:35,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:35,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:35,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:35,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:54:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:36,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25054451] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:36,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:36,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-02-16 13:54:36,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795592988] [2022-02-16 13:54:36,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:36,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:54:36,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:54:36,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:54:36,496 INFO L87 Difference]: Start difference. First operand 1377 states and 3987 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:37,621 INFO L93 Difference]: Finished difference Result 1481 states and 4206 transitions. [2022-02-16 13:54:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-16 13:54:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:54:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:37,623 INFO L225 Difference]: With dead ends: 1481 [2022-02-16 13:54:37,623 INFO L226 Difference]: Without dead ends: 1475 [2022-02-16 13:54:37,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2022-02-16 13:54:37,624 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:37,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 25 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 713 Invalid, 0 Unknown, 279 Unchecked, 0.4s Time] [2022-02-16 13:54:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2022-02-16 13:54:37,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1377. [2022-02-16 13:54:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 2.897529069767442) internal successors, (3987), 1376 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3987 transitions. [2022-02-16 13:54:37,638 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3987 transitions. Word has length 18 [2022-02-16 13:54:37,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:37,638 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 3987 transitions. [2022-02-16 13:54:37,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:37,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3987 transitions. [2022-02-16 13:54:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:54:37,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:37,640 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:37,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Ended with exit code 0 [2022-02-16 13:54:37,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:37,843 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:54:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash 405932643, now seen corresponding path program 403 times [2022-02-16 13:54:37,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:37,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836759415] [2022-02-16 13:54:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:37,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:38,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:38,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836759415] [2022-02-16 13:54:38,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836759415] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:38,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731247823] [2022-02-16 13:54:38,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:54:38,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:38,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:38,278 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:38,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-02-16 13:54:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:38,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:54:38,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:38,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:38,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 75 [2022-02-16 13:54:38,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:38,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:54:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:38,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:40,018 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:54:40,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 269 treesize of output 269 [2022-02-16 13:54:40,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:40,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:40,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:40,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:40,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:40,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:40,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:40,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 237 treesize of output 335 [2022-02-16 13:54:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:40,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731247823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:40,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:40,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-16 13:54:40,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601416111] [2022-02-16 13:54:40,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:40,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 13:54:40,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:40,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 13:54:40,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:54:40,949 INFO L87 Difference]: Start difference. First operand 1377 states and 3987 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:47,397 INFO L93 Difference]: Finished difference Result 1664 states and 4575 transitions. [2022-02-16 13:54:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-16 13:54:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:54:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:47,399 INFO L225 Difference]: With dead ends: 1664 [2022-02-16 13:54:47,399 INFO L226 Difference]: Without dead ends: 1647 [2022-02-16 13:54:47,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 13:54:47,400 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:47,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 97 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-16 13:54:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2022-02-16 13:54:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1461. [2022-02-16 13:54:47,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 2.8958904109589043) internal successors, (4228), 1460 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4228 transitions. [2022-02-16 13:54:47,415 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4228 transitions. Word has length 18 [2022-02-16 13:54:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:47,415 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 4228 transitions. [2022-02-16 13:54:47,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4228 transitions. [2022-02-16 13:54:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:54:47,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:47,417 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:47,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:47,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:47,632 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:54:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash -507716735, now seen corresponding path program 404 times [2022-02-16 13:54:47,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:47,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706347756] [2022-02-16 13:54:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:47,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:47,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:47,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706347756] [2022-02-16 13:54:47,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706347756] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:47,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877281879] [2022-02-16 13:54:47,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:54:47,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:47,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:47,788 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:47,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-02-16 13:54:47,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:47,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:47,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 13:54:47,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:48,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:48,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:48,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:48,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:48,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:54:48,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 98 [2022-02-16 13:54:48,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:48,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:54:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:48,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:49,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:49,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:49,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:49,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:49,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:49,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:50,017 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-16 13:54:50,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 270 treesize of output 270 [2022-02-16 13:54:50,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:50,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:50,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:50,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:50,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:50,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:54:50,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:50,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 336 [2022-02-16 13:54:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:51,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877281879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:51,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:51,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-02-16 13:54:51,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257987259] [2022-02-16 13:54:51,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:51,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 13:54:51,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 13:54:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:54:51,485 INFO L87 Difference]: Start difference. First operand 1461 states and 4228 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:05,575 INFO L93 Difference]: Finished difference Result 1731 states and 4716 transitions. [2022-02-16 13:55:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-16 13:55:05,576 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:55:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:05,578 INFO L225 Difference]: With dead ends: 1731 [2022-02-16 13:55:05,578 INFO L226 Difference]: Without dead ends: 1718 [2022-02-16 13:55:05,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2235 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=834, Invalid=6648, Unknown=0, NotChecked=0, Total=7482 [2022-02-16 13:55:05,579 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 218 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:05,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 109 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1526 Invalid, 0 Unknown, 17 Unchecked, 1.1s Time] [2022-02-16 13:55:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-02-16 13:55:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1361. [2022-02-16 13:55:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 2.8904411764705884) internal successors, (3931), 1360 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 3931 transitions. [2022-02-16 13:55:05,596 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 3931 transitions. Word has length 18 [2022-02-16 13:55:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:05,596 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 3931 transitions. [2022-02-16 13:55:05,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:05,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 3931 transitions. [2022-02-16 13:55:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:55:05,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:05,598 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:05,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:05,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2022-02-16 13:55:05,811 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:55:05,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2018127939, now seen corresponding path program 405 times [2022-02-16 13:55:05,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:05,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141065630] [2022-02-16 13:55:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:05,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:06,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:06,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141065630] [2022-02-16 13:55:06,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141065630] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:06,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312141898] [2022-02-16 13:55:06,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:55:06,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:06,055 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:06,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-02-16 13:55:06,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:55:06,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:06,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 13:55:06,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:06,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:06,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:06,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:06,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:06,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:06,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:06,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:06,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:06,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:06,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:06,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 100 [2022-02-16 13:55:06,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:06,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-16 13:55:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:06,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:08,243 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:55:08,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 262 treesize of output 264 [2022-02-16 13:55:08,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:08,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:08,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:08,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:08,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:08,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:08,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:08,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 232 treesize of output 332 [2022-02-16 13:55:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:09,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312141898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:09,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:09,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-02-16 13:55:09,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023001900] [2022-02-16 13:55:09,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:09,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:55:09,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:09,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:55:09,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:55:09,834 INFO L87 Difference]: Start difference. First operand 1361 states and 3931 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:17,444 INFO L93 Difference]: Finished difference Result 1536 states and 4322 transitions. [2022-02-16 13:55:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-16 13:55:17,444 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:55:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:17,446 INFO L225 Difference]: With dead ends: 1536 [2022-02-16 13:55:17,446 INFO L226 Difference]: Without dead ends: 1525 [2022-02-16 13:55:17,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=442, Invalid=3590, Unknown=0, NotChecked=0, Total=4032 [2022-02-16 13:55:17,446 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 76 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:17,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 42 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 947 Invalid, 0 Unknown, 161 Unchecked, 0.7s Time] [2022-02-16 13:55:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-02-16 13:55:17,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1407. [2022-02-16 13:55:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 2.9046941678520626) internal successors, (4084), 1406 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4084 transitions. [2022-02-16 13:55:17,461 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4084 transitions. Word has length 18 [2022-02-16 13:55:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:17,461 INFO L470 AbstractCegarLoop]: Abstraction has 1407 states and 4084 transitions. [2022-02-16 13:55:17,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4084 transitions. [2022-02-16 13:55:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:55:17,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:17,462 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:17,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:17,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2022-02-16 13:55:17,672 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:55:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash -410606753, now seen corresponding path program 406 times [2022-02-16 13:55:17,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:17,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38110199] [2022-02-16 13:55:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:17,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:17,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:17,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38110199] [2022-02-16 13:55:17,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38110199] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:17,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097409640] [2022-02-16 13:55:17,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:55:17,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:17,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:17,992 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:17,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-02-16 13:55:18,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:55:18,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:18,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:55:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:18,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:18,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:18,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:18,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:18,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 77 [2022-02-16 13:55:18,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:18,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:55:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:18,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:20,223 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:55:20,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:55:20,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:20,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:20,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:20,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:20,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:20,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:20,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:20,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:55:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:20,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097409640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:20,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:20,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:55:20,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51103484] [2022-02-16 13:55:20,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:20,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:55:20,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:55:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:55:20,765 INFO L87 Difference]: Start difference. First operand 1407 states and 4084 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:23,000 INFO L93 Difference]: Finished difference Result 1534 states and 4313 transitions. [2022-02-16 13:55:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:55:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:55:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:23,002 INFO L225 Difference]: With dead ends: 1534 [2022-02-16 13:55:23,002 INFO L226 Difference]: Without dead ends: 1525 [2022-02-16 13:55:23,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 13:55:23,002 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 67 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:23,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 59 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 827 Invalid, 0 Unknown, 141 Unchecked, 0.5s Time] [2022-02-16 13:55:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-02-16 13:55:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1400. [2022-02-16 13:55:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 2.9013581129378125) internal successors, (4059), 1399 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4059 transitions. [2022-02-16 13:55:23,017 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4059 transitions. Word has length 18 [2022-02-16 13:55:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:23,017 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4059 transitions. [2022-02-16 13:55:23,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4059 transitions. [2022-02-16 13:55:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:55:23,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:23,019 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:23,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:23,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:23,235 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:55:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:23,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1318440581, now seen corresponding path program 407 times [2022-02-16 13:55:23,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:23,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967794601] [2022-02-16 13:55:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:23,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:23,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:23,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967794601] [2022-02-16 13:55:23,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967794601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:23,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417470177] [2022-02-16 13:55:23,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:55:23,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:23,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:23,572 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:23,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-02-16 13:55:23,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:55:23,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:23,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:55:23,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:24,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:24,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:24,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:24,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:24,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:24,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:24,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:24,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:24,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 77 [2022-02-16 13:55:24,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:24,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:55:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:24,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:25,709 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:55:25,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:55:25,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:25,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:25,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:25,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:25,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:25,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:25,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:25,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:55:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:26,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417470177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:26,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:26,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:55:26,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081896211] [2022-02-16 13:55:26,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:26,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:55:26,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:26,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:55:26,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:55:26,258 INFO L87 Difference]: Start difference. First operand 1400 states and 4059 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:27,934 INFO L93 Difference]: Finished difference Result 1548 states and 4357 transitions. [2022-02-16 13:55:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:55:27,934 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:55:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:27,937 INFO L225 Difference]: With dead ends: 1548 [2022-02-16 13:55:27,937 INFO L226 Difference]: Without dead ends: 1539 [2022-02-16 13:55:27,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=293, Invalid=2157, Unknown=0, NotChecked=0, Total=2450 [2022-02-16 13:55:27,937 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:27,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 53 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 654 Invalid, 0 Unknown, 102 Unchecked, 0.4s Time] [2022-02-16 13:55:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2022-02-16 13:55:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1418. [2022-02-16 13:55:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 2.8969654199012) internal successors, (4105), 1417 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4105 transitions. [2022-02-16 13:55:27,957 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4105 transitions. Word has length 18 [2022-02-16 13:55:27,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:27,957 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 4105 transitions. [2022-02-16 13:55:27,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4105 transitions. [2022-02-16 13:55:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:55:27,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:27,959 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:27,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:28,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2022-02-16 13:55:28,179 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:55:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1596235007, now seen corresponding path program 408 times [2022-02-16 13:55:28,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:28,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123476620] [2022-02-16 13:55:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:28,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:28,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:28,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123476620] [2022-02-16 13:55:28,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123476620] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:28,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047633693] [2022-02-16 13:55:28,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:55:28,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:28,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:28,483 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:28,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-02-16 13:55:28,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:55:28,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:28,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 13:55:28,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:29,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:29,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:29,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:29,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:29,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:29,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:29,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:29,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:29,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 102 [2022-02-16 13:55:29,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:29,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-02-16 13:55:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:29,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:31,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,433 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-16 13:55:31,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 270 treesize of output 270 [2022-02-16 13:55:31,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:31,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:31,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 336 [2022-02-16 13:55:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:33,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047633693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:33,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:33,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-02-16 13:55:33,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312672987] [2022-02-16 13:55:33,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:33,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:55:33,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:55:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:55:33,469 INFO L87 Difference]: Start difference. First operand 1418 states and 4105 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:57,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:57,263 INFO L93 Difference]: Finished difference Result 1861 states and 4989 transitions. [2022-02-16 13:55:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-16 13:55:57,263 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:55:57,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:57,266 INFO L225 Difference]: With dead ends: 1861 [2022-02-16 13:55:57,266 INFO L226 Difference]: Without dead ends: 1839 [2022-02-16 13:55:57,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=1248, Invalid=10308, Unknown=0, NotChecked=0, Total=11556 [2022-02-16 13:55:57,267 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 297 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:57,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 106 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1679 Invalid, 0 Unknown, 27 Unchecked, 1.4s Time] [2022-02-16 13:55:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-02-16 13:55:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1497. [2022-02-16 13:55:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.928475935828877) internal successors, (4381), 1496 states have internal predecessors, (4381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 4381 transitions. [2022-02-16 13:55:57,284 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 4381 transitions. Word has length 18 [2022-02-16 13:55:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:57,284 INFO L470 AbstractCegarLoop]: Abstraction has 1497 states and 4381 transitions. [2022-02-16 13:55:57,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 4381 transitions. [2022-02-16 13:55:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:55:57,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:57,285 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:57,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-02-16 13:55:57,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-02-16 13:55:57,499 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:55:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:57,500 INFO L85 PathProgramCache]: Analyzing trace with hash -561310467, now seen corresponding path program 409 times [2022-02-16 13:55:57,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:57,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780580402] [2022-02-16 13:55:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:57,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:57,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:57,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780580402] [2022-02-16 13:55:57,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780580402] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:57,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285326005] [2022-02-16 13:55:57,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:55:57,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:57,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:57,925 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:57,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-02-16 13:55:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:57,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:55:57,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:58,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:58,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:58,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:58,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:58,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:55:58,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-02-16 13:55:58,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:55:58,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:55:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:58,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:00,239 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:56:00,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 255 treesize of output 255 [2022-02-16 13:56:00,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:00,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:00,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:00,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:00,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:00,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:00,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:00,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 223 treesize of output 321 [2022-02-16 13:56:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:01,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285326005] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:01,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:01,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:56:01,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144730993] [2022-02-16 13:56:01,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:01,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:56:01,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:56:01,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:56:01,167 INFO L87 Difference]: Start difference. First operand 1497 states and 4381 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:07,557 INFO L93 Difference]: Finished difference Result 1768 states and 4922 transitions. [2022-02-16 13:56:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-16 13:56:07,557 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:56:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:07,559 INFO L225 Difference]: With dead ends: 1768 [2022-02-16 13:56:07,559 INFO L226 Difference]: Without dead ends: 1759 [2022-02-16 13:56:07,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=354, Invalid=3428, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 13:56:07,560 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 133 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:07,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 107 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1478 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-16 13:56:07,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-02-16 13:56:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1566. [2022-02-16 13:56:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.9354632587859424) internal successors, (4594), 1565 states have internal predecessors, (4594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 4594 transitions. [2022-02-16 13:56:07,577 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 4594 transitions. Word has length 18 [2022-02-16 13:56:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:07,577 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 4594 transitions. [2022-02-16 13:56:07,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 4594 transitions. [2022-02-16 13:56:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:56:07,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:07,579 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:07,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Ended with exit code 0 [2022-02-16 13:56:07,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-02-16 13:56:07,791 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:56:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:07,792 INFO L85 PathProgramCache]: Analyzing trace with hash -313937731, now seen corresponding path program 410 times [2022-02-16 13:56:07,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:07,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351410911] [2022-02-16 13:56:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:07,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:08,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:08,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351410911] [2022-02-16 13:56:08,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351410911] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:08,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723241068] [2022-02-16 13:56:08,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:56:08,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:08,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:08,104 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:08,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-02-16 13:56:08,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:08,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:08,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:56:08,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:08,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:08,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:09,000 INFO L353 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-02-16 13:56:09,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 84 [2022-02-16 13:56:09,006 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:56:09,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:56:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:09,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:10,390 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:56:10,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:56:10,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:10,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:10,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:10,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:10,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:10,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:10,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:10,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:56:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:11,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723241068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:11,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:11,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-16 13:56:11,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4785555] [2022-02-16 13:56:11,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:11,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 13:56:11,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 13:56:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:56:11,189 INFO L87 Difference]: Start difference. First operand 1566 states and 4594 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:14,496 INFO L93 Difference]: Finished difference Result 1746 states and 4933 transitions. [2022-02-16 13:56:14,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-16 13:56:14,497 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:56:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:14,499 INFO L225 Difference]: With dead ends: 1746 [2022-02-16 13:56:14,499 INFO L226 Difference]: Without dead ends: 1740 [2022-02-16 13:56:14,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=310, Invalid=2552, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 13:56:14,499 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 142 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:14,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 98 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 969 Invalid, 0 Unknown, 120 Unchecked, 0.7s Time] [2022-02-16 13:56:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-02-16 13:56:14,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1608. [2022-02-16 13:56:14,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.9471064094586183) internal successors, (4736), 1607 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4736 transitions. [2022-02-16 13:56:14,516 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4736 transitions. Word has length 18 [2022-02-16 13:56:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:14,516 INFO L470 AbstractCegarLoop]: Abstraction has 1608 states and 4736 transitions. [2022-02-16 13:56:14,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4736 transitions. [2022-02-16 13:56:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:56:14,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:14,518 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:14,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Ended with exit code 0 [2022-02-16 13:56:14,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:14,731 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:56:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:14,731 INFO L85 PathProgramCache]: Analyzing trace with hash 100224803, now seen corresponding path program 411 times [2022-02-16 13:56:14,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:14,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511434779] [2022-02-16 13:56:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:14,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:15,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:15,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511434779] [2022-02-16 13:56:15,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511434779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:15,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133360293] [2022-02-16 13:56:15,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:56:15,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:15,011 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:15,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-02-16 13:56:15,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:56:15,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:15,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:56:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:15,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:15,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:15,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:15,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:15,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:15,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 79 [2022-02-16 13:56:15,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:15,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-16 13:56:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:15,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:16,985 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:56:16,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 255 treesize of output 255 [2022-02-16 13:56:16,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:16,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:16,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:16,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:16,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:16,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:17,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:17,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 223 treesize of output 321 [2022-02-16 13:56:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:18,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133360293] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:18,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:18,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-16 13:56:18,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989103850] [2022-02-16 13:56:18,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:18,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 13:56:18,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:18,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 13:56:18,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:56:18,402 INFO L87 Difference]: Start difference. First operand 1608 states and 4736 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:20,242 INFO L93 Difference]: Finished difference Result 1829 states and 5272 transitions. [2022-02-16 13:56:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:56:20,242 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:56:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:20,254 INFO L225 Difference]: With dead ends: 1829 [2022-02-16 13:56:20,254 INFO L226 Difference]: Without dead ends: 1826 [2022-02-16 13:56:20,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:56:20,254 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:20,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 92 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 13:56:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2022-02-16 13:56:20,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1698. [2022-02-16 13:56:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.972893341190336) internal successors, (5045), 1697 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5045 transitions. [2022-02-16 13:56:20,274 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5045 transitions. Word has length 18 [2022-02-16 13:56:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:20,274 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 5045 transitions. [2022-02-16 13:56:20,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5045 transitions. [2022-02-16 13:56:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:56:20,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:20,276 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:20,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Ended with exit code 0 [2022-02-16 13:56:20,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2022-02-16 13:56:20,483 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:56:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1402456003, now seen corresponding path program 412 times [2022-02-16 13:56:20,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:20,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405221316] [2022-02-16 13:56:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:20,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:20,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:20,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405221316] [2022-02-16 13:56:20,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405221316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:20,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837472402] [2022-02-16 13:56:20,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:56:20,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:20,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:20,891 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:20,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-02-16 13:56:20,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:56:20,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:20,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:56:20,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:21,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:21,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:21,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:21,798 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:56:21,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:56:21,803 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:56:21,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:56:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:21,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:23,311 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:56:23,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-02-16 13:56:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:23,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:23,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:23,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:23,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:23,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:23,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-02-16 13:56:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:23,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837472402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:23,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:23,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:56:23,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872939235] [2022-02-16 13:56:23,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:23,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:56:23,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:23,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:56:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:56:23,840 INFO L87 Difference]: Start difference. First operand 1698 states and 5045 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:25,686 INFO L93 Difference]: Finished difference Result 1820 states and 5298 transitions. [2022-02-16 13:56:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:56:25,686 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:56:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:25,688 INFO L225 Difference]: With dead ends: 1820 [2022-02-16 13:56:25,688 INFO L226 Difference]: Without dead ends: 1813 [2022-02-16 13:56:25,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:56:25,689 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:25,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 44 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 775 Invalid, 0 Unknown, 257 Unchecked, 0.5s Time] [2022-02-16 13:56:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2022-02-16 13:56:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1715. [2022-02-16 13:56:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1714 states have (on average 2.9737456242707117) internal successors, (5097), 1714 states have internal predecessors, (5097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 5097 transitions. [2022-02-16 13:56:25,706 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 5097 transitions. Word has length 18 [2022-02-16 13:56:25,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:25,707 INFO L470 AbstractCegarLoop]: Abstraction has 1715 states and 5097 transitions. [2022-02-16 13:56:25,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 5097 transitions. [2022-02-16 13:56:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:56:25,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:25,708 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:25,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Ended with exit code 0 [2022-02-16 13:56:25,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:25,923 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:56:25,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:25,923 INFO L85 PathProgramCache]: Analyzing trace with hash -299994977, now seen corresponding path program 413 times [2022-02-16 13:56:25,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:25,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583059388] [2022-02-16 13:56:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:25,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:26,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:26,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583059388] [2022-02-16 13:56:26,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583059388] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:26,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575260359] [2022-02-16 13:56:26,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:56:26,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:26,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:26,753 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:26,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-02-16 13:56:26,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:56:26,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:26,781 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:56:26,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:27,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:27,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:27,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:27,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:27,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:27,773 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:56:27,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:56:27,779 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:56:27,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:56:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:27,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:29,337 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:56:29,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 260 treesize of output 264 [2022-02-16 13:56:29,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:29,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:29,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:29,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:29,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:29,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:29,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:29,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 232 treesize of output 334 [2022-02-16 13:56:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:30,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575260359] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:30,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:30,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-16 13:56:30,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384843520] [2022-02-16 13:56:30,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:30,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:56:30,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:30,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:56:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:56:30,315 INFO L87 Difference]: Start difference. First operand 1715 states and 5097 transitions. Second operand has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:33,217 INFO L93 Difference]: Finished difference Result 1798 states and 5235 transitions. [2022-02-16 13:56:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:56:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:56:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:33,220 INFO L225 Difference]: With dead ends: 1798 [2022-02-16 13:56:33,220 INFO L226 Difference]: Without dead ends: 1789 [2022-02-16 13:56:33,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=210, Invalid=2546, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 13:56:33,221 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:33,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 56 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 914 Invalid, 0 Unknown, 444 Unchecked, 0.6s Time] [2022-02-16 13:56:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-02-16 13:56:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1716. [2022-02-16 13:56:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 2.9737609329446064) internal successors, (5100), 1715 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5100 transitions. [2022-02-16 13:56:33,239 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5100 transitions. Word has length 18 [2022-02-16 13:56:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:33,239 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 5100 transitions. [2022-02-16 13:56:33,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5100 transitions. [2022-02-16 13:56:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:56:33,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:33,241 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:33,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:33,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2022-02-16 13:56:33,455 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:56:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1956158881, now seen corresponding path program 414 times [2022-02-16 13:56:33,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:33,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223254740] [2022-02-16 13:56:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:33,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:33,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:33,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223254740] [2022-02-16 13:56:33,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223254740] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:33,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164838678] [2022-02-16 13:56:33,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:56:33,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:33,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:33,700 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:33,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-02-16 13:56:33,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:56:33,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:33,730 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 13:56:33,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:34,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:34,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:34,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 73 [2022-02-16 13:56:34,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:34,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:56:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:34,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:35,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,241 INFO L353 Elim1Store]: treesize reduction 196, result has 26.0 percent of original size [2022-02-16 13:56:35,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 324 treesize of output 308 [2022-02-16 13:56:35,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:35,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:35,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 276 treesize of output 384 [2022-02-16 13:56:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:36,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164838678] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:36,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:36,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-16 13:56:36,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751874263] [2022-02-16 13:56:36,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:36,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:56:36,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:56:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:56:36,381 INFO L87 Difference]: Start difference. First operand 1716 states and 5100 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:42,708 INFO L93 Difference]: Finished difference Result 1851 states and 5316 transitions. [2022-02-16 13:56:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 13:56:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:56:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:42,711 INFO L225 Difference]: With dead ends: 1851 [2022-02-16 13:56:42,711 INFO L226 Difference]: Without dead ends: 1845 [2022-02-16 13:56:42,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=399, Invalid=3383, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 13:56:42,711 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:42,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 117 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 13:56:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2022-02-16 13:56:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1733. [2022-02-16 13:56:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 2.9682448036951503) internal successors, (5141), 1732 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 5141 transitions. [2022-02-16 13:56:42,730 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 5141 transitions. Word has length 18 [2022-02-16 13:56:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:42,730 INFO L470 AbstractCegarLoop]: Abstraction has 1733 states and 5141 transitions. [2022-02-16 13:56:42,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 5141 transitions. [2022-02-16 13:56:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:56:42,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:42,732 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:42,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:42,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2022-02-16 13:56:42,948 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:56:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:42,948 INFO L85 PathProgramCache]: Analyzing trace with hash -206788129, now seen corresponding path program 415 times [2022-02-16 13:56:42,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:42,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340154130] [2022-02-16 13:56:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:42,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:43,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:43,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340154130] [2022-02-16 13:56:43,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340154130] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:43,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500318829] [2022-02-16 13:56:43,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:56:43,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:43,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:43,288 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:43,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-02-16 13:56:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:43,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:56:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:44,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:44,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:44,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:44,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:44,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:44,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 75 [2022-02-16 13:56:44,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:44,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:56:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:44,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:45,478 INFO L353 Elim1Store]: treesize reduction 268, result has 20.5 percent of original size [2022-02-16 13:56:45,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 292 treesize of output 280 [2022-02-16 13:56:45,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:45,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:45,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 248 treesize of output 360 [2022-02-16 13:56:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:46,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500318829] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:46,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:46,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:56:46,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88923424] [2022-02-16 13:56:46,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:46,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:56:46,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:56:46,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:56:46,087 INFO L87 Difference]: Start difference. First operand 1733 states and 5141 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:47,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:47,968 INFO L93 Difference]: Finished difference Result 1917 states and 5497 transitions. [2022-02-16 13:56:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:56:47,968 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:56:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:47,980 INFO L225 Difference]: With dead ends: 1917 [2022-02-16 13:56:47,980 INFO L226 Difference]: Without dead ends: 1908 [2022-02-16 13:56:47,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=246, Invalid=2106, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:56:47,980 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 99 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:47,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 110 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1082 Invalid, 0 Unknown, 53 Unchecked, 0.6s Time] [2022-02-16 13:56:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2022-02-16 13:56:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1778. [2022-02-16 13:56:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.9701744513224537) internal successors, (5278), 1777 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5278 transitions. [2022-02-16 13:56:48,001 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5278 transitions. Word has length 18 [2022-02-16 13:56:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:48,001 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 5278 transitions. [2022-02-16 13:56:48,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5278 transitions. [2022-02-16 13:56:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:56:48,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:48,003 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:48,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Ended with exit code 0 [2022-02-16 13:56:48,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2022-02-16 13:56:48,219 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:56:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash 207374405, now seen corresponding path program 416 times [2022-02-16 13:56:48,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:48,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015480039] [2022-02-16 13:56:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:48,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:48,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:48,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015480039] [2022-02-16 13:56:48,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015480039] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:48,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349198883] [2022-02-16 13:56:48,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:56:48,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:48,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:48,493 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:48,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-02-16 13:56:48,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:48,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:48,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 13:56:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:49,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:49,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:49,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:49,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:56:49,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:49,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 75 [2022-02-16 13:56:49,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:49,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:56:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:49,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:50,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,485 INFO L353 Elim1Store]: treesize reduction 196, result has 26.0 percent of original size [2022-02-16 13:56:50,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 313 treesize of output 297 [2022-02-16 13:56:50,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:56:50,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:50,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 265 treesize of output 373 [2022-02-16 13:56:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:53,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349198883] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:53,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:53,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-02-16 13:56:53,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929743437] [2022-02-16 13:56:53,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:53,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 13:56:53,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:53,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 13:56:53,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:56:53,081 INFO L87 Difference]: Start difference. First operand 1778 states and 5278 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:03,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:03,347 INFO L93 Difference]: Finished difference Result 2037 states and 5725 transitions. [2022-02-16 13:57:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 13:57:03,348 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:57:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:03,350 INFO L225 Difference]: With dead ends: 2037 [2022-02-16 13:57:03,351 INFO L226 Difference]: Without dead ends: 2027 [2022-02-16 13:57:03,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=771, Invalid=4779, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 13:57:03,351 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 147 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:03,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 97 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-16 13:57:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-02-16 13:57:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1842. [2022-02-16 13:57:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 2.975556762629006) internal successors, (5478), 1841 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 5478 transitions. [2022-02-16 13:57:03,372 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 5478 transitions. Word has length 18 [2022-02-16 13:57:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:03,373 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 5478 transitions. [2022-02-16 13:57:03,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 5478 transitions. [2022-02-16 13:57:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:57:03,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:03,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:03,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:03,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:03,590 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:57:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:03,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1274300193, now seen corresponding path program 417 times [2022-02-16 13:57:03,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:03,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944184212] [2022-02-16 13:57:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:03,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:03,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:03,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944184212] [2022-02-16 13:57:03,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944184212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:03,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165786988] [2022-02-16 13:57:03,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:57:03,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:03,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:03,895 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:03,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-02-16 13:57:03,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:57:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:03,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:57:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:04,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:04,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:04,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:04,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:04,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:04,505 INFO L353 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2022-02-16 13:57:04,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 84 [2022-02-16 13:57:04,510 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:57:04,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:57:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:04,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:05,577 INFO L353 Elim1Store]: treesize reduction 268, result has 20.5 percent of original size [2022-02-16 13:57:05,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 292 treesize of output 280 [2022-02-16 13:57:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:05,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:05,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 248 treesize of output 360 [2022-02-16 13:57:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:06,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165786988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:06,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:06,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-16 13:57:06,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541670523] [2022-02-16 13:57:06,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:06,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 13:57:06,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:06,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 13:57:06,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:57:06,912 INFO L87 Difference]: Start difference. First operand 1842 states and 5478 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:09,860 INFO L93 Difference]: Finished difference Result 2083 states and 6002 transitions. [2022-02-16 13:57:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 13:57:09,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:57:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:09,864 INFO L225 Difference]: With dead ends: 2083 [2022-02-16 13:57:09,864 INFO L226 Difference]: Without dead ends: 2077 [2022-02-16 13:57:09,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=285, Invalid=2165, Unknown=0, NotChecked=0, Total=2450 [2022-02-16 13:57:09,864 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 122 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:09,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 69 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 861 Invalid, 0 Unknown, 178 Unchecked, 0.6s Time] [2022-02-16 13:57:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-02-16 13:57:09,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1914. [2022-02-16 13:57:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.9837950862519604) internal successors, (5708), 1913 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 5708 transitions. [2022-02-16 13:57:09,887 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 5708 transitions. Word has length 18 [2022-02-16 13:57:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:09,887 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 5708 transitions. [2022-02-16 13:57:09,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 5708 transitions. [2022-02-16 13:57:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:57:09,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:09,889 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:09,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Ended with exit code 0 [2022-02-16 13:57:10,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2022-02-16 13:57:10,105 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:57:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash -7435809, now seen corresponding path program 418 times [2022-02-16 13:57:10,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:10,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948505133] [2022-02-16 13:57:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:10,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:10,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:10,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948505133] [2022-02-16 13:57:10,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948505133] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:10,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896344160] [2022-02-16 13:57:10,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:57:10,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:10,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:10,344 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:10,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-02-16 13:57:10,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:57:10,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:10,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:57:10,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:11,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:11,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:11,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:11,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:11,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:11,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:11,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:11,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:11,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:11,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:11,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:57:11,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:11,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:57:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:11,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:12,331 INFO L353 Elim1Store]: treesize reduction 268, result has 20.5 percent of original size [2022-02-16 13:57:12,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 292 treesize of output 280 [2022-02-16 13:57:12,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:12,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:12,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 248 treesize of output 360 [2022-02-16 13:57:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:13,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896344160] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:13,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:13,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-16 13:57:13,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974396357] [2022-02-16 13:57:13,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:13,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 13:57:13,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:13,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 13:57:13,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:57:13,168 INFO L87 Difference]: Start difference. First operand 1914 states and 5708 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:16,023 INFO L93 Difference]: Finished difference Result 2254 states and 6601 transitions. [2022-02-16 13:57:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:57:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:57:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:16,027 INFO L225 Difference]: With dead ends: 2254 [2022-02-16 13:57:16,027 INFO L226 Difference]: Without dead ends: 2247 [2022-02-16 13:57:16,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 13:57:16,027 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 129 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:16,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 53 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 836 Invalid, 0 Unknown, 245 Unchecked, 0.5s Time] [2022-02-16 13:57:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-02-16 13:57:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2012. [2022-02-16 13:57:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.012431626056688) internal successors, (6058), 2011 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 6058 transitions. [2022-02-16 13:57:16,050 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 6058 transitions. Word has length 18 [2022-02-16 13:57:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:16,051 INFO L470 AbstractCegarLoop]: Abstraction has 2012 states and 6058 transitions. [2022-02-16 13:57:16,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:16,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 6058 transitions. [2022-02-16 13:57:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:57:16,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:16,053 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:16,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:16,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2022-02-16 13:57:16,255 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:57:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1600085377, now seen corresponding path program 419 times [2022-02-16 13:57:16,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:16,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788814442] [2022-02-16 13:57:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:16,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:16,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:16,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788814442] [2022-02-16 13:57:16,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788814442] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:16,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085518866] [2022-02-16 13:57:16,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:57:16,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:16,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:16,538 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:16,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-02-16 13:57:16,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:57:16,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:16,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:57:16,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:17,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:17,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:17,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:17,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:17,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:17,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:57:17,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:17,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:57:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:17,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:18,233 INFO L353 Elim1Store]: treesize reduction 268, result has 20.5 percent of original size [2022-02-16 13:57:18,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 292 treesize of output 280 [2022-02-16 13:57:18,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:18,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:18,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 248 treesize of output 360 [2022-02-16 13:57:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:18,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085518866] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:18,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:18,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:57:18,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121229243] [2022-02-16 13:57:18,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:18,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:57:18,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:57:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:57:18,990 INFO L87 Difference]: Start difference. First operand 2012 states and 6058 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:21,223 INFO L93 Difference]: Finished difference Result 2144 states and 6266 transitions. [2022-02-16 13:57:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:57:21,223 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:57:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:21,227 INFO L225 Difference]: With dead ends: 2144 [2022-02-16 13:57:21,227 INFO L226 Difference]: Without dead ends: 2138 [2022-02-16 13:57:21,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 13:57:21,227 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 145 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:21,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 51 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 831 Invalid, 0 Unknown, 229 Unchecked, 0.4s Time] [2022-02-16 13:57:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2022-02-16 13:57:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1982. [2022-02-16 13:57:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.0085815244825844) internal successors, (5960), 1981 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 5960 transitions. [2022-02-16 13:57:21,251 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 5960 transitions. Word has length 18 [2022-02-16 13:57:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:21,251 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 5960 transitions. [2022-02-16 13:57:21,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 5960 transitions. [2022-02-16 13:57:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:57:21,254 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:21,254 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:21,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:21,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-02-16 13:57:21,467 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:57:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:21,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1095025217, now seen corresponding path program 420 times [2022-02-16 13:57:21,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:21,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348993643] [2022-02-16 13:57:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:21,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:21,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:21,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348993643] [2022-02-16 13:57:21,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348993643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:21,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390773350] [2022-02-16 13:57:21,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:57:21,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:21,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:21,688 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:21,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-02-16 13:57:21,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:57:21,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:21,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:57:21,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:22,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:22,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:22,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:22,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:22,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:22,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:22,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:22,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:22,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-02-16 13:57:22,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:22,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-16 13:57:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:22,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:23,961 INFO L353 Elim1Store]: treesize reduction 268, result has 20.5 percent of original size [2022-02-16 13:57:23,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 292 treesize of output 280 [2022-02-16 13:57:23,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:23,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:24,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:24,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 248 treesize of output 360 [2022-02-16 13:57:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:25,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390773350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:25,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:25,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-16 13:57:25,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775928476] [2022-02-16 13:57:25,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:25,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 13:57:25,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 13:57:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:57:25,037 INFO L87 Difference]: Start difference. First operand 1982 states and 5960 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:27,093 INFO L93 Difference]: Finished difference Result 2154 states and 6308 transitions. [2022-02-16 13:57:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:57:27,093 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:57:27,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:27,097 INFO L225 Difference]: With dead ends: 2154 [2022-02-16 13:57:27,097 INFO L226 Difference]: Without dead ends: 2148 [2022-02-16 13:57:27,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=211, Invalid=1595, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:57:27,097 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 92 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:27,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 72 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 828 Invalid, 0 Unknown, 173 Unchecked, 0.5s Time] [2022-02-16 13:57:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2022-02-16 13:57:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2019. [2022-02-16 13:57:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 3.010901883052527) internal successors, (6076), 2018 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 6076 transitions. [2022-02-16 13:57:27,134 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 6076 transitions. Word has length 18 [2022-02-16 13:57:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:27,134 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 6076 transitions. [2022-02-16 13:57:27,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 6076 transitions. [2022-02-16 13:57:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:57:27,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:27,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:27,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:27,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2022-02-16 13:57:27,352 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:57:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:27,353 INFO L85 PathProgramCache]: Analyzing trace with hash 610654431, now seen corresponding path program 421 times [2022-02-16 13:57:27,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:27,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556035945] [2022-02-16 13:57:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:27,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:27,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:27,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556035945] [2022-02-16 13:57:27,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556035945] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:27,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418650234] [2022-02-16 13:57:27,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:57:27,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:27,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:27,764 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:27,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-02-16 13:57:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:27,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:57:27,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:28,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:28,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:28,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:28,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:28,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:28,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:28,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:28,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:28,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:28,601 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:57:28,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:57:28,606 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:57:28,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:57:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:28,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:29,860 INFO L353 Elim1Store]: treesize reduction 268, result has 20.5 percent of original size [2022-02-16 13:57:29,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 292 treesize of output 280 [2022-02-16 13:57:29,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:29,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:29,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 248 treesize of output 360 [2022-02-16 13:57:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:30,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418650234] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:30,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:30,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-16 13:57:30,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870750913] [2022-02-16 13:57:30,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:30,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:57:30,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:30,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:57:30,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:57:30,525 INFO L87 Difference]: Start difference. First operand 2019 states and 6076 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:32,494 INFO L93 Difference]: Finished difference Result 2181 states and 6398 transitions. [2022-02-16 13:57:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 13:57:32,495 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:57:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:32,498 INFO L225 Difference]: With dead ends: 2181 [2022-02-16 13:57:32,498 INFO L226 Difference]: Without dead ends: 2174 [2022-02-16 13:57:32,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2022-02-16 13:57:32,498 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:32,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 88 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 932 Invalid, 0 Unknown, 422 Unchecked, 0.5s Time] [2022-02-16 13:57:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-02-16 13:57:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2051. [2022-02-16 13:57:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.011219512195122) internal successors, (6173), 2050 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6173 transitions. [2022-02-16 13:57:32,521 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6173 transitions. Word has length 18 [2022-02-16 13:57:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:32,521 INFO L470 AbstractCegarLoop]: Abstraction has 2051 states and 6173 transitions. [2022-02-16 13:57:32,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6173 transitions. [2022-02-16 13:57:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:57:32,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:32,523 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:32,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:32,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2022-02-16 13:57:32,736 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:57:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:32,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1500373859, now seen corresponding path program 422 times [2022-02-16 13:57:32,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:32,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173529377] [2022-02-16 13:57:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:32,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:33,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:33,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173529377] [2022-02-16 13:57:33,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173529377] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:33,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470907132] [2022-02-16 13:57:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:57:33,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:33,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:33,197 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:33,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-02-16 13:57:33,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:33,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:33,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-16 13:57:33,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:34,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:34,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:34,014 INFO L353 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-02-16 13:57:34,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:57:34,019 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:57:34,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:57:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:34,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:35,047 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-16 13:57:35,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 266 treesize of output 270 [2022-02-16 13:57:35,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:35,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:35,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:35,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:35,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:35,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:35,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:35,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 340 [2022-02-16 13:57:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:35,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470907132] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:35,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:35,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-16 13:57:35,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140476867] [2022-02-16 13:57:35,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:35,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 13:57:35,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 13:57:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:57:35,728 INFO L87 Difference]: Start difference. First operand 2051 states and 6173 transitions. Second operand has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:37,233 INFO L93 Difference]: Finished difference Result 2576 states and 7592 transitions. [2022-02-16 13:57:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:57:37,234 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:57:37,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:37,238 INFO L225 Difference]: With dead ends: 2576 [2022-02-16 13:57:37,238 INFO L226 Difference]: Without dead ends: 2573 [2022-02-16 13:57:37,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=179, Invalid=2173, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 13:57:37,239 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:37,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 622 Invalid, 0 Unknown, 23 Unchecked, 0.4s Time] [2022-02-16 13:57:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2022-02-16 13:57:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2053. [2022-02-16 13:57:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 3.010233918128655) internal successors, (6177), 2052 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 6177 transitions. [2022-02-16 13:57:37,273 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 6177 transitions. Word has length 18 [2022-02-16 13:57:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:37,273 INFO L470 AbstractCegarLoop]: Abstraction has 2053 states and 6177 transitions. [2022-02-16 13:57:37,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 6177 transitions. [2022-02-16 13:57:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:57:37,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:37,276 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:37,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Ended with exit code 0 [2022-02-16 13:57:37,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2022-02-16 13:57:37,493 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:57:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:37,493 INFO L85 PathProgramCache]: Analyzing trace with hash 912628537, now seen corresponding path program 423 times [2022-02-16 13:57:37,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:37,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787746836] [2022-02-16 13:57:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:37,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:37,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:37,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787746836] [2022-02-16 13:57:37,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787746836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:37,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493876485] [2022-02-16 13:57:37,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:57:37,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:37,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:37,879 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:37,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-02-16 13:57:37,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:57:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:37,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-16 13:57:37,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:38,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:38,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:38,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 13:57:38,693 INFO L353 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-02-16 13:57:38,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 107 treesize of output 86 [2022-02-16 13:57:38,697 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:57:38,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-16 13:57:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:38,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:39,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,904 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-16 13:57:39,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 286 treesize of output 286 [2022-02-16 13:57:39,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:57:39,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:39,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 254 treesize of output 352 [2022-02-16 13:57:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:40,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493876485] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:40,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:40,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-02-16 13:57:40,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067629517] [2022-02-16 13:57:40,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:40,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-16 13:57:40,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-16 13:57:40,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:57:40,694 INFO L87 Difference]: Start difference. First operand 2053 states and 6177 transitions. Second operand has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-02-16 13:57:43,140 WARN L244 SmtUtils]: Removed 22 from assertion stack [2022-02-16 13:57:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:57:43,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 13:57:43,141 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:43,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 834 Invalid, 0 Unknown, 108 Unchecked, 0.5s Time] [2022-02-16 13:57:43,141 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-16 13:57:43,151 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 13:57:43,152 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 13:57:43,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Ended with exit code 0 [2022-02-16 13:57:43,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2022-02-16 13:57:43,342 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (2053states) and FLOYD_HOARE automaton (currently 26 states, 34 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 187 for 80ms.. [2022-02-16 13:57:43,343 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-16 13:57:43,343 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-16 13:57:43,345 INFO L732 BasicCegarLoop]: Path program histogram: [423, 6, 6, 2] [2022-02-16 13:57:43,346 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-16 13:57:43,346 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-16 13:57:43,347 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 01:57:43 BasicIcfg [2022-02-16 13:57:43,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-16 13:57:43,348 INFO L158 Benchmark]: Toolchain (without parser) took 920220.92ms. Allocated memory was 165.7MB in the beginning and 540.0MB in the end (delta: 374.3MB). Free memory was 128.9MB in the beginning and 463.9MB in the end (delta: -334.9MB). Peak memory consumption was 41.0MB. Max. memory is 8.0GB. [2022-02-16 13:57:43,348 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 165.7MB. Free memory is still 130.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-16 13:57:43,348 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.32ms. Allocated memory is still 165.7MB. Free memory was 128.8MB in the beginning and 127.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 13:57:43,348 INFO L158 Benchmark]: Boogie Preprocessor took 10.91ms. Allocated memory is still 165.7MB. Free memory was 127.3MB in the beginning and 126.3MB in the end (delta: 963.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 13:57:43,348 INFO L158 Benchmark]: RCFGBuilder took 224.85ms. Allocated memory is still 165.7MB. Free memory was 126.3MB in the beginning and 115.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-16 13:57:43,348 INFO L158 Benchmark]: TraceAbstraction took 919963.34ms. Allocated memory was 165.7MB in the beginning and 540.0MB in the end (delta: 374.3MB). Free memory was 114.9MB in the beginning and 463.9MB in the end (delta: -349.0MB). Peak memory consumption was 26.3MB. Max. memory is 8.0GB. [2022-02-16 13:57:43,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 165.7MB. Free memory is still 130.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.32ms. Allocated memory is still 165.7MB. Free memory was 128.8MB in the beginning and 127.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.91ms. Allocated memory is still 165.7MB. Free memory was 127.3MB in the beginning and 126.3MB in the end (delta: 963.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 224.85ms. Allocated memory is still 165.7MB. Free memory was 126.3MB in the beginning and 115.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 919963.34ms. Allocated memory was 165.7MB in the beginning and 540.0MB in the end (delta: 374.3MB). Free memory was 114.9MB in the beginning and 463.9MB in the end (delta: -349.0MB). Peak memory consumption was 26.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (2053states) and FLOYD_HOARE automaton (currently 26 states, 34 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 187 for 80ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2053states) and FLOYD_HOARE automaton (currently 26 states, 34 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 187 for 80ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2053states) and FLOYD_HOARE automaton (currently 26 states, 34 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 187 for 80ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 919.9s, OverallIterations: 437, TraceHistogramMax: 5, PathProgramHistogramMax: 423, EmptinessCheckTime: 0.4s, AutomataDifference: 409.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27197 SdHoareTripleChecker+Valid, 106.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27197 mSDsluCounter, 28834 SdHoareTripleChecker+Invalid, 91.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 18533 IncrementalHoareTripleChecker+Unchecked, 74789 mSDsCounter, 9263 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 243710 IncrementalHoareTripleChecker+Invalid, 271506 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9263 mSolverCounterUnsat, 2398 mSDtfsCounter, 243710 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23054 GetRequests, 8398 SyntacticMatches, 1150 SemanticMatches, 13505 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109727 ImplicationChecksByTransitivity, 437.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2053occurred in iteration=436, InterpolantAutomatonStates: 10406, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.9s AutomataMinimizationTime, 436 MinimizatonAttempts, 48670 StatesRemovedByMinimization, 436 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 400.6s InterpolantComputationTime, 13784 NumberOfCodeBlocks, 13784 NumberOfCodeBlocksAsserted, 1462 NumberOfCheckSat, 19331 ConstructedInterpolants, 546 QuantifiedInterpolants, 412564 SizeOfPredicates, 4110 NumberOfNonLiveVariables, 32500 ConjunctsInSsa, 11207 ConjunctsInUnsatCore, 1291 InterpolantComputations, 10 PerfectInterpolantSequences, 2073/16472 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown