/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 [2022-02-10 03:00:48,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 03:00:48,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 03:00:48,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-10 03:00:48,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-10 03:00:48,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-10 03:00:48,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-10 03:00:48,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-10 03:00:48,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-10 03:00:48,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-10 03:00:48,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-10 03:00:48,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-10 03:00:48,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-10 03:00:48,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-10 03:00:48,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-10 03:00:48,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-10 03:00:48,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-10 03:00:48,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-10 03:00:48,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-10 03:00:48,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-10 03:00:48,118 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 [2022-02-10 03:00:48,140 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 03:00:48,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 03:00:48,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 03:00:48,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 03:00:48,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 03:00:48,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 03:00:48,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 03:00:48,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 03:00:48,142 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 03:00:48,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 03:00:48,143 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 03:00:48,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 03:00:48,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 03:00:48,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 03:00:48,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 03:00:48,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 03:00:48,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 03:00:48,144 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 03:00:48,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 03:00:48,144 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 03:00:48,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 03:00:48,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 03:00:48,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 03:00:48,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 03:00:48,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 03:00:48,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:00:48,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 03:00:48,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 03:00:48,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 03:00:48,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 03:00:48,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 03:00:48,146 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 03:00:48,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 03:00:48,147 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 03:00:48,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 03:00:48,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 03:00:48,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 03:00:48,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 03:00:48,334 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 03:00:48,335 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 03:00:48,335 INFO L432 ainManager$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 [2022-02-10 03:00:48,336 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl' [2022-02-10 03:00:48,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 03:00:48,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 03:00:48,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 03:00:48,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 03:00:48,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 03:00:48,364 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 10.02 03:00:48" (1/1) ... [2022-02-10 03:00:48,369 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 10.02 03:00:48" (1/1) ... [2022-02-10 03:00:48,373 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 03:00:48,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 03:00:48,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 03:00:48,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 03:00:48,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 03:00:48,380 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 10.02 03:00:48" (1/1) ... [2022-02-10 03:00:48,380 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 10.02 03:00:48" (1/1) ... [2022-02-10 03:00:48,381 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 10.02 03:00:48" (1/1) ... [2022-02-10 03:00:48,381 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 10.02 03:00:48" (1/1) ... [2022-02-10 03:00:48,383 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 10.02 03:00:48" (1/1) ... [2022-02-10 03:00:48,384 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 10.02 03:00:48" (1/1) ... [2022-02-10 03:00:48,387 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 10.02 03:00:48" (1/1) ... [2022-02-10 03:00:48,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 03:00:48,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 03:00:48,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 03:00:48,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 03:00:48,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:00:48" (1/1) ... [2022-02-10 03:00:48,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:00:48,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:48,420 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) [2022-02-10 03:00:48,427 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 [2022-02-10 03:00:48,446 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 03:00:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 03:00:48,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 03:00:48,447 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 03:00:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 03:00:48,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 03:00:48,447 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 03:00:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 03:00:48,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 03:00:48,448 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 03:00:48,483 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 03:00:48,484 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 03:00:48,550 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 03:00:48,571 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 03:00:48,572 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-10 03:00:48,572 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-02-10 03:00:48,573 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-02-10 03:00:48,574 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:00:48 BoogieIcfgContainer [2022-02-10 03:00:48,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 03:00:48,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 03:00:48,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 03:00:48,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 03:00:48,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:00:48" (1/2) ... [2022-02-10 03:00:48,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242b7335 and model type array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 03:00:48, skipping insertion in model container [2022-02-10 03:00:48,578 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 10.02 03:00:48" (2/2) ... [2022-02-10 03:00:48,579 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-symm.wvr.bpl [2022-02-10 03:00:48,582 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 03:00:48,582 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 03:00:48,582 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 03:00:48,582 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 03:00:48,605 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-10 03:00:48,636 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 03:00:48,641 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 [2022-02-10 03:00:48,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-10 03:00:48,647 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2022-02-10 03:00:48,657 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) [2022-02-10 03:00:48,763 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 436 transitions and produced 297 states. [2022-02-10 03:00:48,769 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) [2022-02-10 03:00:48,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-10 03:00:48,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:48,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:48,792 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:48,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash -580385373, now seen corresponding path program 1 times [2022-02-10 03:00:48,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:48,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507006778] [2022-02-10 03:00:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:48,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:48,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:48,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507006778] [2022-02-10 03:00:48,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507006778] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:00:48,953 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:00:48,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:00:48,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512881535] [2022-02-10 03:00:48,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:00:48,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:00:48,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:48,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:00:48,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:00:48,973 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) [2022-02-10 03:00:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:49,084 INFO L93 Difference]: Finished difference Result 303 states and 374 transitions. [2022-02-10 03:00:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:00:49,087 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 [2022-02-10 03:00:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:49,097 INFO L225 Difference]: With dead ends: 303 [2022-02-10 03:00:49,097 INFO L226 Difference]: Without dead ends: 260 [2022-02-10 03:00:49,098 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 [2022-02-10 03:00:49,101 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:00:49,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:00:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-10 03:00:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 20. [2022-02-10 03:00:49,126 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) [2022-02-10 03:00:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 34 transitions. [2022-02-10 03:00:49,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 34 transitions. Word has length 10 [2022-02-10 03:00:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:49,127 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 34 transitions. [2022-02-10 03:00:49,128 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) [2022-02-10 03:00:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 34 transitions. [2022-02-10 03:00:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-10 03:00:49,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:49,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:49,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 03:00:49,128 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:49,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:49,129 INFO L85 PathProgramCache]: Analyzing trace with hash -481455773, now seen corresponding path program 2 times [2022-02-10 03:00:49,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:49,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158448367] [2022-02-10 03:00:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:49,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:49,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:49,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158448367] [2022-02-10 03:00:49,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158448367] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:00:49,174 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:00:49,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:00:49,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215883915] [2022-02-10 03:00:49,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:00:49,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:00:49,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:00:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:00:49,176 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) [2022-02-10 03:00:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:49,225 INFO L93 Difference]: Finished difference Result 36 states and 60 transitions. [2022-02-10 03:00:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:00:49,225 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 [2022-02-10 03:00:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:49,227 INFO L225 Difference]: With dead ends: 36 [2022-02-10 03:00:49,227 INFO L226 Difference]: Without dead ends: 33 [2022-02-10 03:00:49,228 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 [2022-02-10 03:00:49,230 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 [2022-02-10 03:00:49,232 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] [2022-02-10 03:00:49,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-10 03:00:49,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2022-02-10 03:00:49,242 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) [2022-02-10 03:00:49,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 38 transitions. [2022-02-10 03:00:49,243 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 38 transitions. Word has length 10 [2022-02-10 03:00:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:49,243 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 38 transitions. [2022-02-10 03:00:49,244 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) [2022-02-10 03:00:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 38 transitions. [2022-02-10 03:00:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:49,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:49,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:49,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 03:00:49,247 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:49,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash -845334535, now seen corresponding path program 1 times [2022-02-10 03:00:49,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:49,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852613964] [2022-02-10 03:00:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:49,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:49,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:49,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852613964] [2022-02-10 03:00:49,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852613964] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:00:49,340 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:00:49,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:00:49,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620495956] [2022-02-10 03:00:49,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:00:49,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:00:49,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:49,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:00:49,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:00:49,341 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) [2022-02-10 03:00:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:49,398 INFO L93 Difference]: Finished difference Result 31 states and 50 transitions. [2022-02-10 03:00:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:49,399 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 [2022-02-10 03:00:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:49,399 INFO L225 Difference]: With dead ends: 31 [2022-02-10 03:00:49,399 INFO L226 Difference]: Without dead ends: 29 [2022-02-10 03:00:49,400 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 [2022-02-10 03:00:49,402 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 [2022-02-10 03:00:49,404 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] [2022-02-10 03:00:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-10 03:00:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2022-02-10 03:00:49,413 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) [2022-02-10 03:00:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2022-02-10 03:00:49,414 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2022-02-10 03:00:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:49,414 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2022-02-10 03:00:49,414 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) [2022-02-10 03:00:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2022-02-10 03:00:49,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:49,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:49,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:49,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-10 03:00:49,417 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:49,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash -906160713, now seen corresponding path program 1 times [2022-02-10 03:00:49,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:49,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287982302] [2022-02-10 03:00:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:49,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:49,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:49,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287982302] [2022-02-10 03:00:49,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287982302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:49,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581300966] [2022-02-10 03:00:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:49,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:49,479 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) [2022-02-10 03:00:49,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-10 03:00:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:49,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:00:49,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:49,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:49,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581300966] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:49,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:49,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-10 03:00:49,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737743777] [2022-02-10 03:00:49,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:49,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 03:00:49,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:49,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 03:00:49,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:00:49,735 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) [2022-02-10 03:00:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:49,795 INFO L93 Difference]: Finished difference Result 31 states and 52 transitions. [2022-02-10 03:00:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:49,796 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 [2022-02-10 03:00:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:49,797 INFO L225 Difference]: With dead ends: 31 [2022-02-10 03:00:49,797 INFO L226 Difference]: Without dead ends: 31 [2022-02-10 03:00:49,797 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 [2022-02-10 03:00:49,799 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 [2022-02-10 03:00:49,802 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] [2022-02-10 03:00:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-10 03:00:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-02-10 03:00:49,806 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) [2022-02-10 03:00:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 39 transitions. [2022-02-10 03:00:49,806 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 39 transitions. Word has length 11 [2022-02-10 03:00:49,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:49,806 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 39 transitions. [2022-02-10 03:00:49,806 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) [2022-02-10 03:00:49,807 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 39 transitions. [2022-02-10 03:00:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:49,807 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:49,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:49,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-10 03:00:50,022 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 [2022-02-10 03:00:50,022 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -742242413, now seen corresponding path program 2 times [2022-02-10 03:00:50,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:50,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494602882] [2022-02-10 03:00:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:50,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:50,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:50,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494602882] [2022-02-10 03:00:50,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494602882] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:50,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384721985] [2022-02-10 03:00:50,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:00:50,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:50,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:50,080 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) [2022-02-10 03:00:50,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 03:00:50,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:00:50,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:00:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:00:50,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:50,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:50,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384721985] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:50,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:50,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-10 03:00:50,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205326383] [2022-02-10 03:00:50,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:50,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 03:00:50,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:50,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 03:00:50,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-10 03:00:50,244 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) [2022-02-10 03:00:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:50,289 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2022-02-10 03:00:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:50,290 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 [2022-02-10 03:00:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:50,291 INFO L225 Difference]: With dead ends: 42 [2022-02-10 03:00:50,293 INFO L226 Difference]: Without dead ends: 42 [2022-02-10 03:00:50,294 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 [2022-02-10 03:00:50,295 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 [2022-02-10 03:00:50,295 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] [2022-02-10 03:00:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-10 03:00:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2022-02-10 03:00:50,297 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) [2022-02-10 03:00:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 46 transitions. [2022-02-10 03:00:50,297 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 46 transitions. Word has length 11 [2022-02-10 03:00:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:50,298 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 46 transitions. [2022-02-10 03:00:50,298 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) [2022-02-10 03:00:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 46 transitions. [2022-02-10 03:00:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:50,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:50,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:50,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-10 03:00:50,511 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 [2022-02-10 03:00:50,511 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:50,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash 59373815, now seen corresponding path program 2 times [2022-02-10 03:00:50,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:50,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292603797] [2022-02-10 03:00:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:50,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:50,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:50,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292603797] [2022-02-10 03:00:50,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292603797] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:00:50,551 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:00:50,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:00:50,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894304221] [2022-02-10 03:00:50,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:00:50,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:00:50,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:50,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:00:50,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:00:50,552 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) [2022-02-10 03:00:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:50,601 INFO L93 Difference]: Finished difference Result 34 states and 58 transitions. [2022-02-10 03:00:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:50,601 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 [2022-02-10 03:00:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:50,602 INFO L225 Difference]: With dead ends: 34 [2022-02-10 03:00:50,602 INFO L226 Difference]: Without dead ends: 33 [2022-02-10 03:00:50,602 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 [2022-02-10 03:00:50,602 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 [2022-02-10 03:00:50,603 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] [2022-02-10 03:00:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-10 03:00:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-02-10 03:00:50,604 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) [2022-02-10 03:00:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 50 transitions. [2022-02-10 03:00:50,605 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 50 transitions. Word has length 11 [2022-02-10 03:00:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:50,605 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 50 transitions. [2022-02-10 03:00:50,605 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) [2022-02-10 03:00:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 50 transitions. [2022-02-10 03:00:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:50,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:50,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:50,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-10 03:00:50,606 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:50,606 INFO L85 PathProgramCache]: Analyzing trace with hash 865278773, now seen corresponding path program 3 times [2022-02-10 03:00:50,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:50,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194630595] [2022-02-10 03:00:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:50,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:50,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:50,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194630595] [2022-02-10 03:00:50,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194630595] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:00:50,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:00:50,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:00:50,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400562695] [2022-02-10 03:00:50,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:00:50,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:00:50,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:50,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:00:50,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:00:50,660 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) [2022-02-10 03:00:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:50,706 INFO L93 Difference]: Finished difference Result 37 states and 64 transitions. [2022-02-10 03:00:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:50,707 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 [2022-02-10 03:00:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:50,707 INFO L225 Difference]: With dead ends: 37 [2022-02-10 03:00:50,708 INFO L226 Difference]: Without dead ends: 36 [2022-02-10 03:00:50,708 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 [2022-02-10 03:00:50,708 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 [2022-02-10 03:00:50,708 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] [2022-02-10 03:00:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-10 03:00:50,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-02-10 03:00:50,710 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) [2022-02-10 03:00:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 49 transitions. [2022-02-10 03:00:50,710 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 49 transitions. Word has length 11 [2022-02-10 03:00:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:50,710 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 49 transitions. [2022-02-10 03:00:50,710 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) [2022-02-10 03:00:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 49 transitions. [2022-02-10 03:00:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:50,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:50,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:50,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-10 03:00:50,711 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:50,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:50,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1777717521, now seen corresponding path program 3 times [2022-02-10 03:00:50,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:50,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926857096] [2022-02-10 03:00:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:50,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:50,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:50,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926857096] [2022-02-10 03:00:50,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926857096] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:00:50,738 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:00:50,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:00:50,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973914810] [2022-02-10 03:00:50,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:00:50,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:00:50,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:00:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:00:50,739 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) [2022-02-10 03:00:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:50,775 INFO L93 Difference]: Finished difference Result 29 states and 53 transitions. [2022-02-10 03:00:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:50,776 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 [2022-02-10 03:00:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:50,776 INFO L225 Difference]: With dead ends: 29 [2022-02-10 03:00:50,777 INFO L226 Difference]: Without dead ends: 29 [2022-02-10 03:00:50,777 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 [2022-02-10 03:00:50,778 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 [2022-02-10 03:00:50,778 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] [2022-02-10 03:00:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-10 03:00:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-02-10 03:00:50,781 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) [2022-02-10 03:00:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2022-02-10 03:00:50,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 11 [2022-02-10 03:00:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:50,781 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2022-02-10 03:00:50,781 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) [2022-02-10 03:00:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2022-02-10 03:00:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:50,782 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:50,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:50,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-10 03:00:50,783 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:50,784 INFO L85 PathProgramCache]: Analyzing trace with hash 617529755, now seen corresponding path program 4 times [2022-02-10 03:00:50,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:50,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828581742] [2022-02-10 03:00:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:50,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:50,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:50,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828581742] [2022-02-10 03:00:50,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828581742] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:50,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467161824] [2022-02-10 03:00:50,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:00:50,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:50,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:50,829 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) [2022-02-10 03:00:50,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-10 03:00:50,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:00:50,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:00:50,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:00:50,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:50,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:50,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467161824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:50,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:50,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-10 03:00:50,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159336177] [2022-02-10 03:00:50,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:50,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 03:00:50,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 03:00:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:00:50,945 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) [2022-02-10 03:00:50,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:50,985 INFO L93 Difference]: Finished difference Result 35 states and 61 transitions. [2022-02-10 03:00:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:50,985 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 [2022-02-10 03:00:50,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:50,985 INFO L225 Difference]: With dead ends: 35 [2022-02-10 03:00:50,985 INFO L226 Difference]: Without dead ends: 35 [2022-02-10 03:00:50,986 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 [2022-02-10 03:00:50,986 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 [2022-02-10 03:00:50,986 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] [2022-02-10 03:00:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-10 03:00:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2022-02-10 03:00:50,988 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) [2022-02-10 03:00:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 43 transitions. [2022-02-10 03:00:50,988 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 43 transitions. Word has length 11 [2022-02-10 03:00:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:50,988 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 43 transitions. [2022-02-10 03:00:50,988 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) [2022-02-10 03:00:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 43 transitions. [2022-02-10 03:00:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:50,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:50,988 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:51,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-10 03:00:51,204 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 [2022-02-10 03:00:51,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2019920013, now seen corresponding path program 4 times [2022-02-10 03:00:51,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:51,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150551002] [2022-02-10 03:00:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:51,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:51,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:51,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150551002] [2022-02-10 03:00:51,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150551002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:00:51,263 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:00:51,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:00:51,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181832627] [2022-02-10 03:00:51,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:00:51,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:00:51,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:51,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:00:51,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:00:51,264 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) [2022-02-10 03:00:51,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:51,299 INFO L93 Difference]: Finished difference Result 34 states and 57 transitions. [2022-02-10 03:00:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:51,300 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 [2022-02-10 03:00:51,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:51,300 INFO L225 Difference]: With dead ends: 34 [2022-02-10 03:00:51,300 INFO L226 Difference]: Without dead ends: 32 [2022-02-10 03:00:51,300 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 [2022-02-10 03:00:51,301 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 [2022-02-10 03:00:51,301 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] [2022-02-10 03:00:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-10 03:00:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-02-10 03:00:51,306 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) [2022-02-10 03:00:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 42 transitions. [2022-02-10 03:00:51,307 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 42 transitions. Word has length 11 [2022-02-10 03:00:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:51,307 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 42 transitions. [2022-02-10 03:00:51,307 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) [2022-02-10 03:00:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 42 transitions. [2022-02-10 03:00:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:51,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:51,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:51,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-10 03:00:51,308 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1491865081, now seen corresponding path program 5 times [2022-02-10 03:00:51,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:51,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687802195] [2022-02-10 03:00:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:51,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:51,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:51,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687802195] [2022-02-10 03:00:51,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687802195] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:51,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157932773] [2022-02-10 03:00:51,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:00:51,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:51,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:51,354 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) [2022-02-10 03:00:51,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-10 03:00:51,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:00:51,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:00:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:00:51,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:51,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:51,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157932773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:51,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:51,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-10 03:00:51,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233266871] [2022-02-10 03:00:51,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:51,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 03:00:51,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:51,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 03:00:51,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-10 03:00:51,479 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) [2022-02-10 03:00:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:51,516 INFO L93 Difference]: Finished difference Result 36 states and 61 transitions. [2022-02-10 03:00:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:51,517 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 [2022-02-10 03:00:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:51,517 INFO L225 Difference]: With dead ends: 36 [2022-02-10 03:00:51,517 INFO L226 Difference]: Without dead ends: 36 [2022-02-10 03:00:51,517 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 [2022-02-10 03:00:51,518 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 [2022-02-10 03:00:51,518 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] [2022-02-10 03:00:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-10 03:00:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2022-02-10 03:00:51,519 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) [2022-02-10 03:00:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 42 transitions. [2022-02-10 03:00:51,519 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 42 transitions. Word has length 11 [2022-02-10 03:00:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:51,519 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 42 transitions. [2022-02-10 03:00:51,519 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) [2022-02-10 03:00:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 42 transitions. [2022-02-10 03:00:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:51,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:51,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:51,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-10 03:00:51,735 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 [2022-02-10 03:00:51,735 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2001485987, now seen corresponding path program 5 times [2022-02-10 03:00:51,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:51,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302760492] [2022-02-10 03:00:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:51,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:51,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:51,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302760492] [2022-02-10 03:00:51,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302760492] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:00:51,767 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:00:51,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:00:51,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375336199] [2022-02-10 03:00:51,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:00:51,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:00:51,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:51,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:00:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:00:51,770 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) [2022-02-10 03:00:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:51,805 INFO L93 Difference]: Finished difference Result 33 states and 54 transitions. [2022-02-10 03:00:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:51,806 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 [2022-02-10 03:00:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:51,806 INFO L225 Difference]: With dead ends: 33 [2022-02-10 03:00:51,806 INFO L226 Difference]: Without dead ends: 32 [2022-02-10 03:00:51,806 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 [2022-02-10 03:00:51,807 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 [2022-02-10 03:00:51,807 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] [2022-02-10 03:00:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-10 03:00:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-02-10 03:00:51,808 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) [2022-02-10 03:00:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 46 transitions. [2022-02-10 03:00:51,809 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 46 transitions. Word has length 11 [2022-02-10 03:00:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:51,809 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 46 transitions. [2022-02-10 03:00:51,809 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) [2022-02-10 03:00:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 46 transitions. [2022-02-10 03:00:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:51,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:51,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:51,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-10 03:00:51,809 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:51,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1195581029, now seen corresponding path program 6 times [2022-02-10 03:00:51,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:51,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599252860] [2022-02-10 03:00:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:51,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:51,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:51,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599252860] [2022-02-10 03:00:51,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599252860] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:00:51,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:00:51,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:00:51,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255933725] [2022-02-10 03:00:51,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:00:51,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:00:51,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:00:51,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:00:51,837 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) [2022-02-10 03:00:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:51,870 INFO L93 Difference]: Finished difference Result 28 states and 50 transitions. [2022-02-10 03:00:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:51,870 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 [2022-02-10 03:00:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:51,870 INFO L225 Difference]: With dead ends: 28 [2022-02-10 03:00:51,871 INFO L226 Difference]: Without dead ends: 27 [2022-02-10 03:00:51,871 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 [2022-02-10 03:00:51,871 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 [2022-02-10 03:00:51,871 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] [2022-02-10 03:00:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-10 03:00:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-02-10 03:00:51,873 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) [2022-02-10 03:00:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 45 transitions. [2022-02-10 03:00:51,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 45 transitions. Word has length 11 [2022-02-10 03:00:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:51,873 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 45 transitions. [2022-02-10 03:00:51,873 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) [2022-02-10 03:00:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 45 transitions. [2022-02-10 03:00:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:00:51,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:51,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:51,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-10 03:00:51,874 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:51,874 INFO L85 PathProgramCache]: Analyzing trace with hash -283142281, now seen corresponding path program 6 times [2022-02-10 03:00:51,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:51,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000929983] [2022-02-10 03:00:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:51,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:51,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:51,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000929983] [2022-02-10 03:00:51,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000929983] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:00:51,900 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:00:51,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:00:51,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731378121] [2022-02-10 03:00:51,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:00:51,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:00:51,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:51,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:00:51,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:00:51,901 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) [2022-02-10 03:00:51,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:51,939 INFO L93 Difference]: Finished difference Result 25 states and 44 transitions. [2022-02-10 03:00:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:00:51,939 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 [2022-02-10 03:00:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:51,939 INFO L225 Difference]: With dead ends: 25 [2022-02-10 03:00:51,939 INFO L226 Difference]: Without dead ends: 25 [2022-02-10 03:00:51,939 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 [2022-02-10 03:00:51,940 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 [2022-02-10 03:00:51,940 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] [2022-02-10 03:00:51,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-10 03:00:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-02-10 03:00:51,941 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) [2022-02-10 03:00:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 38 transitions. [2022-02-10 03:00:51,941 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 38 transitions. Word has length 11 [2022-02-10 03:00:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:51,941 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 38 transitions. [2022-02-10 03:00:51,941 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) [2022-02-10 03:00:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 38 transitions. [2022-02-10 03:00:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 03:00:51,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:51,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:51,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-10 03:00:51,942 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1940531813, now seen corresponding path program 1 times [2022-02-10 03:00:51,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:51,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803736297] [2022-02-10 03:00:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:51,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:52,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:52,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803736297] [2022-02-10 03:00:52,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803736297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:52,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616742787] [2022-02-10 03:00:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:52,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:52,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:52,094 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) [2022-02-10 03:00:52,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 03:00:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:52,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-10 03:00:52,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:52,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:00:52,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:00:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:52,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:52,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:52,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:52,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:52,612 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 91 [2022-02-10 03:00:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:52,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616742787] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:52,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:52,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-02-10 03:00:52,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986631799] [2022-02-10 03:00:52,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:52,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:00:52,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:52,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:00:52,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:00:52,771 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) [2022-02-10 03:00:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:52,926 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2022-02-10 03:00:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-10 03:00:52,928 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 [2022-02-10 03:00:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:52,928 INFO L225 Difference]: With dead ends: 43 [2022-02-10 03:00:52,928 INFO L226 Difference]: Without dead ends: 40 [2022-02-10 03:00:52,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:00:52,929 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 [2022-02-10 03:00:52,929 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] [2022-02-10 03:00:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-10 03:00:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2022-02-10 03:00:52,931 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) [2022-02-10 03:00:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 50 transitions. [2022-02-10 03:00:52,931 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 50 transitions. Word has length 12 [2022-02-10 03:00:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:52,931 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 50 transitions. [2022-02-10 03:00:52,931 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) [2022-02-10 03:00:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 50 transitions. [2022-02-10 03:00:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 03:00:52,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:52,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:52,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-10 03:00:53,143 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 [2022-02-10 03:00:53,144 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:53,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1514371261, now seen corresponding path program 2 times [2022-02-10 03:00:53,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:53,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031041868] [2022-02-10 03:00:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:53,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:53,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:53,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031041868] [2022-02-10 03:00:53,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031041868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:53,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197127693] [2022-02-10 03:00:53,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:00:53,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:53,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:53,264 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) [2022-02-10 03:00:53,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-10 03:00:53,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:00:53,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:00:53,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-10 03:00:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:53,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:00:53,389 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 72 treesize of output 60 [2022-02-10 03:00:53,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:00:53,392 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 60 treesize of output 48 [2022-02-10 03:00:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:53,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:53,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:53,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:53,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:53,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:53,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197127693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:53,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:53,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-02-10 03:00:53,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515173292] [2022-02-10 03:00:53,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:53,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:00:53,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:00:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:00:53,790 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) [2022-02-10 03:00:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:53,933 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2022-02-10 03:00:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-10 03:00:53,933 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 [2022-02-10 03:00:53,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:53,934 INFO L225 Difference]: With dead ends: 45 [2022-02-10 03:00:53,934 INFO L226 Difference]: Without dead ends: 42 [2022-02-10 03:00:53,934 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 [2022-02-10 03:00:53,934 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 [2022-02-10 03:00:53,935 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] [2022-02-10 03:00:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-10 03:00:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2022-02-10 03:00:53,936 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) [2022-02-10 03:00:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 66 transitions. [2022-02-10 03:00:53,936 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 66 transitions. Word has length 12 [2022-02-10 03:00:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:53,936 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 66 transitions. [2022-02-10 03:00:53,937 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) [2022-02-10 03:00:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 66 transitions. [2022-02-10 03:00:53,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 03:00:53,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:53,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:53,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-10 03:00:54,147 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 [2022-02-10 03:00:54,148 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1506640863, now seen corresponding path program 3 times [2022-02-10 03:00:54,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:54,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363859554] [2022-02-10 03:00:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:54,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:54,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:54,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363859554] [2022-02-10 03:00:54,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363859554] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:54,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330605082] [2022-02-10 03:00:54,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:00:54,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:54,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:54,301 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) [2022-02-10 03:00:54,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-10 03:00:54,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:00:54,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:00:54,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-10 03:00:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:54,430 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:00:54,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:54,436 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:00:54,436 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 64 treesize of output 55 [2022-02-10 03:00:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:54,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:54,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:54,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:54,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:54,690 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 109 treesize of output 93 [2022-02-10 03:00:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:54,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330605082] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:54,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:54,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-10 03:00:54,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503268794] [2022-02-10 03:00:54,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:54,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:00:54,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:54,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:00:54,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:00:54,825 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) [2022-02-10 03:00:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:54,930 INFO L93 Difference]: Finished difference Result 41 states and 80 transitions. [2022-02-10 03:00:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-10 03:00:54,930 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 [2022-02-10 03:00:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:54,931 INFO L225 Difference]: With dead ends: 41 [2022-02-10 03:00:54,931 INFO L226 Difference]: Without dead ends: 38 [2022-02-10 03:00:54,931 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 [2022-02-10 03:00:54,931 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-02-10 03:00:54,931 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] [2022-02-10 03:00:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-10 03:00:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-02-10 03:00:54,933 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) [2022-02-10 03:00:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 69 transitions. [2022-02-10 03:00:54,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 69 transitions. Word has length 12 [2022-02-10 03:00:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:54,933 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 69 transitions. [2022-02-10 03:00:54,933 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) [2022-02-10 03:00:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 69 transitions. [2022-02-10 03:00:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 03:00:54,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:54,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:54,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-10 03:00:55,147 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 [2022-02-10 03:00:55,148 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:55,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:55,148 INFO L85 PathProgramCache]: Analyzing trace with hash 100880323, now seen corresponding path program 4 times [2022-02-10 03:00:55,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:55,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441859925] [2022-02-10 03:00:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:55,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:55,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:55,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441859925] [2022-02-10 03:00:55,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441859925] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:55,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404062020] [2022-02-10 03:00:55,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:00:55,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:55,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:55,369 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) [2022-02-10 03:00:55,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-10 03:00:55,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:00:55,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:00:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-10 03:00:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:55,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:00:55,532 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 72 treesize of output 60 [2022-02-10 03:00:55,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:00:55,534 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 60 treesize of output 48 [2022-02-10 03:00:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:55,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:55,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:55,781 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 126 [2022-02-10 03:00:55,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:55,787 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 114 treesize of output 98 [2022-02-10 03:00:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:55,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404062020] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:55,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:55,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-02-10 03:00:55,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466371735] [2022-02-10 03:00:55,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:55,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:00:55,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:55,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:00:55,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:00:55,924 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) [2022-02-10 03:00:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:56,026 INFO L93 Difference]: Finished difference Result 43 states and 81 transitions. [2022-02-10 03:00:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-10 03:00:56,026 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 [2022-02-10 03:00:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:56,026 INFO L225 Difference]: With dead ends: 43 [2022-02-10 03:00:56,026 INFO L226 Difference]: Without dead ends: 40 [2022-02-10 03:00:56,027 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 [2022-02-10 03:00:56,027 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:00:56,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-02-10 03:00:56,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-10 03:00:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-02-10 03:00:56,028 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) [2022-02-10 03:00:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 66 transitions. [2022-02-10 03:00:56,029 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 66 transitions. Word has length 12 [2022-02-10 03:00:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:56,029 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 66 transitions. [2022-02-10 03:00:56,029 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) [2022-02-10 03:00:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 66 transitions. [2022-02-10 03:00:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 03:00:56,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:56,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:56,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-10 03:00:56,239 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 [2022-02-10 03:00:56,240 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1983860283, now seen corresponding path program 5 times [2022-02-10 03:00:56,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:56,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727708668] [2022-02-10 03:00:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:56,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:56,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:56,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727708668] [2022-02-10 03:00:56,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727708668] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:56,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477884470] [2022-02-10 03:00:56,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:00:56,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:56,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:56,607 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) [2022-02-10 03:00:56,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-10 03:00:56,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:00:56,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:00:56,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:00:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:56,785 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:00:56,785 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2022-02-10 03:00:56,791 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:00:56,791 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 64 treesize of output 55 [2022-02-10 03:00:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:56,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:57,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:57,142 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 155 treesize of output 141 [2022-02-10 03:00:57,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:57,151 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 131 treesize of output 117 [2022-02-10 03:00:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:57,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477884470] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:57,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:57,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2022-02-10 03:00:57,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112209410] [2022-02-10 03:00:57,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:57,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:00:57,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:57,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:00:57,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:00:57,311 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) [2022-02-10 03:00:57,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:57,726 INFO L93 Difference]: Finished difference Result 56 states and 106 transitions. [2022-02-10 03:00:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:00:57,726 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 [2022-02-10 03:00:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:57,726 INFO L225 Difference]: With dead ends: 56 [2022-02-10 03:00:57,726 INFO L226 Difference]: Without dead ends: 53 [2022-02-10 03:00:57,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:00:57,727 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 [2022-02-10 03:00:57,727 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] [2022-02-10 03:00:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-10 03:00:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2022-02-10 03:00:57,729 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) [2022-02-10 03:00:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 73 transitions. [2022-02-10 03:00:57,729 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 73 transitions. Word has length 12 [2022-02-10 03:00:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:57,729 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 73 transitions. [2022-02-10 03:00:57,729 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) [2022-02-10 03:00:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 73 transitions. [2022-02-10 03:00:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 03:00:57,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:57,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:57,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-10 03:00:57,930 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 [2022-02-10 03:00:57,930 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:57,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:57,931 INFO L85 PathProgramCache]: Analyzing trace with hash -976515683, now seen corresponding path program 6 times [2022-02-10 03:00:57,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:57,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466656723] [2022-02-10 03:00:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:57,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:58,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:58,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466656723] [2022-02-10 03:00:58,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466656723] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:58,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255550068] [2022-02-10 03:00:58,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:00:58,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:58,046 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) [2022-02-10 03:00:58,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-10 03:00:58,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-10 03:00:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:00:58,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-10 03:00:58,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:58,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:00:58,209 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 72 treesize of output 60 [2022-02-10 03:00:58,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:00:58,212 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 60 treesize of output 48 [2022-02-10 03:00:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:58,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:58,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:58,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:58,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:58,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:58,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255550068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:58,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:58,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-02-10 03:00:58,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087314532] [2022-02-10 03:00:58,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:58,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:00:58,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:58,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:00:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:00:58,649 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) [2022-02-10 03:00:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:58,735 INFO L93 Difference]: Finished difference Result 45 states and 88 transitions. [2022-02-10 03:00:58,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-10 03:00:58,735 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 [2022-02-10 03:00:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:58,736 INFO L225 Difference]: With dead ends: 45 [2022-02-10 03:00:58,736 INFO L226 Difference]: Without dead ends: 42 [2022-02-10 03:00:58,736 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 [2022-02-10 03:00:58,736 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 [2022-02-10 03:00:58,737 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] [2022-02-10 03:00:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-10 03:00:58,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-02-10 03:00:58,738 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) [2022-02-10 03:00:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 73 transitions. [2022-02-10 03:00:58,738 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 73 transitions. Word has length 12 [2022-02-10 03:00:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:58,738 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 73 transitions. [2022-02-10 03:00:58,738 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) [2022-02-10 03:00:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 73 transitions. [2022-02-10 03:00:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 03:00:58,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:58,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:58,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-10 03:00:58,939 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 [2022-02-10 03:00:58,939 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash -968785285, now seen corresponding path program 7 times [2022-02-10 03:00:58,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:58,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411609411] [2022-02-10 03:00:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:58,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:59,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:00:59,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411609411] [2022-02-10 03:00:59,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411609411] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:00:59,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223146523] [2022-02-10 03:00:59,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:00:59,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:00:59,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:00:59,074 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) [2022-02-10 03:00:59,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-10 03:00:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:00:59,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-10 03:00:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:00:59,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:00:59,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:59,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:00:59,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:59,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:00:59,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:59,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:59,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:00:59,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:00:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:00:59,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223146523] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:00:59,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:00:59,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-10 03:00:59,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453870912] [2022-02-10 03:00:59,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:00:59,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:00:59,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:00:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:00:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:00:59,571 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) [2022-02-10 03:00:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:00:59,730 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2022-02-10 03:00:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-10 03:00:59,731 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 [2022-02-10 03:00:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:00:59,731 INFO L225 Difference]: With dead ends: 59 [2022-02-10 03:00:59,731 INFO L226 Difference]: Without dead ends: 53 [2022-02-10 03:00:59,731 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 [2022-02-10 03:00:59,732 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 [2022-02-10 03:00:59,732 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] [2022-02-10 03:00:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-10 03:00:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2022-02-10 03:00:59,733 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) [2022-02-10 03:00:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 86 transitions. [2022-02-10 03:00:59,734 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 86 transitions. Word has length 12 [2022-02-10 03:00:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:00:59,734 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 86 transitions. [2022-02-10 03:00:59,734 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) [2022-02-10 03:00:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 86 transitions. [2022-02-10 03:00:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:00:59,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:00:59,734 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:00:59,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-10 03:00:59,951 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 [2022-02-10 03:00:59,951 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:00:59,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:00:59,952 INFO L85 PathProgramCache]: Analyzing trace with hash -6313097, now seen corresponding path program 8 times [2022-02-10 03:00:59,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:00:59,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447571539] [2022-02-10 03:00:59,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:00:59,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:00:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:00,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:00,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447571539] [2022-02-10 03:01:00,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447571539] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:00,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679756913] [2022-02-10 03:01:00,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:01:00,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:00,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:00,016 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) [2022-02-10 03:01:00,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-10 03:01:00,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:00,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:00,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:00,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:00,133 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 37 treesize of output 31 [2022-02-10 03:01:00,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:00,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:00,232 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:00,233 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-10 03:01:00,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:00,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679756913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:00,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:00,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-10 03:01:00,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697687600] [2022-02-10 03:01:00,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:00,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 03:01:00,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 03:01:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-10 03:01:00,262 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) [2022-02-10 03:01:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:00,435 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2022-02-10 03:01:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:00,435 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 [2022-02-10 03:01:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:00,435 INFO L225 Difference]: With dead ends: 57 [2022-02-10 03:01:00,436 INFO L226 Difference]: Without dead ends: 54 [2022-02-10 03:01:00,436 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 [2022-02-10 03:01:00,438 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-02-10 03:01:00,438 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] [2022-02-10 03:01:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-10 03:01:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2022-02-10 03:01:00,443 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) [2022-02-10 03:01:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 84 transitions. [2022-02-10 03:01:00,443 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 84 transitions. Word has length 13 [2022-02-10 03:01:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:00,443 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 84 transitions. [2022-02-10 03:01:00,444 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) [2022-02-10 03:01:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 84 transitions. [2022-02-10 03:01:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:00,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:00,444 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:00,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:00,647 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 [2022-02-10 03:01:00,647 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:00,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1891924615, now seen corresponding path program 9 times [2022-02-10 03:01:00,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:00,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565214415] [2022-02-10 03:01:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:00,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:00,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:00,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565214415] [2022-02-10 03:01:00,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565214415] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:00,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254517605] [2022-02-10 03:01:00,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:01:00,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:00,712 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) [2022-02-10 03:01:00,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-10 03:01:00,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:01:00,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:00,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:00,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:00,817 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 7 treesize of output 1 [2022-02-10 03:01:00,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:00,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:00,911 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:00,911 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:01:00,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:00,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254517605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:00,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:00,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-10 03:01:00,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586115437] [2022-02-10 03:01:00,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:00,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 03:01:00,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:00,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 03:01:00,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-10 03:01:00,919 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) [2022-02-10 03:01:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:01,070 INFO L93 Difference]: Finished difference Result 58 states and 121 transitions. [2022-02-10 03:01:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-10 03:01:01,070 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 [2022-02-10 03:01:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:01,071 INFO L225 Difference]: With dead ends: 58 [2022-02-10 03:01:01,071 INFO L226 Difference]: Without dead ends: 58 [2022-02-10 03:01:01,071 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 [2022-02-10 03:01:01,071 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 [2022-02-10 03:01:01,071 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] [2022-02-10 03:01:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-10 03:01:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2022-02-10 03:01:01,076 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) [2022-02-10 03:01:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 87 transitions. [2022-02-10 03:01:01,076 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 87 transitions. Word has length 13 [2022-02-10 03:01:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:01,077 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 87 transitions. [2022-02-10 03:01:01,077 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) [2022-02-10 03:01:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 87 transitions. [2022-02-10 03:01:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:01,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:01,077 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:01,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-10 03:01:01,281 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 [2022-02-10 03:01:01,282 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1853476621, now seen corresponding path program 10 times [2022-02-10 03:01:01,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:01,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907657297] [2022-02-10 03:01:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:01,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:01,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:01,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907657297] [2022-02-10 03:01:01,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907657297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:01,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324618684] [2022-02-10 03:01:01,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:01:01,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:01,348 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) [2022-02-10 03:01:01,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-10 03:01:01,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:01:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:01,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:01,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:01,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:01,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:01,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:01,457 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 35 treesize of output 27 [2022-02-10 03:01:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:01,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:01,593 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:01,593 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 38 treesize of output 31 [2022-02-10 03:01:01,595 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 21 treesize of output 13 [2022-02-10 03:01:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:01,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324618684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:01,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:01,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-10 03:01:01,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781164633] [2022-02-10 03:01:01,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:01,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:01:01,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:01,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:01:01,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:01:01,608 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) [2022-02-10 03:01:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:01,870 INFO L93 Difference]: Finished difference Result 96 states and 176 transitions. [2022-02-10 03:01:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:01:01,870 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 [2022-02-10 03:01:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:01,872 INFO L225 Difference]: With dead ends: 96 [2022-02-10 03:01:01,872 INFO L226 Difference]: Without dead ends: 96 [2022-02-10 03:01:01,872 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 [2022-02-10 03:01:01,873 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 [2022-02-10 03:01:01,874 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] [2022-02-10 03:01:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-10 03:01:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 44. [2022-02-10 03:01:01,877 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) [2022-02-10 03:01:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 102 transitions. [2022-02-10 03:01:01,877 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 102 transitions. Word has length 13 [2022-02-10 03:01:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:01,877 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 102 transitions. [2022-02-10 03:01:01,877 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) [2022-02-10 03:01:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 102 transitions. [2022-02-10 03:01:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:01,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:01,878 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:01,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:02,091 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 [2022-02-10 03:01:02,092 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:02,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1051860393, now seen corresponding path program 11 times [2022-02-10 03:01:02,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:02,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923846094] [2022-02-10 03:01:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:02,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:02,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:02,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923846094] [2022-02-10 03:01:02,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923846094] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:02,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292732645] [2022-02-10 03:01:02,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:01:02,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:02,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:02,164 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) [2022-02-10 03:01:02,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-10 03:01:02,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:01:02,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:02,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:02,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:02,262 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 [2022-02-10 03:01:02,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:02,264 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 [2022-02-10 03:01:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:02,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:02,423 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:02,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:02,424 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 9 treesize of output 7 [2022-02-10 03:01:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:02,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292732645] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:02,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:02,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-10 03:01:02,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374682460] [2022-02-10 03:01:02,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:02,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:01:02,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:01:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:01:02,431 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) [2022-02-10 03:01:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:02,839 INFO L93 Difference]: Finished difference Result 93 states and 177 transitions. [2022-02-10 03:01:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:01:02,840 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 [2022-02-10 03:01:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:02,840 INFO L225 Difference]: With dead ends: 93 [2022-02-10 03:01:02,840 INFO L226 Difference]: Without dead ends: 90 [2022-02-10 03:01:02,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:01:02,841 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 [2022-02-10 03:01:02,841 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] [2022-02-10 03:01:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-10 03:01:02,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 48. [2022-02-10 03:01:02,842 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) [2022-02-10 03:01:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2022-02-10 03:01:02,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2022-02-10 03:01:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:02,843 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2022-02-10 03:01:02,843 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) [2022-02-10 03:01:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2022-02-10 03:01:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:02,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:02,843 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:02,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:03,059 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 [2022-02-10 03:01:03,059 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash 666483313, now seen corresponding path program 12 times [2022-02-10 03:01:03,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:03,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655872896] [2022-02-10 03:01:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:03,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:03,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:03,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655872896] [2022-02-10 03:01:03,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655872896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:03,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529575756] [2022-02-10 03:01:03,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:01:03,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:03,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:03,133 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) [2022-02-10 03:01:03,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-10 03:01:03,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:01:03,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:03,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:03,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:03,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:03,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:03,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:03,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:03,365 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:03,366 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 24 treesize of output 21 [2022-02-10 03:01:03,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:03,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529575756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:03,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:03,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-10 03:01:03,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798759762] [2022-02-10 03:01:03,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:01:03,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:01:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:01:03,377 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) [2022-02-10 03:01:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:03,754 INFO L93 Difference]: Finished difference Result 91 states and 178 transitions. [2022-02-10 03:01:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:01:03,755 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 [2022-02-10 03:01:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:03,756 INFO L225 Difference]: With dead ends: 91 [2022-02-10 03:01:03,756 INFO L226 Difference]: Without dead ends: 91 [2022-02-10 03:01:03,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:01:03,756 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 [2022-02-10 03:01:03,757 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] [2022-02-10 03:01:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-10 03:01:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2022-02-10 03:01:03,759 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) [2022-02-10 03:01:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 106 transitions. [2022-02-10 03:01:03,760 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 106 transitions. Word has length 13 [2022-02-10 03:01:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:03,761 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 106 transitions. [2022-02-10 03:01:03,761 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) [2022-02-10 03:01:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 106 transitions. [2022-02-10 03:01:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:03,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:03,761 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:03,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:03,963 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 [2022-02-10 03:01:03,963 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:03,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1044129995, now seen corresponding path program 13 times [2022-02-10 03:01:03,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:03,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948286657] [2022-02-10 03:01:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:03,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:04,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:04,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948286657] [2022-02-10 03:01:04,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948286657] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:04,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630949084] [2022-02-10 03:01:04,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:01:04,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:04,027 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) [2022-02-10 03:01:04,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-10 03:01:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:04,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:04,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:04,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:04,143 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 29 treesize of output 23 [2022-02-10 03:01:04,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:04,146 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:01:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:04,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:04,251 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:04,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:04,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:04,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630949084] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:04,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:04,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-10 03:01:04,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855348995] [2022-02-10 03:01:04,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:04,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:01:04,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:01:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:01:04,260 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) [2022-02-10 03:01:04,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:04,407 INFO L93 Difference]: Finished difference Result 78 states and 169 transitions. [2022-02-10 03:01:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:04,408 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 [2022-02-10 03:01:04,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:04,408 INFO L225 Difference]: With dead ends: 78 [2022-02-10 03:01:04,408 INFO L226 Difference]: Without dead ends: 78 [2022-02-10 03:01:04,408 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 [2022-02-10 03:01:04,409 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-10 03:01:04,409 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] [2022-02-10 03:01:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-10 03:01:04,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2022-02-10 03:01:04,410 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) [2022-02-10 03:01:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 112 transitions. [2022-02-10 03:01:04,410 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 112 transitions. Word has length 13 [2022-02-10 03:01:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:04,410 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 112 transitions. [2022-02-10 03:01:04,411 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) [2022-02-10 03:01:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 112 transitions. [2022-02-10 03:01:04,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:04,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:04,411 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:04,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-10 03:01:04,627 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 [2022-02-10 03:01:04,627 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:04,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1239138935, now seen corresponding path program 14 times [2022-02-10 03:01:04,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:04,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933278933] [2022-02-10 03:01:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:04,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:04,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:04,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933278933] [2022-02-10 03:01:04,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933278933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:04,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887704451] [2022-02-10 03:01:04,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:01:04,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:04,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:04,679 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) [2022-02-10 03:01:04,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-10 03:01:04,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:04,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:04,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:04,791 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:01:04,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:04,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:04,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:04,798 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 8 treesize of output 1 [2022-02-10 03:01:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:04,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:04,905 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:04,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:04,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:04,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887704451] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:04,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:04,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:04,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749974901] [2022-02-10 03:01:04,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:04,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:04,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:04,919 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) [2022-02-10 03:01:05,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:05,034 INFO L93 Difference]: Finished difference Result 77 states and 159 transitions. [2022-02-10 03:01:05,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:05,034 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 [2022-02-10 03:01:05,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:05,035 INFO L225 Difference]: With dead ends: 77 [2022-02-10 03:01:05,035 INFO L226 Difference]: Without dead ends: 77 [2022-02-10 03:01:05,036 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 [2022-02-10 03:01:05,036 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 [2022-02-10 03:01:05,036 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] [2022-02-10 03:01:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-10 03:01:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-02-10 03:01:05,038 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) [2022-02-10 03:01:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2022-02-10 03:01:05,038 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 13 [2022-02-10 03:01:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:05,038 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2022-02-10 03:01:05,038 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) [2022-02-10 03:01:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2022-02-10 03:01:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:05,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:05,038 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:05,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:05,255 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 [2022-02-10 03:01:05,255 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash 319438227, now seen corresponding path program 15 times [2022-02-10 03:01:05,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:05,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479198472] [2022-02-10 03:01:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:05,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:05,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:05,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479198472] [2022-02-10 03:01:05,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479198472] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:05,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926598518] [2022-02-10 03:01:05,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:01:05,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:05,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:05,308 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) [2022-02-10 03:01:05,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-10 03:01:05,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:01:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:05,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:05,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:05,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:05,422 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-10 03:01:05,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:05,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:05,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:05,530 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:05,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:05,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:05,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926598518] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:05,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:05,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:05,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526769533] [2022-02-10 03:01:05,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:05,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:05,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:05,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:05,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:05,545 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) [2022-02-10 03:01:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:05,720 INFO L93 Difference]: Finished difference Result 68 states and 143 transitions. [2022-02-10 03:01:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:01:05,721 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 [2022-02-10 03:01:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:05,721 INFO L225 Difference]: With dead ends: 68 [2022-02-10 03:01:05,721 INFO L226 Difference]: Without dead ends: 65 [2022-02-10 03:01:05,722 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 [2022-02-10 03:01:05,722 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 [2022-02-10 03:01:05,722 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] [2022-02-10 03:01:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-10 03:01:05,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2022-02-10 03:01:05,723 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) [2022-02-10 03:01:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 126 transitions. [2022-02-10 03:01:05,724 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 126 transitions. Word has length 13 [2022-02-10 03:01:05,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:05,724 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 126 transitions. [2022-02-10 03:01:05,724 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) [2022-02-10 03:01:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 126 transitions. [2022-02-10 03:01:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:05,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:05,724 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:05,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:05,945 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 [2022-02-10 03:01:05,945 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:05,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1246869333, now seen corresponding path program 16 times [2022-02-10 03:01:05,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:05,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824826025] [2022-02-10 03:01:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:05,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:06,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:06,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824826025] [2022-02-10 03:01:06,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824826025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:06,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252354589] [2022-02-10 03:01:06,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:01:06,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:06,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:06,015 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) [2022-02-10 03:01:06,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-10 03:01:06,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:01:06,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:06,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:06,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:06,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:06,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:06,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:06,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:06,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:06,248 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:06,248 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 [2022-02-10 03:01:06,250 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 [2022-02-10 03:01:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:06,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252354589] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:06,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:06,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:06,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140822690] [2022-02-10 03:01:06,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:06,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:06,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:06,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:06,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:06,263 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) [2022-02-10 03:01:06,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:06,421 INFO L93 Difference]: Finished difference Result 88 states and 171 transitions. [2022-02-10 03:01:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:06,421 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 [2022-02-10 03:01:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:06,422 INFO L225 Difference]: With dead ends: 88 [2022-02-10 03:01:06,422 INFO L226 Difference]: Without dead ends: 87 [2022-02-10 03:01:06,422 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 [2022-02-10 03:01:06,423 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 [2022-02-10 03:01:06,423 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] [2022-02-10 03:01:06,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-10 03:01:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 54. [2022-02-10 03:01:06,425 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) [2022-02-10 03:01:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2022-02-10 03:01:06,425 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 13 [2022-02-10 03:01:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:06,425 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2022-02-10 03:01:06,425 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) [2022-02-10 03:01:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2022-02-10 03:01:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:06,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:06,426 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:06,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:06,639 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 [2022-02-10 03:01:06,639 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:06,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2048485561, now seen corresponding path program 17 times [2022-02-10 03:01:06,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:06,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555461941] [2022-02-10 03:01:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:06,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:06,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:06,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555461941] [2022-02-10 03:01:06,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555461941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:06,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112430928] [2022-02-10 03:01:06,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:01:06,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:06,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:06,704 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) [2022-02-10 03:01:06,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-10 03:01:06,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:06,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:06,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:06,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:06,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:06,785 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 43 treesize of output 35 [2022-02-10 03:01:06,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:06,787 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 35 treesize of output 27 [2022-02-10 03:01:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:06,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:06,899 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:06,900 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:01:06,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:06,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112430928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:06,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:06,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:06,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117283391] [2022-02-10 03:01:06,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:06,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:06,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:06,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:06,916 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) [2022-02-10 03:01:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:07,071 INFO L93 Difference]: Finished difference Result 73 states and 152 transitions. [2022-02-10 03:01:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:01:07,072 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 [2022-02-10 03:01:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:07,072 INFO L225 Difference]: With dead ends: 73 [2022-02-10 03:01:07,072 INFO L226 Difference]: Without dead ends: 70 [2022-02-10 03:01:07,072 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 [2022-02-10 03:01:07,073 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 [2022-02-10 03:01:07,073 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] [2022-02-10 03:01:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-10 03:01:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2022-02-10 03:01:07,074 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) [2022-02-10 03:01:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 128 transitions. [2022-02-10 03:01:07,074 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 128 transitions. Word has length 13 [2022-02-10 03:01:07,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:07,074 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 128 transitions. [2022-02-10 03:01:07,074 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) [2022-02-10 03:01:07,075 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 128 transitions. [2022-02-10 03:01:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:07,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:07,075 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:07,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:07,275 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 [2022-02-10 03:01:07,275 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash -528138029, now seen corresponding path program 18 times [2022-02-10 03:01:07,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:07,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438758960] [2022-02-10 03:01:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:07,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:07,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:07,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438758960] [2022-02-10 03:01:07,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438758960] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:07,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451654250] [2022-02-10 03:01:07,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:01:07,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:07,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:07,331 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) [2022-02-10 03:01:07,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-10 03:01:07,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:01:07,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:07,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:07,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:07,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:07,443 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 43 treesize of output 35 [2022-02-10 03:01:07,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:07,445 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 35 treesize of output 27 [2022-02-10 03:01:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:07,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:07,561 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:07,562 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:01:07,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:07,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451654250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:07,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:07,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:07,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622789189] [2022-02-10 03:01:07,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:07,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:07,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:07,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:07,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:07,579 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) [2022-02-10 03:01:07,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:07,694 INFO L93 Difference]: Finished difference Result 66 states and 146 transitions. [2022-02-10 03:01:07,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:01:07,694 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 [2022-02-10 03:01:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:07,694 INFO L225 Difference]: With dead ends: 66 [2022-02-10 03:01:07,694 INFO L226 Difference]: Without dead ends: 66 [2022-02-10 03:01:07,695 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 [2022-02-10 03:01:07,695 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 [2022-02-10 03:01:07,695 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] [2022-02-10 03:01:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-10 03:01:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2022-02-10 03:01:07,696 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) [2022-02-10 03:01:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 124 transitions. [2022-02-10 03:01:07,696 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 124 transitions. Word has length 13 [2022-02-10 03:01:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:07,697 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 124 transitions. [2022-02-10 03:01:07,697 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) [2022-02-10 03:01:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 124 transitions. [2022-02-10 03:01:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:07,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:07,697 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:07,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-10 03:01:07,913 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 [2022-02-10 03:01:07,913 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash -242535663, now seen corresponding path program 19 times [2022-02-10 03:01:07,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:07,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201761811] [2022-02-10 03:01:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:07,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:07,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:07,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201761811] [2022-02-10 03:01:07,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201761811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:07,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838887388] [2022-02-10 03:01:07,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:01:07,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:07,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:07,977 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) [2022-02-10 03:01:07,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-10 03:01:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:07,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:07,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:08,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:08,064 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 43 treesize of output 35 [2022-02-10 03:01:08,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:08,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:08,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:08,194 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:08,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:08,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:08,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838887388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:08,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:08,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:08,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307592372] [2022-02-10 03:01:08,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:08,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:08,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:08,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:08,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:08,213 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) [2022-02-10 03:01:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:08,352 INFO L93 Difference]: Finished difference Result 94 states and 183 transitions. [2022-02-10 03:01:08,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:01:08,353 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 [2022-02-10 03:01:08,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:08,353 INFO L225 Difference]: With dead ends: 94 [2022-02-10 03:01:08,353 INFO L226 Difference]: Without dead ends: 94 [2022-02-10 03:01:08,353 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 [2022-02-10 03:01:08,354 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 [2022-02-10 03:01:08,354 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] [2022-02-10 03:01:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-10 03:01:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 57. [2022-02-10 03:01:08,355 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) [2022-02-10 03:01:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 136 transitions. [2022-02-10 03:01:08,355 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 136 transitions. Word has length 13 [2022-02-10 03:01:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:08,356 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 136 transitions. [2022-02-10 03:01:08,356 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) [2022-02-10 03:01:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 136 transitions. [2022-02-10 03:01:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:08,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:08,356 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:08,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:08,563 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 [2022-02-10 03:01:08,563 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash 559080565, now seen corresponding path program 20 times [2022-02-10 03:01:08,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:08,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505600610] [2022-02-10 03:01:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:08,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:08,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:08,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505600610] [2022-02-10 03:01:08,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505600610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:08,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970639567] [2022-02-10 03:01:08,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:01:08,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:08,619 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) [2022-02-10 03:01:08,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-10 03:01:08,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:08,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:08,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:08,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:08,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:08,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:08,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:08,707 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 [2022-02-10 03:01:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:08,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:08,823 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:08,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:08,825 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 [2022-02-10 03:01:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:08,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970639567] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:08,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:08,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:08,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875036670] [2022-02-10 03:01:08,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:08,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:08,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:08,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:08,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:08,834 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) [2022-02-10 03:01:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:09,093 INFO L93 Difference]: Finished difference Result 89 states and 178 transitions. [2022-02-10 03:01:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:01:09,094 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 [2022-02-10 03:01:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:09,095 INFO L225 Difference]: With dead ends: 89 [2022-02-10 03:01:09,095 INFO L226 Difference]: Without dead ends: 86 [2022-02-10 03:01:09,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:01:09,095 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 [2022-02-10 03:01:09,096 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] [2022-02-10 03:01:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-10 03:01:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2022-02-10 03:01:09,097 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) [2022-02-10 03:01:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 144 transitions. [2022-02-10 03:01:09,097 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 144 transitions. Word has length 13 [2022-02-10 03:01:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:09,097 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 144 transitions. [2022-02-10 03:01:09,097 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) [2022-02-10 03:01:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 144 transitions. [2022-02-10 03:01:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:09,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:09,098 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:09,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-10 03:01:09,314 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 [2022-02-10 03:01:09,315 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:09,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:09,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2017543025, now seen corresponding path program 21 times [2022-02-10 03:01:09,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:09,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273518576] [2022-02-10 03:01:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:09,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:09,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:09,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273518576] [2022-02-10 03:01:09,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273518576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:09,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210582352] [2022-02-10 03:01:09,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:01:09,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:09,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:09,387 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) [2022-02-10 03:01:09,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-10 03:01:09,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:01:09,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:09,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:09,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:09,484 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 [2022-02-10 03:01:09,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:09,487 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 35 treesize of output 27 [2022-02-10 03:01:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:09,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:09,602 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:09,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:09,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:09,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210582352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:09,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:09,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:09,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070985708] [2022-02-10 03:01:09,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:09,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:09,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:09,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:09,613 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) [2022-02-10 03:01:09,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:09,802 INFO L93 Difference]: Finished difference Result 76 states and 164 transitions. [2022-02-10 03:01:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:09,803 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 [2022-02-10 03:01:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:09,803 INFO L225 Difference]: With dead ends: 76 [2022-02-10 03:01:09,803 INFO L226 Difference]: Without dead ends: 76 [2022-02-10 03:01:09,804 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 [2022-02-10 03:01:09,804 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 [2022-02-10 03:01:09,804 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] [2022-02-10 03:01:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-10 03:01:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2022-02-10 03:01:09,805 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) [2022-02-10 03:01:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 123 transitions. [2022-02-10 03:01:09,806 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 123 transitions. Word has length 13 [2022-02-10 03:01:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:09,806 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 123 transitions. [2022-02-10 03:01:09,806 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) [2022-02-10 03:01:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 123 transitions. [2022-02-10 03:01:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:09,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:09,806 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:09,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:10,015 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 [2022-02-10 03:01:10,015 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:10,016 INFO L85 PathProgramCache]: Analyzing trace with hash 566810963, now seen corresponding path program 22 times [2022-02-10 03:01:10,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:10,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144512533] [2022-02-10 03:01:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:10,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:10,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:10,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144512533] [2022-02-10 03:01:10,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144512533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:10,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72848740] [2022-02-10 03:01:10,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:01:10,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:10,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:10,071 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) [2022-02-10 03:01:10,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-10 03:01:10,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:01:10,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:10,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:10,175 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 29 treesize of output 23 [2022-02-10 03:01:10,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:10,178 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:01:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:10,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:10,263 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:10,263 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:01:10,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:10,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72848740] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:10,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:10,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:10,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345384492] [2022-02-10 03:01:10,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:10,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:10,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:10,275 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) [2022-02-10 03:01:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:10,371 INFO L93 Difference]: Finished difference Result 74 states and 164 transitions. [2022-02-10 03:01:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:01:10,371 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 [2022-02-10 03:01:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:10,372 INFO L225 Difference]: With dead ends: 74 [2022-02-10 03:01:10,372 INFO L226 Difference]: Without dead ends: 74 [2022-02-10 03:01:10,372 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 [2022-02-10 03:01:10,372 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 [2022-02-10 03:01:10,372 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] [2022-02-10 03:01:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-10 03:01:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2022-02-10 03:01:10,373 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) [2022-02-10 03:01:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2022-02-10 03:01:10,374 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 13 [2022-02-10 03:01:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:10,374 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2022-02-10 03:01:10,374 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) [2022-02-10 03:01:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2022-02-10 03:01:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:10,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:10,374 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:10,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-10 03:01:10,588 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 [2022-02-10 03:01:10,588 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:10,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:10,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1546997875, now seen corresponding path program 23 times [2022-02-10 03:01:10,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:10,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796993582] [2022-02-10 03:01:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:10,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:10,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:10,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796993582] [2022-02-10 03:01:10,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796993582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:10,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076274606] [2022-02-10 03:01:10,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:01:10,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:10,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:10,643 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) [2022-02-10 03:01:10,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-10 03:01:10,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:10,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:10,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:10,736 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:01:10,739 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-10 03:01:10,741 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 8 treesize of output 1 [2022-02-10 03:01:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:10,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:10,842 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:10,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:10,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:10,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076274606] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:10,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:10,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-10 03:01:10,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123339764] [2022-02-10 03:01:10,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:10,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 03:01:10,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:10,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 03:01:10,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-10 03:01:10,851 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) [2022-02-10 03:01:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:10,971 INFO L93 Difference]: Finished difference Result 77 states and 166 transitions. [2022-02-10 03:01:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-10 03:01:10,972 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 [2022-02-10 03:01:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:10,972 INFO L225 Difference]: With dead ends: 77 [2022-02-10 03:01:10,972 INFO L226 Difference]: Without dead ends: 77 [2022-02-10 03:01:10,972 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 [2022-02-10 03:01:10,973 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 [2022-02-10 03:01:10,973 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] [2022-02-10 03:01:10,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-10 03:01:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2022-02-10 03:01:10,974 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) [2022-02-10 03:01:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 127 transitions. [2022-02-10 03:01:10,974 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 127 transitions. Word has length 13 [2022-02-10 03:01:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:10,974 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 127 transitions. [2022-02-10 03:01:10,974 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) [2022-02-10 03:01:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 127 transitions. [2022-02-10 03:01:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:10,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:10,975 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:10,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:11,191 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 [2022-02-10 03:01:11,191 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:11,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1390433691, now seen corresponding path program 24 times [2022-02-10 03:01:11,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:11,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61600819] [2022-02-10 03:01:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:11,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:11,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:11,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61600819] [2022-02-10 03:01:11,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61600819] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:11,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859990971] [2022-02-10 03:01:11,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:01:11,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:11,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:11,248 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) [2022-02-10 03:01:11,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-10 03:01:11,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-10 03:01:11,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:11,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:11,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:11,348 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 37 treesize of output 31 [2022-02-10 03:01:11,350 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 31 treesize of output 25 [2022-02-10 03:01:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:11,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:11,433 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:11,433 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 38 treesize of output 31 [2022-02-10 03:01:11,435 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 [2022-02-10 03:01:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:11,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859990971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:11,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:11,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-10 03:01:11,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280523042] [2022-02-10 03:01:11,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:11,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 03:01:11,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:11,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 03:01:11,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-10 03:01:11,446 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) [2022-02-10 03:01:11,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:11,625 INFO L93 Difference]: Finished difference Result 75 states and 159 transitions. [2022-02-10 03:01:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:11,625 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 [2022-02-10 03:01:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:11,625 INFO L225 Difference]: With dead ends: 75 [2022-02-10 03:01:11,625 INFO L226 Difference]: Without dead ends: 72 [2022-02-10 03:01:11,626 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 [2022-02-10 03:01:11,626 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 [2022-02-10 03:01:11,626 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] [2022-02-10 03:01:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-10 03:01:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2022-02-10 03:01:11,627 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) [2022-02-10 03:01:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 126 transitions. [2022-02-10 03:01:11,627 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 126 transitions. Word has length 13 [2022-02-10 03:01:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:11,627 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 126 transitions. [2022-02-10 03:01:11,628 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) [2022-02-10 03:01:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 126 transitions. [2022-02-10 03:01:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:11,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:11,628 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:11,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-10 03:01:11,840 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 [2022-02-10 03:01:11,841 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:11,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1413378091, now seen corresponding path program 25 times [2022-02-10 03:01:11,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:11,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358041785] [2022-02-10 03:01:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:11,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:11,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:11,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358041785] [2022-02-10 03:01:11,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358041785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:11,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689872631] [2022-02-10 03:01:11,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:01:11,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:11,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:11,891 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) [2022-02-10 03:01:11,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-10 03:01:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:11,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:12,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:12,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:12,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:12,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:12,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:12,122 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:12,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:12,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:12,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689872631] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:12,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:12,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-10 03:01:12,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071235414] [2022-02-10 03:01:12,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:12,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:01:12,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:12,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:01:12,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:01:12,131 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) [2022-02-10 03:01:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:12,292 INFO L93 Difference]: Finished difference Result 88 states and 188 transitions. [2022-02-10 03:01:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:12,292 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 [2022-02-10 03:01:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:12,292 INFO L225 Difference]: With dead ends: 88 [2022-02-10 03:01:12,292 INFO L226 Difference]: Without dead ends: 88 [2022-02-10 03:01:12,293 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 [2022-02-10 03:01:12,293 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 [2022-02-10 03:01:12,293 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] [2022-02-10 03:01:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-10 03:01:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2022-02-10 03:01:12,294 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) [2022-02-10 03:01:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 129 transitions. [2022-02-10 03:01:12,295 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 129 transitions. Word has length 13 [2022-02-10 03:01:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:12,295 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 129 transitions. [2022-02-10 03:01:12,295 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) [2022-02-10 03:01:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 129 transitions. [2022-02-10 03:01:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:12,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:12,295 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:12,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-10 03:01:12,511 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 [2022-02-10 03:01:12,511 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:12,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1961888497, now seen corresponding path program 26 times [2022-02-10 03:01:12,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:12,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284882683] [2022-02-10 03:01:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:12,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:12,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:12,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284882683] [2022-02-10 03:01:12,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284882683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:12,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856528980] [2022-02-10 03:01:12,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:01:12,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:12,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:12,573 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) [2022-02-10 03:01:12,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-10 03:01:12,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:12,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:12,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:12,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:12,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:12,695 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 37 treesize of output 31 [2022-02-10 03:01:12,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:12,698 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 31 treesize of output 25 [2022-02-10 03:01:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:12,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:12,819 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:12,820 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-10 03:01:12,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:12,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856528980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:12,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:12,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-10 03:01:12,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137566166] [2022-02-10 03:01:12,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:12,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:01:12,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:12,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:01:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:01:12,832 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) [2022-02-10 03:01:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:13,030 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2022-02-10 03:01:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:01:13,031 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 [2022-02-10 03:01:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:13,031 INFO L225 Difference]: With dead ends: 77 [2022-02-10 03:01:13,031 INFO L226 Difference]: Without dead ends: 75 [2022-02-10 03:01:13,031 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 [2022-02-10 03:01:13,032 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 [2022-02-10 03:01:13,032 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] [2022-02-10 03:01:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-10 03:01:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2022-02-10 03:01:13,033 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) [2022-02-10 03:01:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2022-02-10 03:01:13,033 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 13 [2022-02-10 03:01:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:13,033 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2022-02-10 03:01:13,033 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) [2022-02-10 03:01:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2022-02-10 03:01:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:13,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:13,034 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:13,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-10 03:01:13,239 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 [2022-02-10 03:01:13,239 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:13,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1405647693, now seen corresponding path program 27 times [2022-02-10 03:01:13,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:13,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954953334] [2022-02-10 03:01:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:13,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:13,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:13,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954953334] [2022-02-10 03:01:13,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954953334] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:13,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403349719] [2022-02-10 03:01:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:01:13,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:13,312 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) [2022-02-10 03:01:13,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-10 03:01:13,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:01:13,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:13,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:13,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:13,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:13,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:13,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:13,398 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:01:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:13,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:13,528 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:13,528 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:01:13,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:13,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403349719] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:13,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:13,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-10 03:01:13,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620963204] [2022-02-10 03:01:13,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:13,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:01:13,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:01:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:01:13,536 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) [2022-02-10 03:01:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:13,886 INFO L93 Difference]: Finished difference Result 116 states and 222 transitions. [2022-02-10 03:01:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:01:13,886 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 [2022-02-10 03:01:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:13,887 INFO L225 Difference]: With dead ends: 116 [2022-02-10 03:01:13,887 INFO L226 Difference]: Without dead ends: 116 [2022-02-10 03:01:13,887 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 [2022-02-10 03:01:13,887 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 [2022-02-10 03:01:13,887 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] [2022-02-10 03:01:13,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-10 03:01:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 59. [2022-02-10 03:01:13,889 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) [2022-02-10 03:01:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 139 transitions. [2022-02-10 03:01:13,889 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 139 transitions. Word has length 13 [2022-02-10 03:01:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:13,889 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 139 transitions. [2022-02-10 03:01:13,889 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) [2022-02-10 03:01:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 139 transitions. [2022-02-10 03:01:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:13,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:13,890 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:13,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:14,103 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 [2022-02-10 03:01:14,103 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash -604031465, now seen corresponding path program 28 times [2022-02-10 03:01:14,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:14,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5991885] [2022-02-10 03:01:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:14,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:14,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:14,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5991885] [2022-02-10 03:01:14,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5991885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:14,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571816424] [2022-02-10 03:01:14,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:01:14,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:14,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:14,166 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) [2022-02-10 03:01:14,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-10 03:01:14,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:01:14,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:14,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:14,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:14,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:14,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:14,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:14,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:14,386 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:14,386 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-10 03:01:14,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:14,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571816424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:14,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:14,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-10 03:01:14,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969604669] [2022-02-10 03:01:14,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:14,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:01:14,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:01:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:01:14,416 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) [2022-02-10 03:01:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:14,808 INFO L93 Difference]: Finished difference Result 108 states and 212 transitions. [2022-02-10 03:01:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:01:14,808 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 [2022-02-10 03:01:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:14,808 INFO L225 Difference]: With dead ends: 108 [2022-02-10 03:01:14,808 INFO L226 Difference]: Without dead ends: 106 [2022-02-10 03:01:14,809 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 [2022-02-10 03:01:14,809 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 [2022-02-10 03:01:14,809 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] [2022-02-10 03:01:14,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-10 03:01:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 62. [2022-02-10 03:01:14,810 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) [2022-02-10 03:01:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2022-02-10 03:01:14,811 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 13 [2022-02-10 03:01:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:14,811 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2022-02-10 03:01:14,811 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) [2022-02-10 03:01:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2022-02-10 03:01:14,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:14,811 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:14,811 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:14,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:15,024 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 [2022-02-10 03:01:15,025 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:15,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1114312241, now seen corresponding path program 29 times [2022-02-10 03:01:15,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:15,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744261717] [2022-02-10 03:01:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:15,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:15,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:15,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744261717] [2022-02-10 03:01:15,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744261717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:15,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068062483] [2022-02-10 03:01:15,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:01:15,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:15,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:15,083 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) [2022-02-10 03:01:15,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-10 03:01:15,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:01:15,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:15,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:15,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:15,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:15,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:15,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:15,169 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:01:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:15,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:15,293 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:15,294 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-10 03:01:15,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:15,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068062483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:15,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:15,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-10 03:01:15,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803966182] [2022-02-10 03:01:15,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:15,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:01:15,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:01:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:01:15,307 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) [2022-02-10 03:01:15,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:15,557 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2022-02-10 03:01:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:01:15,557 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 [2022-02-10 03:01:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:15,558 INFO L225 Difference]: With dead ends: 99 [2022-02-10 03:01:15,558 INFO L226 Difference]: Without dead ends: 99 [2022-02-10 03:01:15,558 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 [2022-02-10 03:01:15,558 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:01:15,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 68 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:01:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-10 03:01:15,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2022-02-10 03:01:15,560 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) [2022-02-10 03:01:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 140 transitions. [2022-02-10 03:01:15,560 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 140 transitions. Word has length 13 [2022-02-10 03:01:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:15,560 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 140 transitions. [2022-02-10 03:01:15,560 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) [2022-02-10 03:01:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 140 transitions. [2022-02-10 03:01:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:15,560 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:15,560 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:15,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-10 03:01:15,768 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 [2022-02-10 03:01:15,768 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:15,768 INFO L85 PathProgramCache]: Analyzing trace with hash 732792669, now seen corresponding path program 30 times [2022-02-10 03:01:15,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:15,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874093071] [2022-02-10 03:01:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:15,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:15,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:15,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874093071] [2022-02-10 03:01:15,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874093071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:15,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651419039] [2022-02-10 03:01:15,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:01:15,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:15,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:15,825 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) [2022-02-10 03:01:15,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-10 03:01:15,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-10 03:01:15,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:15,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:15,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:15,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:15,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:15,940 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 21 treesize of output 2 [2022-02-10 03:01:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:15,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:16,037 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:16,037 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 28 treesize of output 23 [2022-02-10 03:01:16,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:16,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651419039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:16,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:16,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:16,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034742136] [2022-02-10 03:01:16,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:16,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:16,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:16,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:16,048 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) [2022-02-10 03:01:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:16,169 INFO L93 Difference]: Finished difference Result 92 states and 195 transitions. [2022-02-10 03:01:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:01:16,170 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 [2022-02-10 03:01:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:16,171 INFO L225 Difference]: With dead ends: 92 [2022-02-10 03:01:16,171 INFO L226 Difference]: Without dead ends: 92 [2022-02-10 03:01:16,171 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 [2022-02-10 03:01:16,171 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 [2022-02-10 03:01:16,172 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] [2022-02-10 03:01:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-10 03:01:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2022-02-10 03:01:16,173 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) [2022-02-10 03:01:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 152 transitions. [2022-02-10 03:01:16,173 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 152 transitions. Word has length 13 [2022-02-10 03:01:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:16,173 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 152 transitions. [2022-02-10 03:01:16,173 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) [2022-02-10 03:01:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 152 transitions. [2022-02-10 03:01:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:16,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:16,174 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:16,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:16,374 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 [2022-02-10 03:01:16,374 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:16,375 INFO L85 PathProgramCache]: Analyzing trace with hash -186908039, now seen corresponding path program 31 times [2022-02-10 03:01:16,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:16,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232400840] [2022-02-10 03:01:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:16,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:16,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:16,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232400840] [2022-02-10 03:01:16,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232400840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:16,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556079258] [2022-02-10 03:01:16,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:01:16,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:16,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:16,444 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) [2022-02-10 03:01:16,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-10 03:01:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:16,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:16,608 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:01:16,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:16,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:16,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:16,715 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:16,716 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 42 treesize of output 33 [2022-02-10 03:01:16,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:16,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556079258] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:16,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:16,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:16,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766180421] [2022-02-10 03:01:16,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:16,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:16,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:16,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:16,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:16,733 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) [2022-02-10 03:01:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:16,888 INFO L93 Difference]: Finished difference Result 80 states and 173 transitions. [2022-02-10 03:01:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:01:16,888 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 [2022-02-10 03:01:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:16,889 INFO L225 Difference]: With dead ends: 80 [2022-02-10 03:01:16,889 INFO L226 Difference]: Without dead ends: 78 [2022-02-10 03:01:16,889 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 [2022-02-10 03:01:16,889 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 [2022-02-10 03:01:16,889 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] [2022-02-10 03:01:16,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-10 03:01:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2022-02-10 03:01:16,891 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) [2022-02-10 03:01:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 153 transitions. [2022-02-10 03:01:16,891 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 153 transitions. Word has length 13 [2022-02-10 03:01:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:16,891 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 153 transitions. [2022-02-10 03:01:16,891 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) [2022-02-10 03:01:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 153 transitions. [2022-02-10 03:01:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:16,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:16,892 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:16,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:17,103 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 [2022-02-10 03:01:17,103 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash 740523067, now seen corresponding path program 32 times [2022-02-10 03:01:17,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:17,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871236254] [2022-02-10 03:01:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:17,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:17,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:17,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871236254] [2022-02-10 03:01:17,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871236254] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:17,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224166683] [2022-02-10 03:01:17,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:01:17,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:17,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:17,156 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) [2022-02-10 03:01:17,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-10 03:01:17,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:17,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:17,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:17,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:17,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:17,249 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:01:17,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:17,252 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 35 treesize of output 27 [2022-02-10 03:01:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:17,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:17,365 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:17,365 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:01:17,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:17,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224166683] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:17,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:17,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:17,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162975096] [2022-02-10 03:01:17,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:17,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:17,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:17,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:17,377 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) [2022-02-10 03:01:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:17,571 INFO L93 Difference]: Finished difference Result 106 states and 208 transitions. [2022-02-10 03:01:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:17,571 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 [2022-02-10 03:01:17,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:17,572 INFO L225 Difference]: With dead ends: 106 [2022-02-10 03:01:17,572 INFO L226 Difference]: Without dead ends: 106 [2022-02-10 03:01:17,572 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 [2022-02-10 03:01:17,572 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 [2022-02-10 03:01:17,572 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] [2022-02-10 03:01:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-10 03:01:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 63. [2022-02-10 03:01:17,574 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) [2022-02-10 03:01:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 147 transitions. [2022-02-10 03:01:17,574 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 147 transitions. Word has length 13 [2022-02-10 03:01:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:17,574 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 147 transitions. [2022-02-10 03:01:17,574 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) [2022-02-10 03:01:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 147 transitions. [2022-02-10 03:01:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:17,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:17,574 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:17,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:17,791 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 [2022-02-10 03:01:17,792 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1542139295, now seen corresponding path program 33 times [2022-02-10 03:01:17,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:17,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956645053] [2022-02-10 03:01:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:17,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:17,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:17,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956645053] [2022-02-10 03:01:17,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956645053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:17,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300375881] [2022-02-10 03:01:17,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:01:17,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:17,854 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) [2022-02-10 03:01:17,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:01:17,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:17,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-10 03:01:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:17,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:17,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:17,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:17,929 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 35 treesize of output 27 [2022-02-10 03:01:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:17,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:18,049 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:18,049 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 42 treesize of output 33 [2022-02-10 03:01:18,051 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 21 treesize of output 13 [2022-02-10 03:01:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:18,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300375881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:18,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:18,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:18,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504412015] [2022-02-10 03:01:18,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:18,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:18,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:18,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:18,071 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) [2022-02-10 03:01:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:18,240 INFO L93 Difference]: Finished difference Result 86 states and 178 transitions. [2022-02-10 03:01:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:01:18,240 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 [2022-02-10 03:01:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:18,241 INFO L225 Difference]: With dead ends: 86 [2022-02-10 03:01:18,241 INFO L226 Difference]: Without dead ends: 84 [2022-02-10 03:01:18,241 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 [2022-02-10 03:01:18,241 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 [2022-02-10 03:01:18,241 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] [2022-02-10 03:01:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-10 03:01:18,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2022-02-10 03:01:18,243 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) [2022-02-10 03:01:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 153 transitions. [2022-02-10 03:01:18,243 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 153 transitions. Word has length 13 [2022-02-10 03:01:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:18,243 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 153 transitions. [2022-02-10 03:01:18,243 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) [2022-02-10 03:01:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 153 transitions. [2022-02-10 03:01:18,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:18,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:18,243 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:18,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:18,463 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 [2022-02-10 03:01:18,463 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1034484295, now seen corresponding path program 34 times [2022-02-10 03:01:18,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:18,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970199568] [2022-02-10 03:01:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:18,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:18,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:18,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970199568] [2022-02-10 03:01:18,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970199568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:18,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080792423] [2022-02-10 03:01:18,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:01:18,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:18,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:18,518 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) [2022-02-10 03:01:18,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-10 03:01:18,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:01:18,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:18,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:18,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:18,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:18,593 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 43 treesize of output 35 [2022-02-10 03:01:18,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:18,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:18,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:18,706 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:18,706 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:01:18,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:18,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080792423] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:18,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:18,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:18,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634877869] [2022-02-10 03:01:18,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:18,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:18,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:18,723 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) [2022-02-10 03:01:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:18,860 INFO L93 Difference]: Finished difference Result 79 states and 172 transitions. [2022-02-10 03:01:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:01:18,860 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 [2022-02-10 03:01:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:18,860 INFO L225 Difference]: With dead ends: 79 [2022-02-10 03:01:18,860 INFO L226 Difference]: Without dead ends: 79 [2022-02-10 03:01:18,861 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 [2022-02-10 03:01:18,861 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-10 03:01:18,861 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] [2022-02-10 03:01:18,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-10 03:01:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2022-02-10 03:01:18,862 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) [2022-02-10 03:01:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 145 transitions. [2022-02-10 03:01:18,862 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 145 transitions. Word has length 13 [2022-02-10 03:01:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:18,862 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 145 transitions. [2022-02-10 03:01:18,863 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) [2022-02-10 03:01:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 145 transitions. [2022-02-10 03:01:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:18,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:18,863 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:18,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:19,079 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 [2022-02-10 03:01:19,079 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash -748881929, now seen corresponding path program 35 times [2022-02-10 03:01:19,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:19,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9078563] [2022-02-10 03:01:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:19,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:19,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:19,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9078563] [2022-02-10 03:01:19,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9078563] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:19,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039779329] [2022-02-10 03:01:19,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:01:19,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:19,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:19,136 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) [2022-02-10 03:01:19,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-10 03:01:19,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:01:19,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:19,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:19,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:19,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:19,209 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 43 treesize of output 35 [2022-02-10 03:01:19,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:19,211 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:01:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:19,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:19,322 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:19,322 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:01:19,324 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 21 treesize of output 13 [2022-02-10 03:01:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:19,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039779329] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:19,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:19,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:19,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321398335] [2022-02-10 03:01:19,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:19,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:19,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:19,339 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) [2022-02-10 03:01:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:19,488 INFO L93 Difference]: Finished difference Result 96 states and 188 transitions. [2022-02-10 03:01:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:01:19,488 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 [2022-02-10 03:01:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:19,489 INFO L225 Difference]: With dead ends: 96 [2022-02-10 03:01:19,489 INFO L226 Difference]: Without dead ends: 96 [2022-02-10 03:01:19,489 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 [2022-02-10 03:01:19,489 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 [2022-02-10 03:01:19,489 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] [2022-02-10 03:01:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-10 03:01:19,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2022-02-10 03:01:19,491 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) [2022-02-10 03:01:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 145 transitions. [2022-02-10 03:01:19,492 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 145 transitions. Word has length 13 [2022-02-10 03:01:19,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:19,492 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 145 transitions. [2022-02-10 03:01:19,492 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) [2022-02-10 03:01:19,492 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 145 transitions. [2022-02-10 03:01:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:19,492 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:19,492 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:19,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:19,708 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 [2022-02-10 03:01:19,709 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:19,709 INFO L85 PathProgramCache]: Analyzing trace with hash 52734299, now seen corresponding path program 36 times [2022-02-10 03:01:19,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:19,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281973044] [2022-02-10 03:01:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:19,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:19,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:19,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281973044] [2022-02-10 03:01:19,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281973044] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:19,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141993474] [2022-02-10 03:01:19,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:01:19,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:19,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:19,768 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) [2022-02-10 03:01:19,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-10 03:01:19,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:01:19,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:19,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:19,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:19,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:19,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:19,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:19,848 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 [2022-02-10 03:01:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:19,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:19,990 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:19,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:19,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:19,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141993474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:19,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:19,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:19,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241019478] [2022-02-10 03:01:19,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:19,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:19,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:20,000 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) [2022-02-10 03:01:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:20,242 INFO L93 Difference]: Finished difference Result 95 states and 183 transitions. [2022-02-10 03:01:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:01:20,243 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 [2022-02-10 03:01:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:20,243 INFO L225 Difference]: With dead ends: 95 [2022-02-10 03:01:20,243 INFO L226 Difference]: Without dead ends: 91 [2022-02-10 03:01:20,243 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 [2022-02-10 03:01:20,244 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 [2022-02-10 03:01:20,244 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] [2022-02-10 03:01:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-10 03:01:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2022-02-10 03:01:20,245 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) [2022-02-10 03:01:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 152 transitions. [2022-02-10 03:01:20,245 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 152 transitions. Word has length 13 [2022-02-10 03:01:20,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:20,245 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 152 transitions. [2022-02-10 03:01:20,245 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) [2022-02-10 03:01:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 152 transitions. [2022-02-10 03:01:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:20,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:20,246 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:20,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:20,455 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 [2022-02-10 03:01:20,455 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:20,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1771078005, now seen corresponding path program 37 times [2022-02-10 03:01:20,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:20,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102888471] [2022-02-10 03:01:20,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:20,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:20,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:20,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102888471] [2022-02-10 03:01:20,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102888471] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:20,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108985821] [2022-02-10 03:01:20,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:01:20,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:20,508 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) [2022-02-10 03:01:20,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-10 03:01:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:20,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:20,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:20,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:20,585 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 43 treesize of output 35 [2022-02-10 03:01:20,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:20,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:20,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:20,699 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:20,699 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:01:20,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:20,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108985821] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:20,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:20,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:20,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423746698] [2022-02-10 03:01:20,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:20,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:20,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:20,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:20,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:20,709 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) [2022-02-10 03:01:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:20,835 INFO L93 Difference]: Finished difference Result 81 states and 168 transitions. [2022-02-10 03:01:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:20,835 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 [2022-02-10 03:01:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:20,836 INFO L225 Difference]: With dead ends: 81 [2022-02-10 03:01:20,836 INFO L226 Difference]: Without dead ends: 81 [2022-02-10 03:01:20,836 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 [2022-02-10 03:01:20,836 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 [2022-02-10 03:01:20,836 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] [2022-02-10 03:01:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-10 03:01:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2022-02-10 03:01:20,838 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) [2022-02-10 03:01:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 138 transitions. [2022-02-10 03:01:20,838 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 138 transitions. Word has length 13 [2022-02-10 03:01:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:20,838 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 138 transitions. [2022-02-10 03:01:20,838 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) [2022-02-10 03:01:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 138 transitions. [2022-02-10 03:01:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 03:01:20,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:20,838 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:20,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:21,051 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 [2022-02-10 03:01:21,052 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:21,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 60464697, now seen corresponding path program 38 times [2022-02-10 03:01:21,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:21,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648867733] [2022-02-10 03:01:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:21,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:21,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:21,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648867733] [2022-02-10 03:01:21,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648867733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:21,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926911598] [2022-02-10 03:01:21,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:01:21,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:21,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:21,116 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) [2022-02-10 03:01:21,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-10 03:01:21,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:21,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-10 03:01:21,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:21,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:21,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:21,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:21,221 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 7 treesize of output 1 [2022-02-10 03:01:21,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:21,226 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 8 treesize of output 1 [2022-02-10 03:01:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:21,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:21,336 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:01:21,337 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:01:21,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:21,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926911598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:21,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:21,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 03:01:21,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174708821] [2022-02-10 03:01:21,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:21,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:01:21,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:01:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:01:21,351 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) [2022-02-10 03:01:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:21,466 INFO L93 Difference]: Finished difference Result 78 states and 168 transitions. [2022-02-10 03:01:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:21,466 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 [2022-02-10 03:01:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:21,467 INFO L225 Difference]: With dead ends: 78 [2022-02-10 03:01:21,467 INFO L226 Difference]: Without dead ends: 78 [2022-02-10 03:01:21,467 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 [2022-02-10 03:01:21,476 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 [2022-02-10 03:01:21,476 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] [2022-02-10 03:01:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-10 03:01:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2022-02-10 03:01:21,486 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) [2022-02-10 03:01:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 138 transitions. [2022-02-10 03:01:21,486 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 138 transitions. Word has length 13 [2022-02-10 03:01:21,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:21,486 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 138 transitions. [2022-02-10 03:01:21,486 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) [2022-02-10 03:01:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 138 transitions. [2022-02-10 03:01:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:21,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:21,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:21,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:21,687 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 [2022-02-10 03:01:21,687 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1446621923, now seen corresponding path program 39 times [2022-02-10 03:01:21,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:21,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506026723] [2022-02-10 03:01:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:21,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:21,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:21,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506026723] [2022-02-10 03:01:21,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506026723] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:21,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125401862] [2022-02-10 03:01:21,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:01:21,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:21,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:21,965 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) [2022-02-10 03:01:21,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-10 03:01:21,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:01:21,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:22,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:22,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:22,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:22,327 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 [2022-02-10 03:01:22,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:22,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:22,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:22,876 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:22,876 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 [2022-02-10 03:01:22,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:22,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:22,892 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 [2022-02-10 03:01:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:23,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125401862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:23,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:23,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:01:23,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89264383] [2022-02-10 03:01:23,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:23,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:01:23,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:23,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:01:23,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:01:23,207 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) [2022-02-10 03:01:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:23,502 INFO L93 Difference]: Finished difference Result 95 states and 198 transitions. [2022-02-10 03:01:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:01:23,502 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 [2022-02-10 03:01:23,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:23,502 INFO L225 Difference]: With dead ends: 95 [2022-02-10 03:01:23,502 INFO L226 Difference]: Without dead ends: 92 [2022-02-10 03:01:23,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:01:23,503 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 [2022-02-10 03:01:23,503 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] [2022-02-10 03:01:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-10 03:01:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2022-02-10 03:01:23,504 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) [2022-02-10 03:01:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 143 transitions. [2022-02-10 03:01:23,504 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 143 transitions. Word has length 14 [2022-02-10 03:01:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:23,504 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 143 transitions. [2022-02-10 03:01:23,504 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) [2022-02-10 03:01:23,505 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 143 transitions. [2022-02-10 03:01:23,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:23,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:23,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:23,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-10 03:01:23,719 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 [2022-02-10 03:01:23,719 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:23,719 INFO L85 PathProgramCache]: Analyzing trace with hash -400541601, now seen corresponding path program 40 times [2022-02-10 03:01:23,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:23,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813194941] [2022-02-10 03:01:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:23,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:24,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:24,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813194941] [2022-02-10 03:01:24,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813194941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:24,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873094662] [2022-02-10 03:01:24,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:01:24,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:24,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:24,015 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) [2022-02-10 03:01:24,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-10 03:01:24,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:01:24,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:24,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:24,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:24,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:24,343 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:01:24,343 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 [2022-02-10 03:01:24,348 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:01:24,349 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 62 treesize of output 53 [2022-02-10 03:01:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:24,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:24,900 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:24,900 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 [2022-02-10 03:01:24,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:24,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:24,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-10 03:01:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:25,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873094662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:25,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:25,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-10 03:01:25,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425479264] [2022-02-10 03:01:25,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:25,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:01:25,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:01:25,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:01:25,192 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) [2022-02-10 03:01:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:25,636 INFO L93 Difference]: Finished difference Result 86 states and 189 transitions. [2022-02-10 03:01:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:01:25,636 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 [2022-02-10 03:01:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:25,637 INFO L225 Difference]: With dead ends: 86 [2022-02-10 03:01:25,637 INFO L226 Difference]: Without dead ends: 83 [2022-02-10 03:01:25,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:01:25,637 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 [2022-02-10 03:01:25,637 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] [2022-02-10 03:01:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-10 03:01:25,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2022-02-10 03:01:25,639 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) [2022-02-10 03:01:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 153 transitions. [2022-02-10 03:01:25,639 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 153 transitions. Word has length 14 [2022-02-10 03:01:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:25,639 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 153 transitions. [2022-02-10 03:01:25,639 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) [2022-02-10 03:01:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 153 transitions. [2022-02-10 03:01:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:25,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:25,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:25,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-10 03:01:25,847 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 [2022-02-10 03:01:25,847 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:25,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:25,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1206979585, now seen corresponding path program 41 times [2022-02-10 03:01:25,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:25,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872937059] [2022-02-10 03:01:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:25,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:26,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:26,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872937059] [2022-02-10 03:01:26,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872937059] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:26,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355334110] [2022-02-10 03:01:26,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:01:26,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:26,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:26,059 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) [2022-02-10 03:01:26,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-10 03:01:26,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:26,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:26,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:26,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:26,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:26,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:26,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:26,406 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 [2022-02-10 03:01:26,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:26,408 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 58 treesize of output 46 [2022-02-10 03:01:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:26,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:26,956 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:26,956 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 [2022-02-10 03:01:26,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:26,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:26,972 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 [2022-02-10 03:01:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:27,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355334110] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:27,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:27,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:01:27,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107168405] [2022-02-10 03:01:27,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:27,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:01:27,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:27,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:01:27,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:01:27,196 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) [2022-02-10 03:01:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:27,478 INFO L93 Difference]: Finished difference Result 87 states and 189 transitions. [2022-02-10 03:01:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:01:27,478 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 [2022-02-10 03:01:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:27,480 INFO L225 Difference]: With dead ends: 87 [2022-02-10 03:01:27,480 INFO L226 Difference]: Without dead ends: 84 [2022-02-10 03:01:27,481 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 [2022-02-10 03:01:27,481 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 [2022-02-10 03:01:27,481 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] [2022-02-10 03:01:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-10 03:01:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2022-02-10 03:01:27,482 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) [2022-02-10 03:01:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 153 transitions. [2022-02-10 03:01:27,483 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 153 transitions. Word has length 14 [2022-02-10 03:01:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:27,483 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 153 transitions. [2022-02-10 03:01:27,483 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) [2022-02-10 03:01:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 153 transitions. [2022-02-10 03:01:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:27,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:27,483 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:27,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-10 03:01:27,687 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 [2022-02-10 03:01:27,687 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:27,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1358940377, now seen corresponding path program 42 times [2022-02-10 03:01:27,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:27,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278907695] [2022-02-10 03:01:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:27,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:27,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:27,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278907695] [2022-02-10 03:01:27,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278907695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:27,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805694035] [2022-02-10 03:01:27,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:01:27,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:27,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:27,954 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) [2022-02-10 03:01:27,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-10 03:01:27,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-10 03:01:27,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:27,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:27,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:28,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:28,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:28,295 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 [2022-02-10 03:01:28,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:28,297 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 58 treesize of output 46 [2022-02-10 03:01:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:28,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:28,864 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:28,864 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 [2022-02-10 03:01:28,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:28,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:28,880 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 [2022-02-10 03:01:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:29,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805694035] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:29,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:29,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:01:29,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398524432] [2022-02-10 03:01:29,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:29,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:01:29,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:01:29,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:01:29,090 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) [2022-02-10 03:01:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:29,511 INFO L93 Difference]: Finished difference Result 88 states and 190 transitions. [2022-02-10 03:01:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:01:29,512 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 [2022-02-10 03:01:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:29,512 INFO L225 Difference]: With dead ends: 88 [2022-02-10 03:01:29,512 INFO L226 Difference]: Without dead ends: 85 [2022-02-10 03:01:29,512 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 [2022-02-10 03:01:29,513 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 [2022-02-10 03:01:29,513 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] [2022-02-10 03:01:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-10 03:01:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2022-02-10 03:01:29,514 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) [2022-02-10 03:01:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 153 transitions. [2022-02-10 03:01:29,515 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 153 transitions. Word has length 14 [2022-02-10 03:01:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:29,515 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 153 transitions. [2022-02-10 03:01:29,515 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) [2022-02-10 03:01:29,515 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 153 transitions. [2022-02-10 03:01:29,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:29,515 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:29,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:29,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:29,727 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 [2022-02-10 03:01:29,727 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:29,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1602893341, now seen corresponding path program 43 times [2022-02-10 03:01:29,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:29,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380856794] [2022-02-10 03:01:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:29,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:29,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:29,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380856794] [2022-02-10 03:01:29,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380856794] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:29,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940595416] [2022-02-10 03:01:29,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:01:29,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:29,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:29,882 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) [2022-02-10 03:01:29,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-10 03:01:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:29,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:29,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:30,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:30,219 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 [2022-02-10 03:01:30,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:30,221 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 60 treesize of output 48 [2022-02-10 03:01:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:30,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:30,881 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:30,881 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 [2022-02-10 03:01:30,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:30,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:30,897 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 [2022-02-10 03:01:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:31,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940595416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:31,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:31,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:01:31,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877189003] [2022-02-10 03:01:31,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:31,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:01:31,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:31,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:01:31,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:01:31,162 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) [2022-02-10 03:01:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:31,683 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2022-02-10 03:01:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:01:31,684 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 [2022-02-10 03:01:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:31,684 INFO L225 Difference]: With dead ends: 102 [2022-02-10 03:01:31,684 INFO L226 Difference]: Without dead ends: 99 [2022-02-10 03:01:31,684 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 [2022-02-10 03:01:31,685 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 [2022-02-10 03:01:31,685 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] [2022-02-10 03:01:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-10 03:01:31,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2022-02-10 03:01:31,690 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) [2022-02-10 03:01:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 157 transitions. [2022-02-10 03:01:31,690 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 157 transitions. Word has length 14 [2022-02-10 03:01:31,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:31,691 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 157 transitions. [2022-02-10 03:01:31,691 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) [2022-02-10 03:01:31,691 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 157 transitions. [2022-02-10 03:01:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:31,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:31,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:31,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-10 03:01:31,895 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 [2022-02-10 03:01:31,895 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1595162943, now seen corresponding path program 44 times [2022-02-10 03:01:31,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:31,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076826950] [2022-02-10 03:01:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:31,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:32,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:32,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076826950] [2022-02-10 03:01:32,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076826950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:32,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728890001] [2022-02-10 03:01:32,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:01:32,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:32,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:32,175 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) [2022-02-10 03:01:32,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-10 03:01:32,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:32,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:32,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:32,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:32,532 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:01:32,532 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 [2022-02-10 03:01:32,537 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:01:32,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:32,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:33,220 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:33,220 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 [2022-02-10 03:01:33,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:33,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:33,237 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 [2022-02-10 03:01:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:33,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728890001] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:33,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:33,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-10 03:01:33,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016652181] [2022-02-10 03:01:33,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:33,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:01:33,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:33,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:01:33,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:01:33,508 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) [2022-02-10 03:01:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:34,432 INFO L93 Difference]: Finished difference Result 98 states and 209 transitions. [2022-02-10 03:01:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:01:34,433 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 [2022-02-10 03:01:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:34,433 INFO L225 Difference]: With dead ends: 98 [2022-02-10 03:01:34,433 INFO L226 Difference]: Without dead ends: 88 [2022-02-10 03:01:34,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:01:34,434 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 [2022-02-10 03:01:34,434 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] [2022-02-10 03:01:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-10 03:01:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2022-02-10 03:01:34,435 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) [2022-02-10 03:01:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 170 transitions. [2022-02-10 03:01:34,435 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 170 transitions. Word has length 14 [2022-02-10 03:01:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:34,435 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 170 transitions. [2022-02-10 03:01:34,435 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) [2022-02-10 03:01:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 170 transitions. [2022-02-10 03:01:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:34,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:34,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:34,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:34,651 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 [2022-02-10 03:01:34,651 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1210399357, now seen corresponding path program 45 times [2022-02-10 03:01:34,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:34,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019893807] [2022-02-10 03:01:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:34,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:35,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:35,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019893807] [2022-02-10 03:01:35,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019893807] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:35,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263239359] [2022-02-10 03:01:35,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:01:35,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:35,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:35,005 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) [2022-02-10 03:01:35,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-10 03:01:35,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:01:35,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:35,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-10 03:01:35,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:35,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:35,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:35,362 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:01:35,362 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 [2022-02-10 03:01:35,368 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:01:35,368 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 85 treesize of output 72 [2022-02-10 03:01:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:35,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:36,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:36,234 INFO L353 Elim1Store]: treesize reduction 19, result has 53.7 percent of original size [2022-02-10 03:01:36,234 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 [2022-02-10 03:01:36,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:36,247 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 [2022-02-10 03:01:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:36,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263239359] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:36,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:36,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-02-10 03:01:36,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263069382] [2022-02-10 03:01:36,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:36,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:01:36,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:01:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:01:36,601 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) [2022-02-10 03:01:38,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:38,799 INFO L93 Difference]: Finished difference Result 142 states and 285 transitions. [2022-02-10 03:01:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:01:38,799 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 [2022-02-10 03:01:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:38,800 INFO L225 Difference]: With dead ends: 142 [2022-02-10 03:01:38,800 INFO L226 Difference]: Without dead ends: 130 [2022-02-10 03:01:38,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:01:38,800 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:01:38,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 28 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 449 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-02-10 03:01:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-10 03:01:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 80. [2022-02-10 03:01:38,802 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) [2022-02-10 03:01:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 189 transitions. [2022-02-10 03:01:38,802 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 189 transitions. Word has length 14 [2022-02-10 03:01:38,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:38,802 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 189 transitions. [2022-02-10 03:01:38,802 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) [2022-02-10 03:01:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 189 transitions. [2022-02-10 03:01:38,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:38,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:38,802 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:38,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:39,015 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 [2022-02-10 03:01:39,016 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:39,016 INFO L85 PathProgramCache]: Analyzing trace with hash -667700127, now seen corresponding path program 46 times [2022-02-10 03:01:39,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:39,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876228404] [2022-02-10 03:01:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:39,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:39,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:39,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876228404] [2022-02-10 03:01:39,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876228404] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:39,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492137282] [2022-02-10 03:01:39,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:01:39,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:39,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:39,081 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) [2022-02-10 03:01:39,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-10 03:01:39,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:01:39,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:39,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-10 03:01:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:39,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:39,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:39,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:39,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:39,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:39,363 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:01:39,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:39,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:01:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:39,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492137282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:39,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:39,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-10 03:01:39,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910727033] [2022-02-10 03:01:39,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:39,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:01:39,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:39,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:01:39,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:01:39,374 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) [2022-02-10 03:01:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:39,602 INFO L93 Difference]: Finished difference Result 112 states and 245 transitions. [2022-02-10 03:01:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:01:39,603 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 [2022-02-10 03:01:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:39,603 INFO L225 Difference]: With dead ends: 112 [2022-02-10 03:01:39,603 INFO L226 Difference]: Without dead ends: 112 [2022-02-10 03:01:39,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:01:39,603 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 [2022-02-10 03:01:39,603 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] [2022-02-10 03:01:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-10 03:01:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2022-02-10 03:01:39,607 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) [2022-02-10 03:01:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 183 transitions. [2022-02-10 03:01:39,607 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 183 transitions. Word has length 14 [2022-02-10 03:01:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:39,607 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 183 transitions. [2022-02-10 03:01:39,608 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) [2022-02-10 03:01:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 183 transitions. [2022-02-10 03:01:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:39,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:39,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:39,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-10 03:01:39,813 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 [2022-02-10 03:01:39,813 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:39,813 INFO L85 PathProgramCache]: Analyzing trace with hash -221091617, now seen corresponding path program 47 times [2022-02-10 03:01:39,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:39,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98190211] [2022-02-10 03:01:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:39,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:39,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:39,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98190211] [2022-02-10 03:01:39,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98190211] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:39,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347694099] [2022-02-10 03:01:39,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:01:39,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:39,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:39,990 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) [2022-02-10 03:01:39,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-10 03:01:40,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:40,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:40,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:40,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:40,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:40,228 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 [2022-02-10 03:01:40,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:40,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:40,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:40,692 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-10 03:01:40,692 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 [2022-02-10 03:01:40,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:40,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:40,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:40,713 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 [2022-02-10 03:01:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:41,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347694099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:41,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:41,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:01:41,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939426338] [2022-02-10 03:01:41,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:41,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:01:41,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:01:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:01:41,011 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) [2022-02-10 03:01:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:41,532 INFO L93 Difference]: Finished difference Result 134 states and 272 transitions. [2022-02-10 03:01:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:01:41,532 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 [2022-02-10 03:01:41,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:41,533 INFO L225 Difference]: With dead ends: 134 [2022-02-10 03:01:41,533 INFO L226 Difference]: Without dead ends: 125 [2022-02-10 03:01:41,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:01:41,533 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 [2022-02-10 03:01:41,533 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] [2022-02-10 03:01:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-10 03:01:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 87. [2022-02-10 03:01:41,535 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) [2022-02-10 03:01:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 207 transitions. [2022-02-10 03:01:41,535 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 207 transitions. Word has length 14 [2022-02-10 03:01:41,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:41,535 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 207 transitions. [2022-02-10 03:01:41,535 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) [2022-02-10 03:01:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 207 transitions. [2022-02-10 03:01:41,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:41,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:41,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:41,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:41,755 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 [2022-02-10 03:01:41,756 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:41,756 INFO L85 PathProgramCache]: Analyzing trace with hash 26281119, now seen corresponding path program 48 times [2022-02-10 03:01:41,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:41,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519024232] [2022-02-10 03:01:41,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:41,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:41,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:41,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519024232] [2022-02-10 03:01:41,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519024232] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:41,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626306159] [2022-02-10 03:01:41,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:01:41,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:41,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:41,962 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) [2022-02-10 03:01:41,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-10 03:01:41,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:01:41,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:41,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:41,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:42,328 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:01:42,328 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 [2022-02-10 03:01:42,335 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:01:42,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:42,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:42,871 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-10 03:01:42,871 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 [2022-02-10 03:01:42,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:42,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:42,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:42,889 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 [2022-02-10 03:01:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:43,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626306159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:43,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:43,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:01:43,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580966456] [2022-02-10 03:01:43,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:43,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:01:43,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:01:43,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:01:43,235 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) [2022-02-10 03:01:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:43,698 INFO L93 Difference]: Finished difference Result 126 states and 274 transitions. [2022-02-10 03:01:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:01:43,699 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 [2022-02-10 03:01:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:43,699 INFO L225 Difference]: With dead ends: 126 [2022-02-10 03:01:43,699 INFO L226 Difference]: Without dead ends: 120 [2022-02-10 03:01:43,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:01:43,699 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 [2022-02-10 03:01:43,700 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] [2022-02-10 03:01:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-10 03:01:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2022-02-10 03:01:43,703 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) [2022-02-10 03:01:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 225 transitions. [2022-02-10 03:01:43,703 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 225 transitions. Word has length 14 [2022-02-10 03:01:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:43,703 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 225 transitions. [2022-02-10 03:01:43,703 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) [2022-02-10 03:01:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 225 transitions. [2022-02-10 03:01:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:43,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:43,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:43,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:43,919 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 [2022-02-10 03:01:43,919 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:43,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1633802305, now seen corresponding path program 49 times [2022-02-10 03:01:43,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:43,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760674675] [2022-02-10 03:01:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:43,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:44,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:44,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760674675] [2022-02-10 03:01:44,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760674675] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:44,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849778078] [2022-02-10 03:01:44,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:01:44,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:44,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:44,077 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) [2022-02-10 03:01:44,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-10 03:01:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:44,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:44,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:44,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:44,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:44,416 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 [2022-02-10 03:01:44,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:44,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:44,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:44,947 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-10 03:01:44,947 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 [2022-02-10 03:01:44,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:44,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:44,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:44,965 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 [2022-02-10 03:01:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:45,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849778078] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:45,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:45,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:01:45,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063689832] [2022-02-10 03:01:45,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:45,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:01:45,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:01:45,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:01:45,381 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) [2022-02-10 03:01:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:45,664 INFO L93 Difference]: Finished difference Result 139 states and 306 transitions. [2022-02-10 03:01:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:01:45,664 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 [2022-02-10 03:01:45,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:45,664 INFO L225 Difference]: With dead ends: 139 [2022-02-10 03:01:45,664 INFO L226 Difference]: Without dead ends: 133 [2022-02-10 03:01:45,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:01:45,666 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 [2022-02-10 03:01:45,666 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] [2022-02-10 03:01:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-10 03:01:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 93. [2022-02-10 03:01:45,667 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) [2022-02-10 03:01:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 229 transitions. [2022-02-10 03:01:45,668 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 229 transitions. Word has length 14 [2022-02-10 03:01:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:45,668 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 229 transitions. [2022-02-10 03:01:45,668 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) [2022-02-10 03:01:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 229 transitions. [2022-02-10 03:01:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:45,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:45,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:45,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-02-10 03:01:45,868 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 [2022-02-10 03:01:45,869 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:45,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1091636101, now seen corresponding path program 50 times [2022-02-10 03:01:45,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:45,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225321710] [2022-02-10 03:01:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:45,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:46,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:46,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225321710] [2022-02-10 03:01:46,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225321710] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:46,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590080867] [2022-02-10 03:01:46,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:01:46,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:46,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:46,084 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) [2022-02-10 03:01:46,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-10 03:01:46,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:46,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:46,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:46,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:46,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:46,387 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 [2022-02-10 03:01:46,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:46,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:46,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:46,926 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-10 03:01:46,927 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 [2022-02-10 03:01:46,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:46,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:46,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:46,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-10 03:01:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:47,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590080867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:47,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:47,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:01:47,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36606920] [2022-02-10 03:01:47,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:47,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:01:47,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:47,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:01:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:01:47,229 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) [2022-02-10 03:01:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:47,901 INFO L93 Difference]: Finished difference Result 161 states and 334 transitions. [2022-02-10 03:01:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:01:47,901 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 [2022-02-10 03:01:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:47,902 INFO L225 Difference]: With dead ends: 161 [2022-02-10 03:01:47,902 INFO L226 Difference]: Without dead ends: 149 [2022-02-10 03:01:47,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:01:47,902 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:01:47,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:01:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-10 03:01:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2022-02-10 03:01:47,904 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) [2022-02-10 03:01:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 252 transitions. [2022-02-10 03:01:47,904 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 252 transitions. Word has length 14 [2022-02-10 03:01:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:47,904 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 252 transitions. [2022-02-10 03:01:47,904 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) [2022-02-10 03:01:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 252 transitions. [2022-02-10 03:01:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:47,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:47,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:47,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-10 03:01:48,105 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 [2022-02-10 03:01:48,105 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:48,106 INFO L85 PathProgramCache]: Analyzing trace with hash -390038497, now seen corresponding path program 51 times [2022-02-10 03:01:48,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:48,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454184687] [2022-02-10 03:01:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:48,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:48,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:48,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454184687] [2022-02-10 03:01:48,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454184687] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:48,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301587675] [2022-02-10 03:01:48,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:01:48,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:48,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:48,263 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) [2022-02-10 03:01:48,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-10 03:01:48,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:01:48,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:48,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:48,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:48,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:48,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:48,550 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 [2022-02-10 03:01:48,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:48,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:48,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:49,005 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-10 03:01:49,006 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 [2022-02-10 03:01:49,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:49,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:49,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:49,024 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 [2022-02-10 03:01:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:49,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301587675] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:49,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:49,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-10 03:01:49,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485042249] [2022-02-10 03:01:49,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:49,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:01:49,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:01:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:01:49,321 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) [2022-02-10 03:01:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:49,615 INFO L93 Difference]: Finished difference Result 171 states and 375 transitions. [2022-02-10 03:01:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:01:49,615 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 [2022-02-10 03:01:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:49,616 INFO L225 Difference]: With dead ends: 171 [2022-02-10 03:01:49,616 INFO L226 Difference]: Without dead ends: 162 [2022-02-10 03:01:49,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:01:49,623 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 [2022-02-10 03:01:49,623 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] [2022-02-10 03:01:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-10 03:01:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2022-02-10 03:01:49,625 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) [2022-02-10 03:01:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 293 transitions. [2022-02-10 03:01:49,625 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 293 transitions. Word has length 14 [2022-02-10 03:01:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:49,625 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 293 transitions. [2022-02-10 03:01:49,625 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) [2022-02-10 03:01:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 293 transitions. [2022-02-10 03:01:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:49,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:49,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:49,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:49,832 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 [2022-02-10 03:01:49,832 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:49,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:49,833 INFO L85 PathProgramCache]: Analyzing trace with hash 732600931, now seen corresponding path program 52 times [2022-02-10 03:01:49,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:49,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252428736] [2022-02-10 03:01:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:49,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:50,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:50,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252428736] [2022-02-10 03:01:50,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252428736] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:50,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230414880] [2022-02-10 03:01:50,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:01:50,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:50,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:50,126 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) [2022-02-10 03:01:50,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-10 03:01:50,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:01:50,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:50,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:50,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:50,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:50,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:50,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:50,464 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 [2022-02-10 03:01:50,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:50,466 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 58 treesize of output 46 [2022-02-10 03:01:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:50,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:51,022 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:51,023 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 [2022-02-10 03:01:51,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:51,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:51,040 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 [2022-02-10 03:01:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:51,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230414880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:51,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:51,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:01:51,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140074425] [2022-02-10 03:01:51,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:51,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:01:51,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:51,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:01:51,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:01:51,280 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) [2022-02-10 03:01:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:51,779 INFO L93 Difference]: Finished difference Result 148 states and 366 transitions. [2022-02-10 03:01:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:01:51,780 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 [2022-02-10 03:01:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:51,780 INFO L225 Difference]: With dead ends: 148 [2022-02-10 03:01:51,780 INFO L226 Difference]: Without dead ends: 145 [2022-02-10 03:01:51,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:01:51,781 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 [2022-02-10 03:01:51,781 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] [2022-02-10 03:01:51,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-10 03:01:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2022-02-10 03:01:51,783 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) [2022-02-10 03:01:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 297 transitions. [2022-02-10 03:01:51,783 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 297 transitions. Word has length 14 [2022-02-10 03:01:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:51,783 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 297 transitions. [2022-02-10 03:01:51,783 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) [2022-02-10 03:01:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 297 transitions. [2022-02-10 03:01:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:51,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:51,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:51,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-10 03:01:51,998 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 [2022-02-10 03:01:51,999 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:51,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1304055737, now seen corresponding path program 53 times [2022-02-10 03:01:51,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:51,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330605907] [2022-02-10 03:01:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:51,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:52,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:52,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330605907] [2022-02-10 03:01:52,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330605907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:52,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487462261] [2022-02-10 03:01:52,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:01:52,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:52,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:52,244 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) [2022-02-10 03:01:52,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-10 03:01:52,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:52,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:52,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:52,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:52,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:52,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:52,575 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 [2022-02-10 03:01:52,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:52,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:52,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:53,105 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:53,105 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 [2022-02-10 03:01:53,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:53,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:53,121 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 [2022-02-10 03:01:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:53,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487462261] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:53,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:53,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-10 03:01:53,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700292653] [2022-02-10 03:01:53,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:53,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:01:53,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:53,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:01:53,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:01:53,405 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) [2022-02-10 03:01:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:53,699 INFO L93 Difference]: Finished difference Result 142 states and 359 transitions. [2022-02-10 03:01:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:01:53,699 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 [2022-02-10 03:01:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:53,700 INFO L225 Difference]: With dead ends: 142 [2022-02-10 03:01:53,700 INFO L226 Difference]: Without dead ends: 139 [2022-02-10 03:01:53,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:01:53,700 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 [2022-02-10 03:01:53,700 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] [2022-02-10 03:01:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-10 03:01:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 114. [2022-02-10 03:01:53,702 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) [2022-02-10 03:01:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 300 transitions. [2022-02-10 03:01:53,702 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 300 transitions. Word has length 14 [2022-02-10 03:01:53,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:53,703 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 300 transitions. [2022-02-10 03:01:53,703 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) [2022-02-10 03:01:53,703 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 300 transitions. [2022-02-10 03:01:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:53,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:53,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:53,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-10 03:01:53,903 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 [2022-02-10 03:01:53,904 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1261864225, now seen corresponding path program 54 times [2022-02-10 03:01:53,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:53,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928001069] [2022-02-10 03:01:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:53,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:54,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:54,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928001069] [2022-02-10 03:01:54,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928001069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:54,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636769344] [2022-02-10 03:01:54,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:01:54,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:54,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:54,158 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) [2022-02-10 03:01:54,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-10 03:01:54,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-10 03:01:54,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:54,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:54,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:54,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:54,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:54,504 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 [2022-02-10 03:01:54,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:54,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:54,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:55,057 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:55,057 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 [2022-02-10 03:01:55,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:55,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:55,073 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 [2022-02-10 03:01:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:55,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636769344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:55,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:55,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:01:55,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474242367] [2022-02-10 03:01:55,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:55,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:01:55,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:55,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:01:55,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:01:55,310 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) [2022-02-10 03:01:55,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:55,530 INFO L93 Difference]: Finished difference Result 141 states and 358 transitions. [2022-02-10 03:01:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:01:55,531 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 [2022-02-10 03:01:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:55,531 INFO L225 Difference]: With dead ends: 141 [2022-02-10 03:01:55,531 INFO L226 Difference]: Without dead ends: 138 [2022-02-10 03:01:55,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:01:55,532 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 [2022-02-10 03:01:55,532 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] [2022-02-10 03:01:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-10 03:01:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2022-02-10 03:01:55,533 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) [2022-02-10 03:01:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 303 transitions. [2022-02-10 03:01:55,534 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 303 transitions. Word has length 14 [2022-02-10 03:01:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:55,534 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 303 transitions. [2022-02-10 03:01:55,534 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) [2022-02-10 03:01:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 303 transitions. [2022-02-10 03:01:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:55,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:55,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:55,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-10 03:01:55,743 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 [2022-02-10 03:01:55,743 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:55,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash 456479481, now seen corresponding path program 55 times [2022-02-10 03:01:55,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:55,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071168013] [2022-02-10 03:01:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:55,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:55,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:55,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071168013] [2022-02-10 03:01:55,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071168013] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:55,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748046200] [2022-02-10 03:01:55,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:01:55,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:55,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:55,898 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) [2022-02-10 03:01:55,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-10 03:01:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:55,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:55,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:56,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:56,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:56,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:56,221 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 [2022-02-10 03:01:56,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:56,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:01:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:56,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:56,744 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:56,744 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 [2022-02-10 03:01:56,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:56,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:56,761 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 [2022-02-10 03:01:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:56,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748046200] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:56,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:56,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-10 03:01:56,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459047077] [2022-02-10 03:01:56,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:56,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:01:56,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:56,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:01:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:01:56,978 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) [2022-02-10 03:01:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:57,313 INFO L93 Difference]: Finished difference Result 142 states and 369 transitions. [2022-02-10 03:01:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:01:57,314 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 [2022-02-10 03:01:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:57,314 INFO L225 Difference]: With dead ends: 142 [2022-02-10 03:01:57,314 INFO L226 Difference]: Without dead ends: 139 [2022-02-10 03:01:57,315 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 [2022-02-10 03:01:57,315 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 [2022-02-10 03:01:57,315 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] [2022-02-10 03:01:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-10 03:01:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 113. [2022-02-10 03:01:57,317 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) [2022-02-10 03:01:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 297 transitions. [2022-02-10 03:01:57,317 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 297 transitions. Word has length 14 [2022-02-10 03:01:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:57,317 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 297 transitions. [2022-02-10 03:01:57,317 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) [2022-02-10 03:01:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 297 transitions. [2022-02-10 03:01:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:57,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:57,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:57,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-10 03:01:57,525 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 [2022-02-10 03:01:57,525 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:57,526 INFO L85 PathProgramCache]: Analyzing trace with hash -844740799, now seen corresponding path program 56 times [2022-02-10 03:01:57,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:57,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691093443] [2022-02-10 03:01:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:57,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:01:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:57,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:01:57,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691093443] [2022-02-10 03:01:57,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691093443] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:01:57,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519530268] [2022-02-10 03:01:57,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:01:57,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:01:57,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:01:57,772 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) [2022-02-10 03:01:57,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-10 03:01:57,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:01:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:01:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:01:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:01:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:01:58,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:58,145 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 [2022-02-10 03:01:58,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:58,148 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:01:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:58,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:01:58,858 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:01:58,858 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 [2022-02-10 03:01:58,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:01:58,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:01:58,876 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 [2022-02-10 03:01:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:01:59,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519530268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:01:59,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:01:59,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-10 03:01:59,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314339753] [2022-02-10 03:01:59,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:01:59,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:01:59,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:01:59,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:01:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:01:59,189 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) [2022-02-10 03:01:59,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:01:59,583 INFO L93 Difference]: Finished difference Result 130 states and 326 transitions. [2022-02-10 03:01:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:01:59,583 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 [2022-02-10 03:01:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:01:59,583 INFO L225 Difference]: With dead ends: 130 [2022-02-10 03:01:59,584 INFO L226 Difference]: Without dead ends: 127 [2022-02-10 03:01:59,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:01:59,584 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:01:59,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 329 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-02-10 03:01:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-10 03:01:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2022-02-10 03:01:59,596 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) [2022-02-10 03:01:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 303 transitions. [2022-02-10 03:01:59,596 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 303 transitions. Word has length 14 [2022-02-10 03:01:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:01:59,596 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 303 transitions. [2022-02-10 03:01:59,596 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) [2022-02-10 03:01:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 303 transitions. [2022-02-10 03:01:59,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:01:59,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:01:59,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:01:59,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-10 03:01:59,811 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 [2022-02-10 03:01:59,811 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:01:59,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:01:59,812 INFO L85 PathProgramCache]: Analyzing trace with hash 884306535, now seen corresponding path program 57 times [2022-02-10 03:01:59,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:01:59,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213242235] [2022-02-10 03:01:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:01:59,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:01:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:00,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:00,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213242235] [2022-02-10 03:02:00,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213242235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:00,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18179849] [2022-02-10 03:02:00,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:00,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:00,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:00,012 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) [2022-02-10 03:02:00,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-10 03:02:00,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:02:00,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:02:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:00,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:00,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:00,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:00,364 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 [2022-02-10 03:02:00,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:00,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:00,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:00,973 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:02:00,974 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 [2022-02-10 03:02:00,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:01,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:01,007 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 [2022-02-10 03:02:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:01,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18179849] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:01,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:01,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:02:01,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520383277] [2022-02-10 03:02:01,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:01,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:02:01,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:01,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:02:01,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:02:01,258 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) [2022-02-10 03:02:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:01,539 INFO L93 Difference]: Finished difference Result 145 states and 350 transitions. [2022-02-10 03:02:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:02:01,539 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 [2022-02-10 03:02:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:01,540 INFO L225 Difference]: With dead ends: 145 [2022-02-10 03:02:01,540 INFO L226 Difference]: Without dead ends: 139 [2022-02-10 03:02:01,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:02:01,540 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 [2022-02-10 03:02:01,540 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] [2022-02-10 03:02:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-10 03:02:01,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2022-02-10 03:02:01,542 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) [2022-02-10 03:02:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 306 transitions. [2022-02-10 03:02:01,542 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 306 transitions. Word has length 14 [2022-02-10 03:02:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:01,542 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 306 transitions. [2022-02-10 03:02:01,542 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) [2022-02-10 03:02:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 306 transitions. [2022-02-10 03:02:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:02:01,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:01,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:01,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:01,743 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 [2022-02-10 03:02:01,744 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:01,744 INFO L85 PathProgramCache]: Analyzing trace with hash -605098461, now seen corresponding path program 58 times [2022-02-10 03:02:01,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:01,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633835258] [2022-02-10 03:02:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:01,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:02,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:02,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633835258] [2022-02-10 03:02:02,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633835258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:02,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236651294] [2022-02-10 03:02:02,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:02,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:02,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:02,032 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) [2022-02-10 03:02:02,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-10 03:02:02,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:02,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:02,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 03:02:02,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:02,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:02,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:02,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:02,443 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 [2022-02-10 03:02:02,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:02,446 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-10 03:02:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:02,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:03,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:03,328 INFO L353 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2022-02-10 03:02:03,328 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 [2022-02-10 03:02:03,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:03,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:03,345 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 [2022-02-10 03:02:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:03,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236651294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:03,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:03,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-10 03:02:03,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590191588] [2022-02-10 03:02:03,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:03,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:02:03,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:02:03,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:02:03,583 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) [2022-02-10 03:02:04,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:04,113 INFO L93 Difference]: Finished difference Result 153 states and 364 transitions. [2022-02-10 03:02:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:02:04,113 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 [2022-02-10 03:02:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:04,114 INFO L225 Difference]: With dead ends: 153 [2022-02-10 03:02:04,114 INFO L226 Difference]: Without dead ends: 145 [2022-02-10 03:02:04,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:02:04,114 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 [2022-02-10 03:02:04,114 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] [2022-02-10 03:02:04,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-10 03:02:04,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2022-02-10 03:02:04,116 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) [2022-02-10 03:02:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 303 transitions. [2022-02-10 03:02:04,116 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 303 transitions. Word has length 14 [2022-02-10 03:02:04,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:04,116 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 303 transitions. [2022-02-10 03:02:04,116 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) [2022-02-10 03:02:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 303 transitions. [2022-02-10 03:02:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:02:04,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:04,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:04,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-10 03:02:04,317 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 [2022-02-10 03:02:04,317 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash -597368063, now seen corresponding path program 59 times [2022-02-10 03:02:04,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:04,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525088943] [2022-02-10 03:02:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:04,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:04,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:04,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525088943] [2022-02-10 03:02:04,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525088943] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:04,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604815473] [2022-02-10 03:02:04,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:02:04,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:04,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:04,603 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) [2022-02-10 03:02:04,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-10 03:02:04,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:02:04,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:02:04,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:04,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:04,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:04,929 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 [2022-02-10 03:02:04,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:04,931 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 60 treesize of output 48 [2022-02-10 03:02:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:04,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:05,591 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-10 03:02:05,592 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 [2022-02-10 03:02:05,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:05,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:05,608 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 [2022-02-10 03:02:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:05,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604815473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:05,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:05,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-10 03:02:05,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513064872] [2022-02-10 03:02:05,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:05,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:02:05,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:05,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:02:05,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:02:05,846 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) [2022-02-10 03:02:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:06,946 INFO L93 Difference]: Finished difference Result 193 states and 425 transitions. [2022-02-10 03:02:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:02:06,947 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 [2022-02-10 03:02:06,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:06,947 INFO L225 Difference]: With dead ends: 193 [2022-02-10 03:02:06,948 INFO L226 Difference]: Without dead ends: 184 [2022-02-10 03:02:06,948 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 [2022-02-10 03:02:06,948 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 [2022-02-10 03:02:06,948 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] [2022-02-10 03:02:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-10 03:02:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 125. [2022-02-10 03:02:06,950 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) [2022-02-10 03:02:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 339 transitions. [2022-02-10 03:02:06,950 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 339 transitions. Word has length 14 [2022-02-10 03:02:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:06,950 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 339 transitions. [2022-02-10 03:02:06,950 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) [2022-02-10 03:02:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 339 transitions. [2022-02-10 03:02:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:02:06,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:06,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:06,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-10 03:02:07,151 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 [2022-02-10 03:02:07,151 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:07,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1262043321, now seen corresponding path program 60 times [2022-02-10 03:02:07,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:07,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073451945] [2022-02-10 03:02:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:07,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:07,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:07,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073451945] [2022-02-10 03:02:07,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073451945] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:07,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135511204] [2022-02-10 03:02:07,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:02:07,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:07,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:07,348 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) [2022-02-10 03:02:07,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-10 03:02:07,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-10 03:02:07,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:02:07,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:07,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:07,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:07,660 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 [2022-02-10 03:02:07,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:07,662 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 58 treesize of output 46 [2022-02-10 03:02:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:07,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:08,126 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-10 03:02:08,127 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 [2022-02-10 03:02:08,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:08,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:08,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:08,162 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 [2022-02-10 03:02:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:08,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135511204] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:08,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:08,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:02:08,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458183423] [2022-02-10 03:02:08,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:08,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:02:08,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:08,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:02:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:02:08,432 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) [2022-02-10 03:02:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:08,762 INFO L93 Difference]: Finished difference Result 177 states and 427 transitions. [2022-02-10 03:02:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:02:08,762 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 [2022-02-10 03:02:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:08,763 INFO L225 Difference]: With dead ends: 177 [2022-02-10 03:02:08,763 INFO L226 Difference]: Without dead ends: 168 [2022-02-10 03:02:08,763 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 [2022-02-10 03:02:08,763 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:08,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 35 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 289 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-02-10 03:02:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-10 03:02:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 131. [2022-02-10 03:02:08,765 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) [2022-02-10 03:02:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 358 transitions. [2022-02-10 03:02:08,765 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 358 transitions. Word has length 14 [2022-02-10 03:02:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:08,766 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 358 transitions. [2022-02-10 03:02:08,766 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) [2022-02-10 03:02:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 358 transitions. [2022-02-10 03:02:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:02:08,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:08,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:08,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:08,974 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 [2022-02-10 03:02:08,974 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:08,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1303876641, now seen corresponding path program 61 times [2022-02-10 03:02:08,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:08,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498427703] [2022-02-10 03:02:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:08,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:09,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:09,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498427703] [2022-02-10 03:02:09,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498427703] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:09,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070898576] [2022-02-10 03:02:09,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:02:09,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:09,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:09,178 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) [2022-02-10 03:02:09,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-10 03:02:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:09,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:02:09,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:09,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:09,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:09,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:09,489 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 [2022-02-10 03:02:09,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:09,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:09,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:09,959 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-10 03:02:09,959 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 [2022-02-10 03:02:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:09,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:09,979 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 [2022-02-10 03:02:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:10,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070898576] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:10,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:10,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:02:10,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865166125] [2022-02-10 03:02:10,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:10,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:02:10,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:02:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:02:10,306 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) [2022-02-10 03:02:10,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:10,706 INFO L93 Difference]: Finished difference Result 163 states and 412 transitions. [2022-02-10 03:02:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:02:10,706 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 [2022-02-10 03:02:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:10,707 INFO L225 Difference]: With dead ends: 163 [2022-02-10 03:02:10,707 INFO L226 Difference]: Without dead ends: 157 [2022-02-10 03:02:10,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:02:10,707 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 [2022-02-10 03:02:10,707 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] [2022-02-10 03:02:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-02-10 03:02:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 129. [2022-02-10 03:02:10,709 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) [2022-02-10 03:02:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 352 transitions. [2022-02-10 03:02:10,709 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 352 transitions. Word has length 14 [2022-02-10 03:02:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:10,709 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 352 transitions. [2022-02-10 03:02:10,709 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) [2022-02-10 03:02:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 352 transitions. [2022-02-10 03:02:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:02:10,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:10,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:10,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-10 03:02:10,910 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 [2022-02-10 03:02:10,910 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:10,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1720196257, now seen corresponding path program 62 times [2022-02-10 03:02:10,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:10,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791160126] [2022-02-10 03:02:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:10,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:11,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:11,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791160126] [2022-02-10 03:02:11,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791160126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:11,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655118552] [2022-02-10 03:02:11,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:11,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:11,219 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) [2022-02-10 03:02:11,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-10 03:02:11,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:11,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:02:11,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:11,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:11,564 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 [2022-02-10 03:02:11,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:11,566 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 [2022-02-10 03:02:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:11,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:12,107 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-10 03:02:12,108 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 [2022-02-10 03:02:12,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:12,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:12,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:12,125 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 [2022-02-10 03:02:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:12,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655118552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:12,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:12,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-10 03:02:12,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994070232] [2022-02-10 03:02:12,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:12,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:02:12,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:02:12,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:02:12,444 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) [2022-02-10 03:02:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:12,984 INFO L93 Difference]: Finished difference Result 182 states and 446 transitions. [2022-02-10 03:02:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:02:12,985 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 [2022-02-10 03:02:12,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:12,985 INFO L225 Difference]: With dead ends: 182 [2022-02-10 03:02:12,985 INFO L226 Difference]: Without dead ends: 170 [2022-02-10 03:02:12,986 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 [2022-02-10 03:02:12,986 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:12,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 489 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-02-10 03:02:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-10 03:02:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2022-02-10 03:02:12,988 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) [2022-02-10 03:02:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 383 transitions. [2022-02-10 03:02:12,988 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 383 transitions. Word has length 14 [2022-02-10 03:02:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:12,988 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 383 transitions. [2022-02-10 03:02:12,989 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) [2022-02-10 03:02:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 383 transitions. [2022-02-10 03:02:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:02:12,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:12,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:13,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-10 03:02:13,203 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 [2022-02-10 03:02:13,203 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1093096441, now seen corresponding path program 63 times [2022-02-10 03:02:13,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:13,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561427313] [2022-02-10 03:02:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:13,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:13,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:13,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561427313] [2022-02-10 03:02:13,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561427313] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:13,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59498112] [2022-02-10 03:02:13,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:13,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:13,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:13,433 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) [2022-02-10 03:02:13,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-10 03:02:13,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:02:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:13,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:02:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:02:13,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:13,712 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 [2022-02-10 03:02:13,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:13,714 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 60 treesize of output 48 [2022-02-10 03:02:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:13,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:14,160 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-02-10 03:02:14,160 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 [2022-02-10 03:02:14,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:14,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:14,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:14,194 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 [2022-02-10 03:02:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:14,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59498112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:14,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:14,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-10 03:02:14,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409621256] [2022-02-10 03:02:14,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:14,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:02:14,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:14,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:02:14,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:02:14,582 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) [2022-02-10 03:02:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:14,953 INFO L93 Difference]: Finished difference Result 204 states and 500 transitions. [2022-02-10 03:02:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:02:14,953 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 [2022-02-10 03:02:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:14,954 INFO L225 Difference]: With dead ends: 204 [2022-02-10 03:02:14,954 INFO L226 Difference]: Without dead ends: 198 [2022-02-10 03:02:14,954 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 [2022-02-10 03:02:14,954 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 [2022-02-10 03:02:14,954 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] [2022-02-10 03:02:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-10 03:02:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 140. [2022-02-10 03:02:14,957 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) [2022-02-10 03:02:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 392 transitions. [2022-02-10 03:02:14,957 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 392 transitions. Word has length 14 [2022-02-10 03:02:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:14,957 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 392 transitions. [2022-02-10 03:02:14,957 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) [2022-02-10 03:02:14,957 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 392 transitions. [2022-02-10 03:02:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:14,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:14,958 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:14,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-10 03:02:15,158 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 [2022-02-10 03:02:15,158 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1862349497, now seen corresponding path program 64 times [2022-02-10 03:02:15,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:15,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723039915] [2022-02-10 03:02:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:15,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:15,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:15,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723039915] [2022-02-10 03:02:15,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723039915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:15,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021173376] [2022-02-10 03:02:15,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:15,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:15,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:15,337 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) [2022-02-10 03:02:15,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-10 03:02:15,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:15,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:15,473 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 37 treesize of output 31 [2022-02-10 03:02:15,475 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-10 03:02:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:15,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:15,577 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:15,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:15,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:15,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021173376] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:15,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:15,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 03:02:15,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657367392] [2022-02-10 03:02:15,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:15,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:02:15,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:15,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:02:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:02:15,592 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) [2022-02-10 03:02:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:15,817 INFO L93 Difference]: Finished difference Result 177 states and 473 transitions. [2022-02-10 03:02:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:02:15,817 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 [2022-02-10 03:02:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:15,818 INFO L225 Difference]: With dead ends: 177 [2022-02-10 03:02:15,818 INFO L226 Difference]: Without dead ends: 173 [2022-02-10 03:02:15,818 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 [2022-02-10 03:02:15,818 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 [2022-02-10 03:02:15,819 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] [2022-02-10 03:02:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-10 03:02:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 139. [2022-02-10 03:02:15,822 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) [2022-02-10 03:02:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 390 transitions. [2022-02-10 03:02:15,822 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 390 transitions. Word has length 15 [2022-02-10 03:02:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:15,822 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 390 transitions. [2022-02-10 03:02:15,822 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) [2022-02-10 03:02:15,823 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 390 transitions. [2022-02-10 03:02:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:15,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:15,823 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:15,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-10 03:02:16,036 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 [2022-02-10 03:02:16,036 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:16,037 INFO L85 PathProgramCache]: Analyzing trace with hash -757032713, now seen corresponding path program 65 times [2022-02-10 03:02:16,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:16,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466815231] [2022-02-10 03:02:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:16,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:16,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:16,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466815231] [2022-02-10 03:02:16,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466815231] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:16,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056796051] [2022-02-10 03:02:16,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:02:16,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:16,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:16,157 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) [2022-02-10 03:02:16,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-10 03:02:16,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:02:16,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:16,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:16,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:16,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:16,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:16,275 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 7 treesize of output 1 [2022-02-10 03:02:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:16,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:16,383 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:16,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:16,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:16,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056796051] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:16,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:16,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 03:02:16,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519999136] [2022-02-10 03:02:16,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:16,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:02:16,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:16,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:02:16,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:02:16,395 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) [2022-02-10 03:02:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:16,574 INFO L93 Difference]: Finished difference Result 179 states and 481 transitions. [2022-02-10 03:02:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-10 03:02:16,574 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 [2022-02-10 03:02:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:16,575 INFO L225 Difference]: With dead ends: 179 [2022-02-10 03:02:16,575 INFO L226 Difference]: Without dead ends: 179 [2022-02-10 03:02:16,575 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 [2022-02-10 03:02:16,575 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 [2022-02-10 03:02:16,575 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] [2022-02-10 03:02:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-10 03:02:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2022-02-10 03:02:16,577 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) [2022-02-10 03:02:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 393 transitions. [2022-02-10 03:02:16,577 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 393 transitions. Word has length 15 [2022-02-10 03:02:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:16,578 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 393 transitions. [2022-02-10 03:02:16,578 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) [2022-02-10 03:02:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 393 transitions. [2022-02-10 03:02:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:16,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:16,579 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:16,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-10 03:02:16,779 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 [2022-02-10 03:02:16,779 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:16,780 INFO L85 PathProgramCache]: Analyzing trace with hash -313196909, now seen corresponding path program 66 times [2022-02-10 03:02:16,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:16,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200598679] [2022-02-10 03:02:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:16,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:16,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:16,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200598679] [2022-02-10 03:02:16,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200598679] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:16,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173266337] [2022-02-10 03:02:16,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:02:16,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:16,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:16,867 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) [2022-02-10 03:02:16,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-10 03:02:16,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:02:16,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:16,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:16,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:16,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:16,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:16,986 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:02:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:17,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:17,147 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:17,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:17,148 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 21 treesize of output 13 [2022-02-10 03:02:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:17,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173266337] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:17,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:17,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:17,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367808056] [2022-02-10 03:02:17,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:17,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:17,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:17,163 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) [2022-02-10 03:02:17,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:17,466 INFO L93 Difference]: Finished difference Result 216 states and 533 transitions. [2022-02-10 03:02:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:02:17,466 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 [2022-02-10 03:02:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:17,467 INFO L225 Difference]: With dead ends: 216 [2022-02-10 03:02:17,467 INFO L226 Difference]: Without dead ends: 216 [2022-02-10 03:02:17,467 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 [2022-02-10 03:02:17,467 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 [2022-02-10 03:02:17,468 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] [2022-02-10 03:02:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-10 03:02:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 144. [2022-02-10 03:02:17,470 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) [2022-02-10 03:02:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 407 transitions. [2022-02-10 03:02:17,470 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 407 transitions. Word has length 15 [2022-02-10 03:02:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:17,470 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 407 transitions. [2022-02-10 03:02:17,470 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) [2022-02-10 03:02:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 407 transitions. [2022-02-10 03:02:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:17,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:17,471 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:17,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:17,680 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 [2022-02-10 03:02:17,680 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:17,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash 488419319, now seen corresponding path program 67 times [2022-02-10 03:02:17,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:17,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779405615] [2022-02-10 03:02:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:17,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:17,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:17,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779405615] [2022-02-10 03:02:17,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779405615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:17,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926988569] [2022-02-10 03:02:17,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:02:17,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:17,768 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) [2022-02-10 03:02:17,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-10 03:02:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:17,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:17,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:17,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:17,884 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 [2022-02-10 03:02:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:17,886 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 [2022-02-10 03:02:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:17,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:18,050 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:18,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:18,052 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 9 treesize of output 7 [2022-02-10 03:02:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:18,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926988569] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:18,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:18,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-10 03:02:18,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014488498] [2022-02-10 03:02:18,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:18,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:02:18,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:18,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:02:18,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:02:18,062 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) [2022-02-10 03:02:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:19,152 INFO L93 Difference]: Finished difference Result 263 states and 615 transitions. [2022-02-10 03:02:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-10 03:02:19,153 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 [2022-02-10 03:02:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:19,154 INFO L225 Difference]: With dead ends: 263 [2022-02-10 03:02:19,154 INFO L226 Difference]: Without dead ends: 258 [2022-02-10 03:02:19,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=467, Invalid=2289, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 03:02:19,154 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 [2022-02-10 03:02:19,154 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] [2022-02-10 03:02:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-10 03:02:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 156. [2022-02-10 03:02:19,157 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) [2022-02-10 03:02:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 445 transitions. [2022-02-10 03:02:19,157 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 445 transitions. Word has length 15 [2022-02-10 03:02:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:19,157 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 445 transitions. [2022-02-10 03:02:19,157 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) [2022-02-10 03:02:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 445 transitions. [2022-02-10 03:02:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:19,158 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:19,158 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:19,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:19,373 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 [2022-02-10 03:02:19,374 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2088204271, now seen corresponding path program 68 times [2022-02-10 03:02:19,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:19,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769067301] [2022-02-10 03:02:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:19,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:19,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:19,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769067301] [2022-02-10 03:02:19,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769067301] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:19,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542677391] [2022-02-10 03:02:19,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:19,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:19,495 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) [2022-02-10 03:02:19,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-10 03:02:19,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:19,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:19,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:19,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:19,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:19,614 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:02:19,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:19,616 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 35 treesize of output 27 [2022-02-10 03:02:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:19,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:19,764 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:19,764 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 24 treesize of output 21 [2022-02-10 03:02:19,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:19,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542677391] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:19,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:19,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:19,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535949062] [2022-02-10 03:02:19,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:19,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:19,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:19,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:19,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:19,775 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) [2022-02-10 03:02:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:20,503 INFO L93 Difference]: Finished difference Result 240 states and 592 transitions. [2022-02-10 03:02:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:02:20,504 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 [2022-02-10 03:02:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:20,505 INFO L225 Difference]: With dead ends: 240 [2022-02-10 03:02:20,505 INFO L226 Difference]: Without dead ends: 240 [2022-02-10 03:02:20,505 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 [2022-02-10 03:02:20,505 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 [2022-02-10 03:02:20,505 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] [2022-02-10 03:02:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-10 03:02:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 153. [2022-02-10 03:02:20,508 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) [2022-02-10 03:02:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 433 transitions. [2022-02-10 03:02:20,508 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 433 transitions. Word has length 15 [2022-02-10 03:02:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:20,508 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 433 transitions. [2022-02-10 03:02:20,508 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) [2022-02-10 03:02:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 433 transitions. [2022-02-10 03:02:20,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:20,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:20,509 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:20,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:20,719 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 [2022-02-10 03:02:20,719 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 496149717, now seen corresponding path program 69 times [2022-02-10 03:02:20,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:20,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496409054] [2022-02-10 03:02:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:20,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:20,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:20,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496409054] [2022-02-10 03:02:20,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496409054] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:20,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607298974] [2022-02-10 03:02:20,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:20,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:20,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:20,793 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) [2022-02-10 03:02:20,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-10 03:02:20,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:02:20,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:20,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:20,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:20,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:20,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:20,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:20,950 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:02:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:20,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:21,092 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:21,092 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:02:21,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:21,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607298974] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:21,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:21,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:21,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113912391] [2022-02-10 03:02:21,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:21,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:21,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:21,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:21,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:21,112 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) [2022-02-10 03:02:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:21,609 INFO L93 Difference]: Finished difference Result 219 states and 571 transitions. [2022-02-10 03:02:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:02:21,609 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 [2022-02-10 03:02:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:21,610 INFO L225 Difference]: With dead ends: 219 [2022-02-10 03:02:21,610 INFO L226 Difference]: Without dead ends: 219 [2022-02-10 03:02:21,610 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 [2022-02-10 03:02:21,611 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 [2022-02-10 03:02:21,611 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] [2022-02-10 03:02:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-10 03:02:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 155. [2022-02-10 03:02:21,613 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) [2022-02-10 03:02:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 438 transitions. [2022-02-10 03:02:21,613 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 438 transitions. Word has length 15 [2022-02-10 03:02:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:21,613 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 438 transitions. [2022-02-10 03:02:21,613 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) [2022-02-10 03:02:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 438 transitions. [2022-02-10 03:02:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:21,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:21,614 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:21,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:21,827 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 [2022-02-10 03:02:21,827 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1505045545, now seen corresponding path program 70 times [2022-02-10 03:02:21,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:21,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869780107] [2022-02-10 03:02:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:21,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:21,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:21,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869780107] [2022-02-10 03:02:21,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869780107] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:21,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760951129] [2022-02-10 03:02:21,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:21,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:21,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:21,906 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) [2022-02-10 03:02:21,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-10 03:02:21,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:21,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:22,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:22,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:22,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:22,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:22,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:22,036 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-10 03:02:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:22,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:22,130 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:22,130 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:02:22,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:22,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760951129] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:22,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:22,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:02:22,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613446240] [2022-02-10 03:02:22,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:22,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:22,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:22,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:22,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:22,148 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) [2022-02-10 03:02:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:22,392 INFO L93 Difference]: Finished difference Result 232 states and 594 transitions. [2022-02-10 03:02:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:02:22,392 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 [2022-02-10 03:02:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:22,404 INFO L225 Difference]: With dead ends: 232 [2022-02-10 03:02:22,404 INFO L226 Difference]: Without dead ends: 232 [2022-02-10 03:02:22,404 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 [2022-02-10 03:02:22,404 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:22,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 64 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:02:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-10 03:02:22,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 173. [2022-02-10 03:02:22,407 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) [2022-02-10 03:02:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 507 transitions. [2022-02-10 03:02:22,407 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 507 transitions. Word has length 15 [2022-02-10 03:02:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:22,407 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 507 transitions. [2022-02-10 03:02:22,407 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) [2022-02-10 03:02:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 507 transitions. [2022-02-10 03:02:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:22,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:22,408 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:22,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-10 03:02:22,608 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 [2022-02-10 03:02:22,608 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:22,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1870221043, now seen corresponding path program 71 times [2022-02-10 03:02:22,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:22,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450382183] [2022-02-10 03:02:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:22,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:22,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:22,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450382183] [2022-02-10 03:02:22,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450382183] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:22,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125063571] [2022-02-10 03:02:22,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:02:22,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:22,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:22,676 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) [2022-02-10 03:02:22,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-10 03:02:22,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:02:22,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:22,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:22,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:22,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:22,800 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 39 treesize of output 33 [2022-02-10 03:02:22,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:22,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:22,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:22,890 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:22,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:22,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:22,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125063571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:22,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:22,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:02:22,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906781971] [2022-02-10 03:02:22,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:22,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:22,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:22,911 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) [2022-02-10 03:02:23,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:23,172 INFO L93 Difference]: Finished difference Result 216 states and 565 transitions. [2022-02-10 03:02:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:02:23,173 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 [2022-02-10 03:02:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:23,174 INFO L225 Difference]: With dead ends: 216 [2022-02-10 03:02:23,174 INFO L226 Difference]: Without dead ends: 212 [2022-02-10 03:02:23,174 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 [2022-02-10 03:02:23,174 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 [2022-02-10 03:02:23,174 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] [2022-02-10 03:02:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-10 03:02:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 174. [2022-02-10 03:02:23,176 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) [2022-02-10 03:02:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 505 transitions. [2022-02-10 03:02:23,177 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 505 transitions. Word has length 15 [2022-02-10 03:02:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:23,177 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 505 transitions. [2022-02-10 03:02:23,177 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) [2022-02-10 03:02:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 505 transitions. [2022-02-10 03:02:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:23,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:23,177 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:23,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-10 03:02:23,379 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 [2022-02-10 03:02:23,379 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:23,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1497315147, now seen corresponding path program 72 times [2022-02-10 03:02:23,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:23,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16527106] [2022-02-10 03:02:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:23,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:23,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:23,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16527106] [2022-02-10 03:02:23,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16527106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:23,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921284846] [2022-02-10 03:02:23,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:02:23,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:23,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:23,485 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) [2022-02-10 03:02:23,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-10 03:02:23,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:02:23,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:23,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:23,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:23,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:23,589 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 43 treesize of output 35 [2022-02-10 03:02:23,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:23,591 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 35 treesize of output 27 [2022-02-10 03:02:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:23,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:23,731 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:23,732 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:02:23,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:23,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921284846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:23,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:23,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:02:23,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006874566] [2022-02-10 03:02:23,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:23,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:23,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:23,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:23,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:23,748 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) [2022-02-10 03:02:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:24,029 INFO L93 Difference]: Finished difference Result 278 states and 662 transitions. [2022-02-10 03:02:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:02:24,030 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 [2022-02-10 03:02:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:24,031 INFO L225 Difference]: With dead ends: 278 [2022-02-10 03:02:24,031 INFO L226 Difference]: Without dead ends: 277 [2022-02-10 03:02:24,031 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 [2022-02-10 03:02:24,031 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:24,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 62 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:02:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-02-10 03:02:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 177. [2022-02-10 03:02:24,034 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) [2022-02-10 03:02:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 515 transitions. [2022-02-10 03:02:24,034 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 515 transitions. Word has length 15 [2022-02-10 03:02:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:24,034 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 515 transitions. [2022-02-10 03:02:24,034 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) [2022-02-10 03:02:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 515 transitions. [2022-02-10 03:02:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:24,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:24,035 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:24,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:24,249 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 [2022-02-10 03:02:24,250 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash -695698919, now seen corresponding path program 73 times [2022-02-10 03:02:24,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:24,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481411940] [2022-02-10 03:02:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:24,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:24,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:24,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481411940] [2022-02-10 03:02:24,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481411940] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:24,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441557002] [2022-02-10 03:02:24,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:02:24,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:24,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:24,317 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) [2022-02-10 03:02:24,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-10 03:02:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:24,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:24,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:24,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:24,407 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 43 treesize of output 35 [2022-02-10 03:02:24,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:24,409 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 35 treesize of output 27 [2022-02-10 03:02:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:24,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:24,526 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:24,526 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:02:24,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:24,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441557002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:24,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:24,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:02:24,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076947783] [2022-02-10 03:02:24,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:24,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:24,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:24,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:24,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:24,551 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) [2022-02-10 03:02:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:24,909 INFO L93 Difference]: Finished difference Result 250 states and 618 transitions. [2022-02-10 03:02:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:02:24,909 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 [2022-02-10 03:02:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:24,910 INFO L225 Difference]: With dead ends: 250 [2022-02-10 03:02:24,910 INFO L226 Difference]: Without dead ends: 247 [2022-02-10 03:02:24,910 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 [2022-02-10 03:02:24,910 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 [2022-02-10 03:02:24,910 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] [2022-02-10 03:02:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-02-10 03:02:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 181. [2022-02-10 03:02:24,913 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) [2022-02-10 03:02:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 523 transitions. [2022-02-10 03:02:24,913 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 523 transitions. Word has length 15 [2022-02-10 03:02:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:24,913 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 523 transitions. [2022-02-10 03:02:24,913 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) [2022-02-10 03:02:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 523 transitions. [2022-02-10 03:02:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:24,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:24,914 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:24,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-10 03:02:25,129 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 [2022-02-10 03:02:25,130 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:25,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1022644787, now seen corresponding path program 74 times [2022-02-10 03:02:25,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:25,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877992345] [2022-02-10 03:02:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:25,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:25,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:25,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877992345] [2022-02-10 03:02:25,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877992345] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:25,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833640879] [2022-02-10 03:02:25,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:25,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:25,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:25,198 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) [2022-02-10 03:02:25,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-10 03:02:25,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:25,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:25,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:25,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:25,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:25,289 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 43 treesize of output 35 [2022-02-10 03:02:25,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:25,290 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 35 treesize of output 27 [2022-02-10 03:02:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:25,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:25,398 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:25,398 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 42 treesize of output 33 [2022-02-10 03:02:25,400 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 21 treesize of output 13 [2022-02-10 03:02:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:25,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833640879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:25,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:25,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:02:25,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726870150] [2022-02-10 03:02:25,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:25,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:25,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:25,419 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) [2022-02-10 03:02:25,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:25,683 INFO L93 Difference]: Finished difference Result 236 states and 594 transitions. [2022-02-10 03:02:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:02:25,683 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 [2022-02-10 03:02:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:25,684 INFO L225 Difference]: With dead ends: 236 [2022-02-10 03:02:25,684 INFO L226 Difference]: Without dead ends: 236 [2022-02-10 03:02:25,684 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 [2022-02-10 03:02:25,685 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 [2022-02-10 03:02:25,685 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] [2022-02-10 03:02:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-10 03:02:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 177. [2022-02-10 03:02:25,687 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) [2022-02-10 03:02:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 505 transitions. [2022-02-10 03:02:25,687 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 505 transitions. Word has length 15 [2022-02-10 03:02:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:25,687 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 505 transitions. [2022-02-10 03:02:25,688 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) [2022-02-10 03:02:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 505 transitions. [2022-02-10 03:02:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:25,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:25,688 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:25,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:25,904 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 [2022-02-10 03:02:25,904 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:25,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1379198957, now seen corresponding path program 75 times [2022-02-10 03:02:25,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:25,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245591654] [2022-02-10 03:02:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:25,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:25,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:25,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245591654] [2022-02-10 03:02:25,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245591654] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:25,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653549117] [2022-02-10 03:02:25,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:25,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:25,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:25,980 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) [2022-02-10 03:02:25,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-10 03:02:26,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:02:26,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:26,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:26,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:26,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:26,074 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:02:26,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:26,076 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 35 treesize of output 27 [2022-02-10 03:02:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:26,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:26,198 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:26,199 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 42 treesize of output 33 [2022-02-10 03:02:26,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:26,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653549117] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:26,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:26,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:02:26,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222835626] [2022-02-10 03:02:26,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:26,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:26,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:26,222 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) [2022-02-10 03:02:26,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:26,657 INFO L93 Difference]: Finished difference Result 242 states and 605 transitions. [2022-02-10 03:02:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:02:26,657 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 [2022-02-10 03:02:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:26,658 INFO L225 Difference]: With dead ends: 242 [2022-02-10 03:02:26,658 INFO L226 Difference]: Without dead ends: 240 [2022-02-10 03:02:26,659 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 [2022-02-10 03:02:26,659 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:26,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 46 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-10 03:02:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 183. [2022-02-10 03:02:26,661 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) [2022-02-10 03:02:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 521 transitions. [2022-02-10 03:02:26,662 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 521 transitions. Word has length 15 [2022-02-10 03:02:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:26,662 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 521 transitions. [2022-02-10 03:02:26,662 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) [2022-02-10 03:02:26,662 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 521 transitions. [2022-02-10 03:02:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:26,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:26,662 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:26,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-02-10 03:02:26,867 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 [2022-02-10 03:02:26,867 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash 349848377, now seen corresponding path program 76 times [2022-02-10 03:02:26,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:26,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136876109] [2022-02-10 03:02:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:26,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:26,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:26,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136876109] [2022-02-10 03:02:26,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136876109] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:26,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856647769] [2022-02-10 03:02:26,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:26,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:26,946 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) [2022-02-10 03:02:26,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-10 03:02:26,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:26,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:26,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:26,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:27,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:27,090 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 39 treesize of output 33 [2022-02-10 03:02:27,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:27,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:27,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:27,199 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:27,199 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 42 treesize of output 33 [2022-02-10 03:02:27,201 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 21 treesize of output 13 [2022-02-10 03:02:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:27,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856647769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:27,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:27,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:02:27,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976735071] [2022-02-10 03:02:27,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:27,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:27,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:27,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:27,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:27,220 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) [2022-02-10 03:02:27,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:27,521 INFO L93 Difference]: Finished difference Result 215 states and 565 transitions. [2022-02-10 03:02:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:02:27,521 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 [2022-02-10 03:02:27,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:27,522 INFO L225 Difference]: With dead ends: 215 [2022-02-10 03:02:27,522 INFO L226 Difference]: Without dead ends: 211 [2022-02-10 03:02:27,522 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 [2022-02-10 03:02:27,522 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 [2022-02-10 03:02:27,523 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] [2022-02-10 03:02:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-10 03:02:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 184. [2022-02-10 03:02:27,525 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) [2022-02-10 03:02:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 519 transitions. [2022-02-10 03:02:27,525 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 519 transitions. Word has length 15 [2022-02-10 03:02:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:27,525 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 519 transitions. [2022-02-10 03:02:27,525 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) [2022-02-10 03:02:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 519 transitions. [2022-02-10 03:02:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:27,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:27,526 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:27,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:27,726 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 [2022-02-10 03:02:27,726 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2117593779, now seen corresponding path program 77 times [2022-02-10 03:02:27,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:27,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914555247] [2022-02-10 03:02:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:27,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:27,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:27,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914555247] [2022-02-10 03:02:27,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914555247] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:27,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352080167] [2022-02-10 03:02:27,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:02:27,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:27,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:27,797 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) [2022-02-10 03:02:27,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-10 03:02:27,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:02:27,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:27,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:27,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:27,926 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 [2022-02-10 03:02:27,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:27,929 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 [2022-02-10 03:02:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:27,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:28,021 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:28,022 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 28 treesize of output 23 [2022-02-10 03:02:28,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:28,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352080167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:28,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:28,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:02:28,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535033524] [2022-02-10 03:02:28,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:28,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:28,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:28,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:28,040 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) [2022-02-10 03:02:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:28,219 INFO L93 Difference]: Finished difference Result 248 states and 634 transitions. [2022-02-10 03:02:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:02:28,220 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 [2022-02-10 03:02:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:28,221 INFO L225 Difference]: With dead ends: 248 [2022-02-10 03:02:28,221 INFO L226 Difference]: Without dead ends: 248 [2022-02-10 03:02:28,221 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 [2022-02-10 03:02:28,221 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 [2022-02-10 03:02:28,221 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] [2022-02-10 03:02:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-10 03:02:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 188. [2022-02-10 03:02:28,224 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) [2022-02-10 03:02:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 533 transitions. [2022-02-10 03:02:28,224 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 533 transitions. Word has length 15 [2022-02-10 03:02:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:28,224 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 533 transitions. [2022-02-10 03:02:28,224 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) [2022-02-10 03:02:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 533 transitions. [2022-02-10 03:02:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:28,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:28,224 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:28,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-10 03:02:28,431 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 [2022-02-10 03:02:28,431 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:28,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash -569852331, now seen corresponding path program 78 times [2022-02-10 03:02:28,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:28,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348379287] [2022-02-10 03:02:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:28,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:28,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:28,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348379287] [2022-02-10 03:02:28,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348379287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:28,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230327175] [2022-02-10 03:02:28,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:02:28,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:28,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:28,502 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) [2022-02-10 03:02:28,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-10 03:02:28,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:02:28,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:28,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:28,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:28,628 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 29 treesize of output 23 [2022-02-10 03:02:28,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:28,631 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 21 treesize of output 2 [2022-02-10 03:02:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:28,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:28,720 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:28,720 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:02:28,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:28,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230327175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:28,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:28,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:02:28,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519485212] [2022-02-10 03:02:28,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:28,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:28,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:28,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:28,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:28,736 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) [2022-02-10 03:02:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:28,954 INFO L93 Difference]: Finished difference Result 245 states and 622 transitions. [2022-02-10 03:02:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:02:28,954 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 [2022-02-10 03:02:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:28,955 INFO L225 Difference]: With dead ends: 245 [2022-02-10 03:02:28,955 INFO L226 Difference]: Without dead ends: 245 [2022-02-10 03:02:28,955 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 [2022-02-10 03:02:28,955 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 [2022-02-10 03:02:28,956 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] [2022-02-10 03:02:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-10 03:02:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 187. [2022-02-10 03:02:28,958 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) [2022-02-10 03:02:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 529 transitions. [2022-02-10 03:02:28,958 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 529 transitions. Word has length 15 [2022-02-10 03:02:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:28,958 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 529 transitions. [2022-02-10 03:02:28,958 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) [2022-02-10 03:02:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 529 transitions. [2022-02-10 03:02:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:28,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:28,959 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:28,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:29,175 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 [2022-02-10 03:02:29,175 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1913634763, now seen corresponding path program 79 times [2022-02-10 03:02:29,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:29,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921277118] [2022-02-10 03:02:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:29,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:29,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:29,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921277118] [2022-02-10 03:02:29,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921277118] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:29,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991274239] [2022-02-10 03:02:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:02:29,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:29,250 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) [2022-02-10 03:02:29,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-10 03:02:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:29,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:29,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:29,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:29,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:29,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:29,358 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 [2022-02-10 03:02:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:29,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:29,497 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:29,497 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 [2022-02-10 03:02:29,499 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 21 treesize of output 13 [2022-02-10 03:02:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:29,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991274239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:29,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:29,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:29,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254076337] [2022-02-10 03:02:29,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:29,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:29,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:29,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:29,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:29,516 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) [2022-02-10 03:02:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:29,713 INFO L93 Difference]: Finished difference Result 259 states and 647 transitions. [2022-02-10 03:02:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:02:29,713 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 [2022-02-10 03:02:29,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:29,714 INFO L225 Difference]: With dead ends: 259 [2022-02-10 03:02:29,714 INFO L226 Difference]: Without dead ends: 259 [2022-02-10 03:02:29,714 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 [2022-02-10 03:02:29,714 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 [2022-02-10 03:02:29,714 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] [2022-02-10 03:02:29,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-02-10 03:02:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 195. [2022-02-10 03:02:29,717 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) [2022-02-10 03:02:29,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 559 transitions. [2022-02-10 03:02:29,717 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 559 transitions. Word has length 15 [2022-02-10 03:02:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:29,718 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 559 transitions. [2022-02-10 03:02:29,718 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) [2022-02-10 03:02:29,718 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 559 transitions. [2022-02-10 03:02:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:29,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:29,718 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:29,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-02-10 03:02:29,918 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 [2022-02-10 03:02:29,918 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:29,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1112018535, now seen corresponding path program 80 times [2022-02-10 03:02:29,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:29,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590622628] [2022-02-10 03:02:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:29,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:29,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:29,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590622628] [2022-02-10 03:02:29,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590622628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:29,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514451373] [2022-02-10 03:02:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:29,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:29,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:29,997 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) [2022-02-10 03:02:29,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-10 03:02:30,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:30,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:30,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:30,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:30,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:30,104 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 43 treesize of output 35 [2022-02-10 03:02:30,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:30,106 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 35 treesize of output 27 [2022-02-10 03:02:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:30,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:30,243 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:30,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:30,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:30,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514451373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:30,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:30,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:30,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835793279] [2022-02-10 03:02:30,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:30,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:30,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:30,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:30,258 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) [2022-02-10 03:02:30,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:30,986 INFO L93 Difference]: Finished difference Result 274 states and 677 transitions. [2022-02-10 03:02:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:02:30,986 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 [2022-02-10 03:02:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:30,987 INFO L225 Difference]: With dead ends: 274 [2022-02-10 03:02:30,987 INFO L226 Difference]: Without dead ends: 269 [2022-02-10 03:02:30,987 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 [2022-02-10 03:02:30,987 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 [2022-02-10 03:02:30,987 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] [2022-02-10 03:02:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-10 03:02:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2022-02-10 03:02:30,990 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) [2022-02-10 03:02:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 590 transitions. [2022-02-10 03:02:30,991 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 590 transitions. Word has length 15 [2022-02-10 03:02:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:30,991 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 590 transitions. [2022-02-10 03:02:30,991 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) [2022-02-10 03:02:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 590 transitions. [2022-02-10 03:02:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:30,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:30,991 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:31,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-10 03:02:31,206 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 [2022-02-10 03:02:31,207 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:31,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash 606325171, now seen corresponding path program 81 times [2022-02-10 03:02:31,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:31,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581688030] [2022-02-10 03:02:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:31,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:31,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:31,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581688030] [2022-02-10 03:02:31,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581688030] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:31,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046415347] [2022-02-10 03:02:31,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:31,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:31,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:31,283 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) [2022-02-10 03:02:31,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-10 03:02:31,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:02:31,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:31,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:31,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:31,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:31,389 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 43 treesize of output 35 [2022-02-10 03:02:31,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:31,391 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 35 treesize of output 27 [2022-02-10 03:02:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:31,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:31,525 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:31,525 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 [2022-02-10 03:02:31,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:31,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046415347] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:31,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:31,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:31,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917879427] [2022-02-10 03:02:31,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:31,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:31,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:31,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:31,543 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) [2022-02-10 03:02:32,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:32,046 INFO L93 Difference]: Finished difference Result 258 states and 660 transitions. [2022-02-10 03:02:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:02:32,047 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 [2022-02-10 03:02:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:32,048 INFO L225 Difference]: With dead ends: 258 [2022-02-10 03:02:32,048 INFO L226 Difference]: Without dead ends: 258 [2022-02-10 03:02:32,048 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 [2022-02-10 03:02:32,048 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 [2022-02-10 03:02:32,048 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] [2022-02-10 03:02:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-10 03:02:32,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 195. [2022-02-10 03:02:32,051 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) [2022-02-10 03:02:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 552 transitions. [2022-02-10 03:02:32,051 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 552 transitions. Word has length 15 [2022-02-10 03:02:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:32,051 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 552 transitions. [2022-02-10 03:02:32,051 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) [2022-02-10 03:02:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 552 transitions. [2022-02-10 03:02:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:32,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:32,052 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:32,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:32,266 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 [2022-02-10 03:02:32,266 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:32,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1104288137, now seen corresponding path program 82 times [2022-02-10 03:02:32,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:32,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049822051] [2022-02-10 03:02:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:32,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:32,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:32,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049822051] [2022-02-10 03:02:32,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049822051] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:32,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904641860] [2022-02-10 03:02:32,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:32,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:32,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:32,344 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) [2022-02-10 03:02:32,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-10 03:02:32,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:32,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:32,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:32,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:32,488 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:02:32,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:32,491 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:02:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:32,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:32,597 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:32,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:32,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:32,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904641860] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:32,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:32,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:32,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903909755] [2022-02-10 03:02:32,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:32,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:32,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:32,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:32,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:32,612 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) [2022-02-10 03:02:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:32,860 INFO L93 Difference]: Finished difference Result 229 states and 614 transitions. [2022-02-10 03:02:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:02:32,861 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 [2022-02-10 03:02:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:32,861 INFO L225 Difference]: With dead ends: 229 [2022-02-10 03:02:32,861 INFO L226 Difference]: Without dead ends: 229 [2022-02-10 03:02:32,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:02:32,862 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 [2022-02-10 03:02:32,862 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] [2022-02-10 03:02:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-10 03:02:32,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 202. [2022-02-10 03:02:32,864 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) [2022-02-10 03:02:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 572 transitions. [2022-02-10 03:02:32,865 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 572 transitions. Word has length 15 [2022-02-10 03:02:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:32,865 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 572 transitions. [2022-02-10 03:02:32,865 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) [2022-02-10 03:02:32,865 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 572 transitions. [2022-02-10 03:02:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:32,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:32,865 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:32,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:33,075 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 [2022-02-10 03:02:33,075 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash 503233049, now seen corresponding path program 83 times [2022-02-10 03:02:33,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:33,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973991692] [2022-02-10 03:02:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:33,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:33,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:33,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973991692] [2022-02-10 03:02:33,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973991692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:33,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141086965] [2022-02-10 03:02:33,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:02:33,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:33,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:33,147 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) [2022-02-10 03:02:33,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-10 03:02:33,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:02:33,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:33,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:33,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:33,285 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 29 treesize of output 23 [2022-02-10 03:02:33,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:33,288 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 21 treesize of output 2 [2022-02-10 03:02:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:33,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:33,391 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:33,391 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:02:33,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:33,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141086965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:33,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:33,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:33,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777220424] [2022-02-10 03:02:33,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:33,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:33,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:33,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:33,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:33,406 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) [2022-02-10 03:02:33,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:33,674 INFO L93 Difference]: Finished difference Result 232 states and 622 transitions. [2022-02-10 03:02:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:02:33,674 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 [2022-02-10 03:02:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:33,675 INFO L225 Difference]: With dead ends: 232 [2022-02-10 03:02:33,675 INFO L226 Difference]: Without dead ends: 232 [2022-02-10 03:02:33,675 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 [2022-02-10 03:02:33,676 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 [2022-02-10 03:02:33,676 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] [2022-02-10 03:02:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-10 03:02:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 192. [2022-02-10 03:02:33,678 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) [2022-02-10 03:02:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 542 transitions. [2022-02-10 03:02:33,678 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 542 transitions. Word has length 15 [2022-02-10 03:02:33,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:33,678 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 542 transitions. [2022-02-10 03:02:33,679 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) [2022-02-10 03:02:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 542 transitions. [2022-02-10 03:02:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:33,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:33,679 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:33,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:33,883 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 [2022-02-10 03:02:33,883 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:33,884 INFO L85 PathProgramCache]: Analyzing trace with hash 202352403, now seen corresponding path program 84 times [2022-02-10 03:02:33,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:33,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372743240] [2022-02-10 03:02:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:33,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:34,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:34,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372743240] [2022-02-10 03:02:34,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372743240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:34,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59853621] [2022-02-10 03:02:34,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:02:34,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:34,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:34,084 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) [2022-02-10 03:02:34,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-10 03:02:34,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:02:34,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:34,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:34,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:34,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:34,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:34,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:34,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:34,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:34,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:34,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:34,326 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:34,326 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:02:34,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:34,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59853621] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:34,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:34,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:34,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61534125] [2022-02-10 03:02:34,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:34,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:34,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:34,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:34,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:34,342 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) [2022-02-10 03:02:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:34,524 INFO L93 Difference]: Finished difference Result 261 states and 661 transitions. [2022-02-10 03:02:34,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:02:34,525 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 [2022-02-10 03:02:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:34,526 INFO L225 Difference]: With dead ends: 261 [2022-02-10 03:02:34,526 INFO L226 Difference]: Without dead ends: 261 [2022-02-10 03:02:34,526 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 [2022-02-10 03:02:34,526 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:34,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 110 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-10 03:02:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 203. [2022-02-10 03:02:34,529 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) [2022-02-10 03:02:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 581 transitions. [2022-02-10 03:02:34,529 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 581 transitions. Word has length 15 [2022-02-10 03:02:34,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:34,529 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 581 transitions. [2022-02-10 03:02:34,529 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) [2022-02-10 03:02:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 581 transitions. [2022-02-10 03:02:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:34,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:34,530 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:34,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-10 03:02:34,734 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 [2022-02-10 03:02:34,734 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:34,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1756401527, now seen corresponding path program 85 times [2022-02-10 03:02:34,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:34,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971224060] [2022-02-10 03:02:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:34,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:34,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:34,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971224060] [2022-02-10 03:02:34,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971224060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:34,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800153785] [2022-02-10 03:02:34,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:02:34,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:34,811 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) [2022-02-10 03:02:34,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-10 03:02:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:34,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:34,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:34,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:34,953 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-10 03:02:34,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:34,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:34,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:35,053 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:35,053 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:02:35,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:35,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800153785] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:35,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:35,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:35,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568255955] [2022-02-10 03:02:35,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:35,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:35,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:35,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:35,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:35,073 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) [2022-02-10 03:02:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:35,329 INFO L93 Difference]: Finished difference Result 248 states and 635 transitions. [2022-02-10 03:02:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:02:35,330 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 [2022-02-10 03:02:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:35,331 INFO L225 Difference]: With dead ends: 248 [2022-02-10 03:02:35,331 INFO L226 Difference]: Without dead ends: 242 [2022-02-10 03:02:35,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:02:35,331 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:35,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 66 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-10 03:02:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 205. [2022-02-10 03:02:35,333 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) [2022-02-10 03:02:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 582 transitions. [2022-02-10 03:02:35,334 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 582 transitions. Word has length 15 [2022-02-10 03:02:35,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:35,334 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 582 transitions. [2022-02-10 03:02:35,334 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) [2022-02-10 03:02:35,334 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 582 transitions. [2022-02-10 03:02:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:35,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:35,334 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:35,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-02-10 03:02:35,535 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 [2022-02-10 03:02:35,535 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:35,535 INFO L85 PathProgramCache]: Analyzing trace with hash 441994741, now seen corresponding path program 86 times [2022-02-10 03:02:35,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:35,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617462514] [2022-02-10 03:02:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:35,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:35,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:35,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617462514] [2022-02-10 03:02:35,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617462514] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:35,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577519981] [2022-02-10 03:02:35,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:35,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:35,654 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) [2022-02-10 03:02:35,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-10 03:02:35,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:35,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:35,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:35,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:35,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:35,803 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 29 treesize of output 23 [2022-02-10 03:02:35,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:35,805 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 8 treesize of output 1 [2022-02-10 03:02:35,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:35,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:35,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:35,923 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:35,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:35,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:35,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577519981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:35,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:35,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:35,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017202647] [2022-02-10 03:02:35,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:35,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:35,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:35,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:35,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:35,940 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) [2022-02-10 03:02:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:36,496 INFO L93 Difference]: Finished difference Result 291 states and 719 transitions. [2022-02-10 03:02:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:02:36,497 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 [2022-02-10 03:02:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:36,498 INFO L225 Difference]: With dead ends: 291 [2022-02-10 03:02:36,498 INFO L226 Difference]: Without dead ends: 287 [2022-02-10 03:02:36,503 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 [2022-02-10 03:02:36,503 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:36,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 64 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:36,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-10 03:02:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 208. [2022-02-10 03:02:36,506 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) [2022-02-10 03:02:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 591 transitions. [2022-02-10 03:02:36,506 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 591 transitions. Word has length 15 [2022-02-10 03:02:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:36,507 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 591 transitions. [2022-02-10 03:02:36,507 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) [2022-02-10 03:02:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 591 transitions. [2022-02-10 03:02:36,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:36,507 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:36,507 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:36,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-10 03:02:36,723 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 [2022-02-10 03:02:36,723 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:36,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:36,723 INFO L85 PathProgramCache]: Analyzing trace with hash -477705967, now seen corresponding path program 87 times [2022-02-10 03:02:36,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:36,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937028524] [2022-02-10 03:02:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:36,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:36,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:36,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937028524] [2022-02-10 03:02:36,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937028524] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:36,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952462879] [2022-02-10 03:02:36,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:36,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:36,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:36,830 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) [2022-02-10 03:02:36,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-10 03:02:36,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:02:36,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:36,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:36,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:36,986 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-10 03:02:36,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:36,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:37,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:37,091 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:37,091 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:02:37,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:37,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952462879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:37,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:37,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:37,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20243627] [2022-02-10 03:02:37,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:37,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:37,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:37,110 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) [2022-02-10 03:02:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:37,473 INFO L93 Difference]: Finished difference Result 249 states and 642 transitions. [2022-02-10 03:02:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:02:37,473 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 [2022-02-10 03:02:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:37,474 INFO L225 Difference]: With dead ends: 249 [2022-02-10 03:02:37,474 INFO L226 Difference]: Without dead ends: 243 [2022-02-10 03:02:37,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:02:37,474 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 [2022-02-10 03:02:37,475 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] [2022-02-10 03:02:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-10 03:02:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 209. [2022-02-10 03:02:37,477 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) [2022-02-10 03:02:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 591 transitions. [2022-02-10 03:02:37,477 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 591 transitions. Word has length 15 [2022-02-10 03:02:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:37,478 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 591 transitions. [2022-02-10 03:02:37,478 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) [2022-02-10 03:02:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 591 transitions. [2022-02-10 03:02:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:37,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:37,478 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:37,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-02-10 03:02:37,678 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 [2022-02-10 03:02:37,679 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:37,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:37,679 INFO L85 PathProgramCache]: Analyzing trace with hash 449725139, now seen corresponding path program 88 times [2022-02-10 03:02:37,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:37,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958385932] [2022-02-10 03:02:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:37,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:37,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:37,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958385932] [2022-02-10 03:02:37,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958385932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:37,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762489520] [2022-02-10 03:02:37,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:37,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:37,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:37,754 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) [2022-02-10 03:02:37,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-10 03:02:37,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:37,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:37,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:37,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:37,869 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 43 treesize of output 35 [2022-02-10 03:02:37,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:37,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:37,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:38,030 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:38,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:38,031 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 [2022-02-10 03:02:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:38,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762489520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:38,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:38,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:38,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384137142] [2022-02-10 03:02:38,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:38,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:38,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:38,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:38,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:38,045 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) [2022-02-10 03:02:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:38,566 INFO L93 Difference]: Finished difference Result 303 states and 708 transitions. [2022-02-10 03:02:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:02:38,567 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 [2022-02-10 03:02:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:38,567 INFO L225 Difference]: With dead ends: 303 [2022-02-10 03:02:38,567 INFO L226 Difference]: Without dead ends: 302 [2022-02-10 03:02:38,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:02:38,568 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 137 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:02:38,568 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] [2022-02-10 03:02:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-10 03:02:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 208. [2022-02-10 03:02:38,570 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) [2022-02-10 03:02:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 584 transitions. [2022-02-10 03:02:38,570 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 584 transitions. Word has length 15 [2022-02-10 03:02:38,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:38,571 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 584 transitions. [2022-02-10 03:02:38,571 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) [2022-02-10 03:02:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 584 transitions. [2022-02-10 03:02:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:38,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:38,571 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:38,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-10 03:02:38,774 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 [2022-02-10 03:02:38,774 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1251341367, now seen corresponding path program 89 times [2022-02-10 03:02:38,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:38,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071317013] [2022-02-10 03:02:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:38,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:38,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:38,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071317013] [2022-02-10 03:02:38,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071317013] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:38,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445759291] [2022-02-10 03:02:38,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:02:38,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:38,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:38,849 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) [2022-02-10 03:02:38,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-10 03:02:38,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:02:38,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:38,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:38,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:38,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:38,965 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:02:38,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:38,966 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 35 treesize of output 27 [2022-02-10 03:02:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:39,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:39,102 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:39,102 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:02:39,104 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 21 treesize of output 13 [2022-02-10 03:02:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:39,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445759291] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:39,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:39,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:39,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479976736] [2022-02-10 03:02:39,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:39,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:39,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:39,125 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) [2022-02-10 03:02:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:39,487 INFO L93 Difference]: Finished difference Result 264 states and 656 transitions. [2022-02-10 03:02:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:02:39,487 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 [2022-02-10 03:02:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:39,488 INFO L225 Difference]: With dead ends: 264 [2022-02-10 03:02:39,488 INFO L226 Difference]: Without dead ends: 260 [2022-02-10 03:02:39,488 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 [2022-02-10 03:02:39,488 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:39,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 68 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:02:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-10 03:02:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 210. [2022-02-10 03:02:39,490 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) [2022-02-10 03:02:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 588 transitions. [2022-02-10 03:02:39,491 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 588 transitions. Word has length 15 [2022-02-10 03:02:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:39,491 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 588 transitions. [2022-02-10 03:02:39,491 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) [2022-02-10 03:02:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 588 transitions. [2022-02-10 03:02:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:39,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:39,491 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:39,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:39,695 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 [2022-02-10 03:02:39,695 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1325282223, now seen corresponding path program 90 times [2022-02-10 03:02:39,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:39,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485649098] [2022-02-10 03:02:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:39,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:39,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:39,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485649098] [2022-02-10 03:02:39,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485649098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:39,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007572810] [2022-02-10 03:02:39,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:02:39,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:39,771 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) [2022-02-10 03:02:39,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-10 03:02:39,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:02:39,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:39,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:39,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:39,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:39,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:39,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:39,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:39,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:40,026 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:40,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:40,028 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 [2022-02-10 03:02:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:40,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007572810] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:40,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:40,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:40,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195053022] [2022-02-10 03:02:40,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:40,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:40,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:40,046 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) [2022-02-10 03:02:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:40,323 INFO L93 Difference]: Finished difference Result 254 states and 647 transitions. [2022-02-10 03:02:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:02:40,323 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 [2022-02-10 03:02:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:40,324 INFO L225 Difference]: With dead ends: 254 [2022-02-10 03:02:40,324 INFO L226 Difference]: Without dead ends: 254 [2022-02-10 03:02:40,324 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 [2022-02-10 03:02:40,324 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:40,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 80 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:02:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-10 03:02:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 207. [2022-02-10 03:02:40,326 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) [2022-02-10 03:02:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 577 transitions. [2022-02-10 03:02:40,327 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 577 transitions. Word has length 15 [2022-02-10 03:02:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:40,327 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 577 transitions. [2022-02-10 03:02:40,327 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) [2022-02-10 03:02:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 577 transitions. [2022-02-10 03:02:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:40,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:40,327 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:40,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-10 03:02:40,528 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 [2022-02-10 03:02:40,528 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:40,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:40,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1164635591, now seen corresponding path program 91 times [2022-02-10 03:02:40,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:40,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133897822] [2022-02-10 03:02:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:40,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:02:40,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:40,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133897822] [2022-02-10 03:02:40,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133897822] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:40,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534153703] [2022-02-10 03:02:40,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:02:40,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:40,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:40,602 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) [2022-02-10 03:02:40,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-10 03:02:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:40,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:40,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:40,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:40,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:40,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:40,707 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 [2022-02-10 03:02:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:40,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:40,834 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:40,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:40,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:02:40,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534153703] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:40,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:40,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:02:40,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877527957] [2022-02-10 03:02:40,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:40,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:40,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:40,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:40,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:40,852 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) [2022-02-10 03:02:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:41,144 INFO L93 Difference]: Finished difference Result 229 states and 619 transitions. [2022-02-10 03:02:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:02:41,144 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 [2022-02-10 03:02:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:41,145 INFO L225 Difference]: With dead ends: 229 [2022-02-10 03:02:41,145 INFO L226 Difference]: Without dead ends: 227 [2022-02-10 03:02:41,145 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 [2022-02-10 03:02:41,145 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 [2022-02-10 03:02:41,145 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] [2022-02-10 03:02:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-10 03:02:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 207. [2022-02-10 03:02:41,148 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) [2022-02-10 03:02:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 575 transitions. [2022-02-10 03:02:41,148 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 575 transitions. Word has length 15 [2022-02-10 03:02:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:41,148 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 575 transitions. [2022-02-10 03:02:41,148 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) [2022-02-10 03:02:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 575 transitions. [2022-02-10 03:02:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:41,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:41,148 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:41,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-02-10 03:02:41,351 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 [2022-02-10 03:02:41,351 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:41,351 INFO L85 PathProgramCache]: Analyzing trace with hash 33405523, now seen corresponding path program 92 times [2022-02-10 03:02:41,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:41,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399909731] [2022-02-10 03:02:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:41,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:41,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:41,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399909731] [2022-02-10 03:02:41,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399909731] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:41,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773664638] [2022-02-10 03:02:41,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:41,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:41,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:41,425 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) [2022-02-10 03:02:41,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-10 03:02:41,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:41,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:41,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:41,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:41,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:41,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:41,539 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 35 treesize of output 27 [2022-02-10 03:02:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:41,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:41,678 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:41,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:41,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:41,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773664638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:41,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:41,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:02:41,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058907444] [2022-02-10 03:02:41,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:41,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:41,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:41,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:41,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:41,703 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) [2022-02-10 03:02:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:41,911 INFO L93 Difference]: Finished difference Result 288 states and 707 transitions. [2022-02-10 03:02:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:02:41,911 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 [2022-02-10 03:02:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:41,912 INFO L225 Difference]: With dead ends: 288 [2022-02-10 03:02:41,912 INFO L226 Difference]: Without dead ends: 288 [2022-02-10 03:02:41,912 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 [2022-02-10 03:02:41,912 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 [2022-02-10 03:02:41,912 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] [2022-02-10 03:02:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-10 03:02:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 219. [2022-02-10 03:02:41,915 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) [2022-02-10 03:02:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 618 transitions. [2022-02-10 03:02:41,915 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 618 transitions. Word has length 15 [2022-02-10 03:02:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:41,915 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 618 transitions. [2022-02-10 03:02:41,915 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) [2022-02-10 03:02:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 618 transitions. [2022-02-10 03:02:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:41,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:41,916 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:41,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:42,116 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 [2022-02-10 03:02:42,116 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash 835021751, now seen corresponding path program 93 times [2022-02-10 03:02:42,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:42,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680119475] [2022-02-10 03:02:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:42,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:42,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:42,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680119475] [2022-02-10 03:02:42,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680119475] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:42,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55621944] [2022-02-10 03:02:42,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:42,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:42,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:42,182 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) [2022-02-10 03:02:42,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-10 03:02:42,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:02:42,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:42,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:42,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:42,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:42,281 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:02:42,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:42,283 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 35 treesize of output 27 [2022-02-10 03:02:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:42,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:42,412 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:42,412 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:02:42,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:42,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55621944] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:42,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:42,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 16 [2022-02-10 03:02:42,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935633677] [2022-02-10 03:02:42,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:42,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:42,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:42,430 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) [2022-02-10 03:02:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:42,791 INFO L93 Difference]: Finished difference Result 326 states and 769 transitions. [2022-02-10 03:02:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:02:42,791 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 [2022-02-10 03:02:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:42,792 INFO L225 Difference]: With dead ends: 326 [2022-02-10 03:02:42,792 INFO L226 Difference]: Without dead ends: 322 [2022-02-10 03:02:42,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:02:42,792 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:42,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 70 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-10 03:02:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 226. [2022-02-10 03:02:42,798 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) [2022-02-10 03:02:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 641 transitions. [2022-02-10 03:02:42,799 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 641 transitions. Word has length 15 [2022-02-10 03:02:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:42,799 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 641 transitions. [2022-02-10 03:02:42,799 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) [2022-02-10 03:02:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 641 transitions. [2022-02-10 03:02:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:42,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:42,799 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:42,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-02-10 03:02:43,002 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 [2022-02-10 03:02:43,002 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1741601839, now seen corresponding path program 94 times [2022-02-10 03:02:43,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:43,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588711150] [2022-02-10 03:02:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:43,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:43,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:43,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588711150] [2022-02-10 03:02:43,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588711150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:43,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083214144] [2022-02-10 03:02:43,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:43,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:43,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:43,065 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) [2022-02-10 03:02:43,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-10 03:02:43,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:43,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:43,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:43,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:43,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:43,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:43,172 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 35 treesize of output 27 [2022-02-10 03:02:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:43,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:43,295 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:43,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:43,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:43,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083214144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:43,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:43,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:02:43,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489310607] [2022-02-10 03:02:43,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:43,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:43,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:43,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:43,314 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) [2022-02-10 03:02:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:43,565 INFO L93 Difference]: Finished difference Result 292 states and 729 transitions. [2022-02-10 03:02:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:02:43,565 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 [2022-02-10 03:02:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:43,566 INFO L225 Difference]: With dead ends: 292 [2022-02-10 03:02:43,566 INFO L226 Difference]: Without dead ends: 292 [2022-02-10 03:02:43,566 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 [2022-02-10 03:02:43,566 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:43,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 84 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-10 03:02:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 220. [2022-02-10 03:02:43,569 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) [2022-02-10 03:02:43,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 618 transitions. [2022-02-10 03:02:43,569 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 618 transitions. Word has length 15 [2022-02-10 03:02:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:43,569 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 618 transitions. [2022-02-10 03:02:43,569 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) [2022-02-10 03:02:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 618 transitions. [2022-02-10 03:02:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:43,570 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:43,570 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:43,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-02-10 03:02:43,770 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 [2022-02-10 03:02:43,770 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:43,771 INFO L85 PathProgramCache]: Analyzing trace with hash 842752149, now seen corresponding path program 95 times [2022-02-10 03:02:43,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:43,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163411211] [2022-02-10 03:02:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:43,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:43,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:43,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163411211] [2022-02-10 03:02:43,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163411211] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:43,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103237275] [2022-02-10 03:02:43,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:02:43,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:43,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:43,835 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) [2022-02-10 03:02:43,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-10 03:02:43,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:02:43,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:43,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:43,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:43,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:43,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:43,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:43,957 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:02:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:43,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:44,044 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:02:44,044 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 28 treesize of output 23 [2022-02-10 03:02:44,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:44,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103237275] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:44,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:44,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:02:44,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700366995] [2022-02-10 03:02:44,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:44,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:02:44,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:02:44,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:02:44,062 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) [2022-02-10 03:02:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:44,239 INFO L93 Difference]: Finished difference Result 277 states and 702 transitions. [2022-02-10 03:02:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:02:44,239 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 [2022-02-10 03:02:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:44,240 INFO L225 Difference]: With dead ends: 277 [2022-02-10 03:02:44,240 INFO L226 Difference]: Without dead ends: 277 [2022-02-10 03:02:44,240 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 [2022-02-10 03:02:44,241 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 [2022-02-10 03:02:44,241 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] [2022-02-10 03:02:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-02-10 03:02:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 219. [2022-02-10 03:02:44,243 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) [2022-02-10 03:02:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 614 transitions. [2022-02-10 03:02:44,244 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 614 transitions. Word has length 15 [2022-02-10 03:02:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:44,244 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 614 transitions. [2022-02-10 03:02:44,244 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) [2022-02-10 03:02:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 614 transitions. [2022-02-10 03:02:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:44,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:44,244 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:44,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:44,445 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 [2022-02-10 03:02:44,445 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 12399315, now seen corresponding path program 96 times [2022-02-10 03:02:44,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:44,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590938886] [2022-02-10 03:02:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:44,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:44,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:44,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590938886] [2022-02-10 03:02:44,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590938886] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:44,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603290198] [2022-02-10 03:02:44,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:02:44,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:44,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:44,524 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) [2022-02-10 03:02:44,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-10 03:02:44,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:02:44,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:44,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:44,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:44,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:44,640 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 43 treesize of output 35 [2022-02-10 03:02:44,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:44,642 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 35 treesize of output 27 [2022-02-10 03:02:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:44,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:44,799 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:44,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:44,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:44,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603290198] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:44,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:44,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:44,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570896181] [2022-02-10 03:02:44,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:44,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:44,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:44,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:44,819 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) [2022-02-10 03:02:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:45,041 INFO L93 Difference]: Finished difference Result 304 states and 751 transitions. [2022-02-10 03:02:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:02:45,041 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 [2022-02-10 03:02:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:45,042 INFO L225 Difference]: With dead ends: 304 [2022-02-10 03:02:45,042 INFO L226 Difference]: Without dead ends: 304 [2022-02-10 03:02:45,042 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 [2022-02-10 03:02:45,042 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 [2022-02-10 03:02:45,042 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] [2022-02-10 03:02:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-10 03:02:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 230. [2022-02-10 03:02:45,045 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) [2022-02-10 03:02:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 654 transitions. [2022-02-10 03:02:45,045 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 654 transitions. Word has length 15 [2022-02-10 03:02:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:45,045 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 654 transitions. [2022-02-10 03:02:45,045 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) [2022-02-10 03:02:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 654 transitions. [2022-02-10 03:02:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:45,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:45,046 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:45,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-02-10 03:02:45,251 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 [2022-02-10 03:02:45,251 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash 814015543, now seen corresponding path program 97 times [2022-02-10 03:02:45,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:45,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265820200] [2022-02-10 03:02:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:45,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:45,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:45,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265820200] [2022-02-10 03:02:45,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265820200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:45,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37766013] [2022-02-10 03:02:45,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:02:45,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:45,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:45,332 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) [2022-02-10 03:02:45,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-10 03:02:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:45,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:45,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:45,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:45,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:45,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:45,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:45,597 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:45,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:45,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:45,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37766013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:45,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:45,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:45,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155995916] [2022-02-10 03:02:45,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:45,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:45,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:45,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:45,612 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) [2022-02-10 03:02:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:46,253 INFO L93 Difference]: Finished difference Result 322 states and 787 transitions. [2022-02-10 03:02:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:02:46,254 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 [2022-02-10 03:02:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:46,254 INFO L225 Difference]: With dead ends: 322 [2022-02-10 03:02:46,254 INFO L226 Difference]: Without dead ends: 316 [2022-02-10 03:02:46,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:02:46,255 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:46,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 70 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:02:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-10 03:02:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 243. [2022-02-10 03:02:46,257 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) [2022-02-10 03:02:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 695 transitions. [2022-02-10 03:02:46,258 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 695 transitions. Word has length 15 [2022-02-10 03:02:46,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:46,258 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 695 transitions. [2022-02-10 03:02:46,258 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) [2022-02-10 03:02:46,258 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 695 transitions. [2022-02-10 03:02:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:46,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:46,258 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:46,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-02-10 03:02:46,459 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 [2022-02-10 03:02:46,459 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:46,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1762608047, now seen corresponding path program 98 times [2022-02-10 03:02:46,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:46,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303341946] [2022-02-10 03:02:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:46,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:46,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:46,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303341946] [2022-02-10 03:02:46,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303341946] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:46,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894011252] [2022-02-10 03:02:46,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:46,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:46,534 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) [2022-02-10 03:02:46,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-10 03:02:46,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:46,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:46,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:46,650 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 43 treesize of output 35 [2022-02-10 03:02:46,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:46,652 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 35 treesize of output 27 [2022-02-10 03:02:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:46,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:46,791 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:46,791 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 30 treesize of output 27 [2022-02-10 03:02:46,793 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 13 treesize of output 9 [2022-02-10 03:02:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:46,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894011252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:46,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:46,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-10 03:02:46,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831624902] [2022-02-10 03:02:46,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:46,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:02:46,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:46,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:02:46,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:02:46,807 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) [2022-02-10 03:02:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:47,314 INFO L93 Difference]: Finished difference Result 312 states and 775 transitions. [2022-02-10 03:02:47,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:02:47,315 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 [2022-02-10 03:02:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:47,315 INFO L225 Difference]: With dead ends: 312 [2022-02-10 03:02:47,315 INFO L226 Difference]: Without dead ends: 311 [2022-02-10 03:02:47,315 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 [2022-02-10 03:02:47,315 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 [2022-02-10 03:02:47,315 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] [2022-02-10 03:02:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-10 03:02:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 225. [2022-02-10 03:02:47,318 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) [2022-02-10 03:02:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 628 transitions. [2022-02-10 03:02:47,318 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 628 transitions. Word has length 15 [2022-02-10 03:02:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:47,318 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 628 transitions. [2022-02-10 03:02:47,318 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) [2022-02-10 03:02:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 628 transitions. [2022-02-10 03:02:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:47,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:47,319 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:47,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:47,519 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 [2022-02-10 03:02:47,519 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash 821745941, now seen corresponding path program 99 times [2022-02-10 03:02:47,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:47,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339052459] [2022-02-10 03:02:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:47,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:47,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:47,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339052459] [2022-02-10 03:02:47,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339052459] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:47,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884070172] [2022-02-10 03:02:47,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:47,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:47,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:47,596 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) [2022-02-10 03:02:47,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-10 03:02:47,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:02:47,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:47,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:47,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:47,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:47,779 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 [2022-02-10 03:02:47,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:47,781 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 [2022-02-10 03:02:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:47,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:47,886 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:47,886 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:02:47,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:47,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884070172] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:47,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:47,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:47,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234068102] [2022-02-10 03:02:47,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:47,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:47,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:47,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:47,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:47,902 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) [2022-02-10 03:02:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:48,386 INFO L93 Difference]: Finished difference Result 271 states and 702 transitions. [2022-02-10 03:02:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:02:48,386 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 [2022-02-10 03:02:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:48,387 INFO L225 Difference]: With dead ends: 271 [2022-02-10 03:02:48,387 INFO L226 Difference]: Without dead ends: 271 [2022-02-10 03:02:48,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:02:48,387 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:48,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 76 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 360 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-02-10 03:02:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-02-10 03:02:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 234. [2022-02-10 03:02:48,390 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) [2022-02-10 03:02:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 654 transitions. [2022-02-10 03:02:48,390 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 654 transitions. Word has length 15 [2022-02-10 03:02:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:48,390 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 654 transitions. [2022-02-10 03:02:48,390 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) [2022-02-10 03:02:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 654 transitions. [2022-02-10 03:02:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:48,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:48,391 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:48,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:48,591 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 [2022-02-10 03:02:48,591 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash 710923421, now seen corresponding path program 100 times [2022-02-10 03:02:48,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:48,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322923457] [2022-02-10 03:02:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:48,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:48,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:48,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322923457] [2022-02-10 03:02:48,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322923457] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:48,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221229149] [2022-02-10 03:02:48,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:48,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:48,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:48,669 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) [2022-02-10 03:02:48,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-10 03:02:48,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:48,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:48,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:48,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:48,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:48,805 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 29 treesize of output 23 [2022-02-10 03:02:48,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:48,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:48,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:48,922 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:48,922 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 30 treesize of output 27 [2022-02-10 03:02:48,924 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 13 treesize of output 9 [2022-02-10 03:02:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:48,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221229149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:48,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:48,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:48,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734902909] [2022-02-10 03:02:48,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:48,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:48,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:48,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:48,937 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) [2022-02-10 03:02:49,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:49,516 INFO L93 Difference]: Finished difference Result 279 states and 714 transitions. [2022-02-10 03:02:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:02:49,520 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 [2022-02-10 03:02:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:49,520 INFO L225 Difference]: With dead ends: 279 [2022-02-10 03:02:49,520 INFO L226 Difference]: Without dead ends: 279 [2022-02-10 03:02:49,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:02:49,521 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 [2022-02-10 03:02:49,521 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] [2022-02-10 03:02:49,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-10 03:02:49,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 232. [2022-02-10 03:02:49,524 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) [2022-02-10 03:02:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 648 transitions. [2022-02-10 03:02:49,524 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 648 transitions. Word has length 15 [2022-02-10 03:02:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:49,524 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 648 transitions. [2022-02-10 03:02:49,524 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) [2022-02-10 03:02:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 648 transitions. [2022-02-10 03:02:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:49,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:49,525 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:49,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-10 03:02:49,725 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 [2022-02-10 03:02:49,725 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:49,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1865700169, now seen corresponding path program 101 times [2022-02-10 03:02:49,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:49,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111801702] [2022-02-10 03:02:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:49,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:49,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:49,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111801702] [2022-02-10 03:02:49,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111801702] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:49,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346708633] [2022-02-10 03:02:49,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:02:49,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:49,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:49,796 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) [2022-02-10 03:02:49,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-10 03:02:49,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:02:49,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:49,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:49,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:49,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:49,947 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:02:49,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:49,949 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 21 treesize of output 2 [2022-02-10 03:02:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:49,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:50,059 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:50,060 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 30 treesize of output 27 [2022-02-10 03:02:50,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:50,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346708633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:50,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:50,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:50,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010399875] [2022-02-10 03:02:50,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:50,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:50,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:50,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:50,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:50,075 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) [2022-02-10 03:02:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:50,521 INFO L93 Difference]: Finished difference Result 266 states and 696 transitions. [2022-02-10 03:02:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:02:50,521 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 [2022-02-10 03:02:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:50,521 INFO L225 Difference]: With dead ends: 266 [2022-02-10 03:02:50,522 INFO L226 Difference]: Without dead ends: 266 [2022-02-10 03:02:50,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:02:50,522 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 [2022-02-10 03:02:50,522 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] [2022-02-10 03:02:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-10 03:02:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 222. [2022-02-10 03:02:50,524 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) [2022-02-10 03:02:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 618 transitions. [2022-02-10 03:02:50,525 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 618 transitions. Word has length 15 [2022-02-10 03:02:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:50,525 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 618 transitions. [2022-02-10 03:02:50,525 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) [2022-02-10 03:02:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 618 transitions. [2022-02-10 03:02:50,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:50,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:50,525 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:50,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:50,725 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 [2022-02-10 03:02:50,726 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash -667659055, now seen corresponding path program 102 times [2022-02-10 03:02:50,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:50,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120736405] [2022-02-10 03:02:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:50,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:50,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:50,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120736405] [2022-02-10 03:02:50,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120736405] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:50,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069585277] [2022-02-10 03:02:50,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:02:50,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:50,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:50,802 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) [2022-02-10 03:02:50,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-10 03:02:50,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:02:50,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:50,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:50,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:50,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:50,951 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 21 treesize of output 2 [2022-02-10 03:02:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:50,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:51,055 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:51,055 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 30 treesize of output 27 [2022-02-10 03:02:51,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:51,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069585277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:51,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:51,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:51,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142801390] [2022-02-10 03:02:51,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:51,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:51,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:51,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:51,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:51,072 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) [2022-02-10 03:02:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:51,222 INFO L93 Difference]: Finished difference Result 258 states and 686 transitions. [2022-02-10 03:02:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:02:51,223 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 [2022-02-10 03:02:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:51,223 INFO L225 Difference]: With dead ends: 258 [2022-02-10 03:02:51,223 INFO L226 Difference]: Without dead ends: 258 [2022-02-10 03:02:51,224 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 [2022-02-10 03:02:51,224 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 [2022-02-10 03:02:51,224 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] [2022-02-10 03:02:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-10 03:02:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 226. [2022-02-10 03:02:51,226 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) [2022-02-10 03:02:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 630 transitions. [2022-02-10 03:02:51,227 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 630 transitions. Word has length 15 [2022-02-10 03:02:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:51,227 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 630 transitions. [2022-02-10 03:02:51,227 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) [2022-02-10 03:02:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 630 transitions. [2022-02-10 03:02:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:51,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:51,227 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:51,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:51,435 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 [2022-02-10 03:02:51,435 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1626057831, now seen corresponding path program 103 times [2022-02-10 03:02:51,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:51,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119644028] [2022-02-10 03:02:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:51,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:51,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:51,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119644028] [2022-02-10 03:02:51,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119644028] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:51,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153918943] [2022-02-10 03:02:51,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:02:51,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:51,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:51,503 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) [2022-02-10 03:02:51,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-10 03:02:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:51,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:51,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:51,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:51,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:51,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:51,648 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 21 treesize of output 2 [2022-02-10 03:02:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:51,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:51,752 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:02:51,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:51,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:51,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153918943] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:51,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:51,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:51,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856179304] [2022-02-10 03:02:51,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:51,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:51,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:51,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:51,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:51,767 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) [2022-02-10 03:02:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:51,900 INFO L93 Difference]: Finished difference Result 254 states and 674 transitions. [2022-02-10 03:02:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:02:51,901 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 [2022-02-10 03:02:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:51,901 INFO L225 Difference]: With dead ends: 254 [2022-02-10 03:02:51,901 INFO L226 Difference]: Without dead ends: 254 [2022-02-10 03:02:51,901 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 [2022-02-10 03:02:51,901 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 [2022-02-10 03:02:51,902 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] [2022-02-10 03:02:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-10 03:02:51,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 225. [2022-02-10 03:02:51,904 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) [2022-02-10 03:02:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 627 transitions. [2022-02-10 03:02:51,904 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 627 transitions. Word has length 15 [2022-02-10 03:02:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:51,904 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 627 transitions. [2022-02-10 03:02:51,904 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) [2022-02-10 03:02:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 627 transitions. [2022-02-10 03:02:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:51,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:51,905 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:51,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-10 03:02:52,105 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 [2022-02-10 03:02:52,106 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1814621851, now seen corresponding path program 104 times [2022-02-10 03:02:52,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:52,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733377858] [2022-02-10 03:02:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:52,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:52,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:52,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733377858] [2022-02-10 03:02:52,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733377858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:52,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655266184] [2022-02-10 03:02:52,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:52,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:52,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:52,177 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) [2022-02-10 03:02:52,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-10 03:02:52,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:52,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:52,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:52,288 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 29 treesize of output 23 [2022-02-10 03:02:52,290 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 8 treesize of output 1 [2022-02-10 03:02:52,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:52,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:52,386 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:52,386 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:02:52,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:52,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655266184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:52,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:52,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 03:02:52,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701709464] [2022-02-10 03:02:52,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:52,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:02:52,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:52,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:02:52,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:02:52,397 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) [2022-02-10 03:02:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:52,580 INFO L93 Difference]: Finished difference Result 291 states and 782 transitions. [2022-02-10 03:02:52,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-10 03:02:52,580 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 [2022-02-10 03:02:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:52,581 INFO L225 Difference]: With dead ends: 291 [2022-02-10 03:02:52,581 INFO L226 Difference]: Without dead ends: 291 [2022-02-10 03:02:52,581 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 [2022-02-10 03:02:52,581 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 [2022-02-10 03:02:52,581 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] [2022-02-10 03:02:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-10 03:02:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 224. [2022-02-10 03:02:52,584 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) [2022-02-10 03:02:52,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 626 transitions. [2022-02-10 03:02:52,584 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 626 transitions. Word has length 15 [2022-02-10 03:02:52,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:52,584 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 626 transitions. [2022-02-10 03:02:52,584 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) [2022-02-10 03:02:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 626 transitions. [2022-02-10 03:02:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:52,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:52,585 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:52,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-02-10 03:02:52,785 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 [2022-02-10 03:02:52,786 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:52,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1256099443, now seen corresponding path program 105 times [2022-02-10 03:02:52,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:52,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325099528] [2022-02-10 03:02:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:52,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:52,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:52,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325099528] [2022-02-10 03:02:52,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325099528] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:52,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950790977] [2022-02-10 03:02:52,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:52,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:52,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:52,856 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) [2022-02-10 03:02:52,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-10 03:02:52,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:02:52,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:52,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:52,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:52,982 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 37 treesize of output 31 [2022-02-10 03:02:52,984 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-10 03:02:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:53,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:53,079 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:53,080 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-10 03:02:53,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:53,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950790977] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:53,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:53,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 03:02:53,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217211665] [2022-02-10 03:02:53,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:53,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:02:53,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:02:53,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:02:53,115 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) [2022-02-10 03:02:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:53,338 INFO L93 Difference]: Finished difference Result 288 states and 772 transitions. [2022-02-10 03:02:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:02:53,339 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 [2022-02-10 03:02:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:53,339 INFO L225 Difference]: With dead ends: 288 [2022-02-10 03:02:53,339 INFO L226 Difference]: Without dead ends: 284 [2022-02-10 03:02:53,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:02:53,339 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 [2022-02-10 03:02:53,340 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] [2022-02-10 03:02:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-10 03:02:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 224. [2022-02-10 03:02:53,342 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) [2022-02-10 03:02:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 625 transitions. [2022-02-10 03:02:53,342 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 625 transitions. Word has length 15 [2022-02-10 03:02:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:53,343 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 625 transitions. [2022-02-10 03:02:53,343 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) [2022-02-10 03:02:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 625 transitions. [2022-02-10 03:02:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:53,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:53,343 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:53,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:53,557 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 [2022-02-10 03:02:53,557 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:53,558 INFO L85 PathProgramCache]: Analyzing trace with hash 237280121, now seen corresponding path program 106 times [2022-02-10 03:02:53,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:53,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019788354] [2022-02-10 03:02:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:53,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:53,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:53,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019788354] [2022-02-10 03:02:53,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019788354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:53,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857370761] [2022-02-10 03:02:53,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:53,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:53,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:53,627 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) [2022-02-10 03:02:53,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-10 03:02:53,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:53,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:53,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:53,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:53,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:53,771 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:02:53,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:53,774 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 21 treesize of output 2 [2022-02-10 03:02:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:53,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:53,885 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:53,885 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 24 treesize of output 21 [2022-02-10 03:02:53,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:53,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857370761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:53,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:53,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:53,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605395319] [2022-02-10 03:02:53,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:53,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:53,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:53,896 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) [2022-02-10 03:02:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:54,110 INFO L93 Difference]: Finished difference Result 305 states and 809 transitions. [2022-02-10 03:02:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:02:54,111 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 [2022-02-10 03:02:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:54,111 INFO L225 Difference]: With dead ends: 305 [2022-02-10 03:02:54,111 INFO L226 Difference]: Without dead ends: 305 [2022-02-10 03:02:54,111 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 [2022-02-10 03:02:54,112 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 [2022-02-10 03:02:54,112 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] [2022-02-10 03:02:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-10 03:02:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 227. [2022-02-10 03:02:54,114 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) [2022-02-10 03:02:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 634 transitions. [2022-02-10 03:02:54,115 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 634 transitions. Word has length 15 [2022-02-10 03:02:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:54,115 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 634 transitions. [2022-02-10 03:02:54,115 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) [2022-02-10 03:02:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 634 transitions. [2022-02-10 03:02:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:54,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:54,115 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:54,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-10 03:02:54,315 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 [2022-02-10 03:02:54,316 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1791329245, now seen corresponding path program 107 times [2022-02-10 03:02:54,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:54,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066892319] [2022-02-10 03:02:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:54,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:54,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:54,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066892319] [2022-02-10 03:02:54,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066892319] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:54,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920937114] [2022-02-10 03:02:54,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:02:54,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:54,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:54,423 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) [2022-02-10 03:02:54,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-10 03:02:54,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:02:54,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:54,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:54,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:54,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:54,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:54,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:54,589 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 31 treesize of output 25 [2022-02-10 03:02:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:54,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:54,711 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:54,711 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 38 treesize of output 31 [2022-02-10 03:02:54,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:54,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920937114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:54,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:54,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:02:54,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831732580] [2022-02-10 03:02:54,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:54,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:02:54,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:54,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:02:54,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:02:54,727 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) [2022-02-10 03:02:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:54,983 INFO L93 Difference]: Finished difference Result 291 states and 778 transitions. [2022-02-10 03:02:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:02:54,983 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 [2022-02-10 03:02:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:54,984 INFO L225 Difference]: With dead ends: 291 [2022-02-10 03:02:54,984 INFO L226 Difference]: Without dead ends: 288 [2022-02-10 03:02:54,984 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 [2022-02-10 03:02:54,984 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 [2022-02-10 03:02:54,984 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] [2022-02-10 03:02:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-10 03:02:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 227. [2022-02-10 03:02:55,001 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) [2022-02-10 03:02:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 633 transitions. [2022-02-10 03:02:55,002 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 633 transitions. Word has length 15 [2022-02-10 03:02:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:55,002 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 633 transitions. [2022-02-10 03:02:55,002 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) [2022-02-10 03:02:55,002 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 633 transitions. [2022-02-10 03:02:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:55,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:55,003 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:55,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:55,203 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 [2022-02-10 03:02:55,203 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:55,203 INFO L85 PathProgramCache]: Analyzing trace with hash 476922459, now seen corresponding path program 108 times [2022-02-10 03:02:55,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:55,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889933433] [2022-02-10 03:02:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:55,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:55,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:55,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889933433] [2022-02-10 03:02:55,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889933433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:55,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911462290] [2022-02-10 03:02:55,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:02:55,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:55,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:55,281 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) [2022-02-10 03:02:55,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-10 03:02:55,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:02:55,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:55,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:55,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:55,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:55,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:55,433 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:02:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:55,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:55,555 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:55,556 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:02:55,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:55,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911462290] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:55,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:55,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:55,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794955785] [2022-02-10 03:02:55,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:55,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:55,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:55,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:55,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:55,567 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) [2022-02-10 03:02:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:56,057 INFO L93 Difference]: Finished difference Result 317 states and 834 transitions. [2022-02-10 03:02:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:02:56,057 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 [2022-02-10 03:02:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:56,058 INFO L225 Difference]: With dead ends: 317 [2022-02-10 03:02:56,058 INFO L226 Difference]: Without dead ends: 317 [2022-02-10 03:02:56,058 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 [2022-02-10 03:02:56,058 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 [2022-02-10 03:02:56,058 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] [2022-02-10 03:02:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-10 03:02:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 230. [2022-02-10 03:02:56,060 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) [2022-02-10 03:02:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 642 transitions. [2022-02-10 03:02:56,061 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 642 transitions. Word has length 15 [2022-02-10 03:02:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:56,061 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 642 transitions. [2022-02-10 03:02:56,061 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) [2022-02-10 03:02:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 642 transitions. [2022-02-10 03:02:56,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:56,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:56,061 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:56,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-02-10 03:02:56,262 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 [2022-02-10 03:02:56,262 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:56,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash -442778249, now seen corresponding path program 109 times [2022-02-10 03:02:56,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:56,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647921631] [2022-02-10 03:02:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:56,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:56,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:56,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647921631] [2022-02-10 03:02:56,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647921631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:56,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099129772] [2022-02-10 03:02:56,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:02:56,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:56,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:56,347 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) [2022-02-10 03:02:56,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-10 03:02:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:56,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:56,523 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 37 treesize of output 31 [2022-02-10 03:02:56,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:56,525 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 31 treesize of output 25 [2022-02-10 03:02:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:56,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:56,662 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:56,662 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-10 03:02:56,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:56,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099129772] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:56,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:56,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:56,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114888448] [2022-02-10 03:02:56,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:56,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:56,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:56,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:56,678 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) [2022-02-10 03:02:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:56,937 INFO L93 Difference]: Finished difference Result 298 states and 792 transitions. [2022-02-10 03:02:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:02:56,938 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 [2022-02-10 03:02:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:56,938 INFO L225 Difference]: With dead ends: 298 [2022-02-10 03:02:56,938 INFO L226 Difference]: Without dead ends: 296 [2022-02-10 03:02:56,938 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 [2022-02-10 03:02:56,939 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 [2022-02-10 03:02:56,939 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] [2022-02-10 03:02:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-10 03:02:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 232. [2022-02-10 03:02:56,941 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) [2022-02-10 03:02:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 647 transitions. [2022-02-10 03:02:56,942 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 647 transitions. Word has length 15 [2022-02-10 03:02:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:56,942 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 647 transitions. [2022-02-10 03:02:56,942 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) [2022-02-10 03:02:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 647 transitions. [2022-02-10 03:02:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:56,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:56,942 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:56,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-02-10 03:02:57,142 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 [2022-02-10 03:02:57,143 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:57,143 INFO L85 PathProgramCache]: Analyzing trace with hash 484652857, now seen corresponding path program 110 times [2022-02-10 03:02:57,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:57,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998418437] [2022-02-10 03:02:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:57,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:57,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:57,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998418437] [2022-02-10 03:02:57,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998418437] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:57,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754183977] [2022-02-10 03:02:57,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:57,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:57,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:57,215 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) [2022-02-10 03:02:57,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-10 03:02:57,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:57,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:57,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:57,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:57,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:57,333 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 43 treesize of output 35 [2022-02-10 03:02:57,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:57,334 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 35 treesize of output 27 [2022-02-10 03:02:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:57,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:57,488 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:57,488 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 24 treesize of output 21 [2022-02-10 03:02:57,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:57,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754183977] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:57,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:57,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:57,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62577931] [2022-02-10 03:02:57,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:57,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:57,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:57,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:57,499 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) [2022-02-10 03:02:58,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:58,258 INFO L93 Difference]: Finished difference Result 396 states and 935 transitions. [2022-02-10 03:02:58,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:02:58,259 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 [2022-02-10 03:02:58,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:58,259 INFO L225 Difference]: With dead ends: 396 [2022-02-10 03:02:58,259 INFO L226 Difference]: Without dead ends: 396 [2022-02-10 03:02:58,260 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 [2022-02-10 03:02:58,260 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 [2022-02-10 03:02:58,260 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] [2022-02-10 03:02:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-02-10 03:02:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 234. [2022-02-10 03:02:58,263 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) [2022-02-10 03:02:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 656 transitions. [2022-02-10 03:02:58,263 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 656 transitions. Word has length 15 [2022-02-10 03:02:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:58,263 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 656 transitions. [2022-02-10 03:02:58,263 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) [2022-02-10 03:02:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 656 transitions. [2022-02-10 03:02:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:58,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:58,264 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:58,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-10 03:02:58,464 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 [2022-02-10 03:02:58,464 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1286269085, now seen corresponding path program 111 times [2022-02-10 03:02:58,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:58,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959605271] [2022-02-10 03:02:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:58,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:58,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:58,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959605271] [2022-02-10 03:02:58,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959605271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:58,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032531500] [2022-02-10 03:02:58,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:58,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:58,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:58,543 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) [2022-02-10 03:02:58,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-10 03:02:58,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:02:58,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:58,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:58,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:58,661 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 43 treesize of output 35 [2022-02-10 03:02:58,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:58,663 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 [2022-02-10 03:02:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:58,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:58,826 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:58,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:58,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:58,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032531500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:58,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:58,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:58,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099263659] [2022-02-10 03:02:58,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:58,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:58,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:58,846 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) [2022-02-10 03:02:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:59,295 INFO L93 Difference]: Finished difference Result 326 states and 836 transitions. [2022-02-10 03:02:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:02:59,295 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 [2022-02-10 03:02:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:59,296 INFO L225 Difference]: With dead ends: 326 [2022-02-10 03:02:59,296 INFO L226 Difference]: Without dead ends: 324 [2022-02-10 03:02:59,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:02:59,296 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:59,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 48 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:02:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-10 03:02:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 236. [2022-02-10 03:02:59,299 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) [2022-02-10 03:02:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 662 transitions. [2022-02-10 03:02:59,299 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 662 transitions. Word has length 15 [2022-02-10 03:02:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:59,299 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 662 transitions. [2022-02-10 03:02:59,299 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) [2022-02-10 03:02:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 662 transitions. [2022-02-10 03:02:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:02:59,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:59,300 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:59,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:59,515 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 [2022-02-10 03:02:59,516 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:02:59,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:59,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1290354505, now seen corresponding path program 112 times [2022-02-10 03:02:59,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:59,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738047733] [2022-02-10 03:02:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:59,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:59,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:59,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738047733] [2022-02-10 03:02:59,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738047733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:59,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631693426] [2022-02-10 03:02:59,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:59,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:59,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:59,599 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) [2022-02-10 03:02:59,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-10 03:02:59,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:59,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:59,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:02:59,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:59,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:59,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:02:59,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:59,729 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 35 treesize of output 27 [2022-02-10 03:02:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:59,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:59,889 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:02:59,889 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 38 treesize of output 31 [2022-02-10 03:02:59,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:02:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:59,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631693426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:59,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:59,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:02:59,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642166344] [2022-02-10 03:02:59,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:59,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:02:59,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:59,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:02:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:02:59,907 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) [2022-02-10 03:03:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:00,212 INFO L93 Difference]: Finished difference Result 316 states and 823 transitions. [2022-02-10 03:03:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:03:00,212 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 [2022-02-10 03:03:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:00,213 INFO L225 Difference]: With dead ends: 316 [2022-02-10 03:03:00,213 INFO L226 Difference]: Without dead ends: 316 [2022-02-10 03:03:00,213 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 [2022-02-10 03:03:00,213 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:00,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 80 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:03:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-10 03:03:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 233. [2022-02-10 03:03:00,216 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) [2022-02-10 03:03:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 651 transitions. [2022-02-10 03:03:00,216 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 651 transitions. Word has length 15 [2022-02-10 03:03:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:00,217 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 651 transitions. [2022-02-10 03:03:00,217 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) [2022-02-10 03:03:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 651 transitions. [2022-02-10 03:03:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:00,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:00,217 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:00,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-02-10 03:03:00,417 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 [2022-02-10 03:03:00,417 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:00,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:00,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1950903055, now seen corresponding path program 113 times [2022-02-10 03:03:00,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:00,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467858645] [2022-02-10 03:03:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:00,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:00,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:00,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467858645] [2022-02-10 03:03:00,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467858645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:00,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017142048] [2022-02-10 03:03:00,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:00,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:00,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:00,490 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) [2022-02-10 03:03:00,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-10 03:03:00,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:03:00,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:00,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:00,621 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 [2022-02-10 03:03:00,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:00,623 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 [2022-02-10 03:03:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:00,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:00,717 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:00,718 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:03:00,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:00,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017142048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:00,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:00,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:03:00,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875385825] [2022-02-10 03:03:00,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:00,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:00,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:00,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:00,733 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) [2022-02-10 03:03:00,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:00,861 INFO L93 Difference]: Finished difference Result 279 states and 745 transitions. [2022-02-10 03:03:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:03:00,862 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 [2022-02-10 03:03:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:00,862 INFO L225 Difference]: With dead ends: 279 [2022-02-10 03:03:00,862 INFO L226 Difference]: Without dead ends: 279 [2022-02-10 03:03:00,862 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 [2022-02-10 03:03:00,863 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 [2022-02-10 03:03:00,863 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] [2022-02-10 03:03:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-10 03:03:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 240. [2022-02-10 03:03:00,865 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) [2022-02-10 03:03:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 672 transitions. [2022-02-10 03:03:00,865 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 672 transitions. Word has length 15 [2022-02-10 03:03:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:00,865 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 672 transitions. [2022-02-10 03:03:00,866 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) [2022-02-10 03:03:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 672 transitions. [2022-02-10 03:03:00,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:00,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:00,866 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:00,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-02-10 03:03:01,067 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 [2022-02-10 03:03:01,067 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:01,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:01,068 INFO L85 PathProgramCache]: Analyzing trace with hash -396853931, now seen corresponding path program 114 times [2022-02-10 03:03:01,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:01,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466304237] [2022-02-10 03:03:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:01,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:01,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:01,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466304237] [2022-02-10 03:03:01,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466304237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:01,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363410715] [2022-02-10 03:03:01,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:01,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:01,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:01,151 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) [2022-02-10 03:03:01,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-10 03:03:01,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:03:01,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:01,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:01,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:01,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:01,299 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 37 treesize of output 31 [2022-02-10 03:03:01,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:01,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:01,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:01,408 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:01,409 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:03:01,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:01,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363410715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:01,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:01,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:03:01,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11776064] [2022-02-10 03:03:01,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:01,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:01,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:01,432 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) [2022-02-10 03:03:01,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:01,600 INFO L93 Difference]: Finished difference Result 264 states and 718 transitions. [2022-02-10 03:03:01,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:03:01,600 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 [2022-02-10 03:03:01,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:01,601 INFO L225 Difference]: With dead ends: 264 [2022-02-10 03:03:01,601 INFO L226 Difference]: Without dead ends: 261 [2022-02-10 03:03:01,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:03:01,601 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 [2022-02-10 03:03:01,601 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] [2022-02-10 03:03:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-10 03:03:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2022-02-10 03:03:01,604 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) [2022-02-10 03:03:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 672 transitions. [2022-02-10 03:03:01,604 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 672 transitions. Word has length 15 [2022-02-10 03:03:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:01,604 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 672 transitions. [2022-02-10 03:03:01,604 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) [2022-02-10 03:03:01,605 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 672 transitions. [2022-02-10 03:03:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:01,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:01,605 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:01,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-02-10 03:03:01,818 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 [2022-02-10 03:03:01,818 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:01,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:01,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1711260717, now seen corresponding path program 115 times [2022-02-10 03:03:01,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:01,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248372813] [2022-02-10 03:03:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:01,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:01,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:01,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248372813] [2022-02-10 03:03:01,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248372813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:01,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407622516] [2022-02-10 03:03:01,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:01,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:01,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:01,894 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) [2022-02-10 03:03:01,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-10 03:03:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:01,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:01,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:02,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:02,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:02,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:02,035 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 21 treesize of output 2 [2022-02-10 03:03:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:02,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:02,137 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:02,137 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 [2022-02-10 03:03:02,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:02,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407622516] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:02,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:02,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:03:02,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246249003] [2022-02-10 03:03:02,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:02,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:03:02,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:03:02,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:03:02,153 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) [2022-02-10 03:03:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:02,494 INFO L93 Difference]: Finished difference Result 298 states and 787 transitions. [2022-02-10 03:03:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:03:02,495 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 [2022-02-10 03:03:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:02,495 INFO L225 Difference]: With dead ends: 298 [2022-02-10 03:03:02,495 INFO L226 Difference]: Without dead ends: 298 [2022-02-10 03:03:02,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:03:02,496 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 [2022-02-10 03:03:02,496 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] [2022-02-10 03:03:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-10 03:03:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 243. [2022-02-10 03:03:02,498 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) [2022-02-10 03:03:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 680 transitions. [2022-02-10 03:03:02,499 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 680 transitions. Word has length 15 [2022-02-10 03:03:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:02,499 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 680 transitions. [2022-02-10 03:03:02,499 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) [2022-02-10 03:03:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 680 transitions. [2022-02-10 03:03:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:02,499 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:02,499 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:02,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-02-10 03:03:02,715 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 [2022-02-10 03:03:02,715 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1664005871, now seen corresponding path program 116 times [2022-02-10 03:03:02,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:02,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031891078] [2022-02-10 03:03:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:02,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:02,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:02,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031891078] [2022-02-10 03:03:02,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031891078] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:02,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565641840] [2022-02-10 03:03:02,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:02,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:02,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:02,797 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) [2022-02-10 03:03:02,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-10 03:03:02,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:02,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:02,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:02,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:02,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:02,943 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 37 treesize of output 31 [2022-02-10 03:03:02,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:02,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:02,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:03,060 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:03,060 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 35 [2022-02-10 03:03:03,062 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 [2022-02-10 03:03:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:03,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565641840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:03,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:03,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:03:03,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083956855] [2022-02-10 03:03:03,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:03,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:03:03,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:03:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:03:03,084 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) [2022-02-10 03:03:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:03,255 INFO L93 Difference]: Finished difference Result 266 states and 723 transitions. [2022-02-10 03:03:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:03:03,256 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 [2022-02-10 03:03:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:03,256 INFO L225 Difference]: With dead ends: 266 [2022-02-10 03:03:03,256 INFO L226 Difference]: Without dead ends: 262 [2022-02-10 03:03:03,256 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 [2022-02-10 03:03:03,257 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 [2022-02-10 03:03:03,257 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] [2022-02-10 03:03:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-10 03:03:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 243. [2022-02-10 03:03:03,259 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) [2022-02-10 03:03:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 678 transitions. [2022-02-10 03:03:03,260 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 678 transitions. Word has length 15 [2022-02-10 03:03:03,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:03,260 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 678 transitions. [2022-02-10 03:03:03,260 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) [2022-02-10 03:03:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 678 transitions. [2022-02-10 03:03:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:03,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:03,260 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:03,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-02-10 03:03:03,476 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 [2022-02-10 03:03:03,476 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:03,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:03,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1703530319, now seen corresponding path program 117 times [2022-02-10 03:03:03,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:03,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943474211] [2022-02-10 03:03:03,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:03,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:03,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:03,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943474211] [2022-02-10 03:03:03,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943474211] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:03,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153799820] [2022-02-10 03:03:03,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:03,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:03,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:03,565 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) [2022-02-10 03:03:03,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-10 03:03:03,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:03:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:03,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:03,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:03,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:03,673 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 43 treesize of output 35 [2022-02-10 03:03:03,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:03,675 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 35 treesize of output 27 [2022-02-10 03:03:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:03,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:03,822 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:03,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:03,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:03,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153799820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:03,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:03,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:03:03,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158726260] [2022-02-10 03:03:03,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:03,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:03:03,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:03:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:03:03,838 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) [2022-02-10 03:03:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:04,396 INFO L93 Difference]: Finished difference Result 375 states and 886 transitions. [2022-02-10 03:03:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:03:04,397 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 [2022-02-10 03:03:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:04,397 INFO L225 Difference]: With dead ends: 375 [2022-02-10 03:03:04,397 INFO L226 Difference]: Without dead ends: 375 [2022-02-10 03:03:04,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:03:04,398 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 [2022-02-10 03:03:04,398 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] [2022-02-10 03:03:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-02-10 03:03:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 242. [2022-02-10 03:03:04,400 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) [2022-02-10 03:03:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 677 transitions. [2022-02-10 03:03:04,401 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 677 transitions. Word has length 15 [2022-02-10 03:03:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:04,401 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 677 transitions. [2022-02-10 03:03:04,401 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) [2022-02-10 03:03:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 677 transitions. [2022-02-10 03:03:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:04,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:04,401 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:04,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-02-10 03:03:04,602 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 [2022-02-10 03:03:04,602 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash -901914091, now seen corresponding path program 118 times [2022-02-10 03:03:04,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:04,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163700369] [2022-02-10 03:03:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:04,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:04,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:04,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163700369] [2022-02-10 03:03:04,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163700369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:04,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513260774] [2022-02-10 03:03:04,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:04,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:04,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:04,680 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) [2022-02-10 03:03:04,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-10 03:03:04,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:04,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:04,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:04,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:04,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:04,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:04,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:04,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:04,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:04,933 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:04,933 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 35 [2022-02-10 03:03:04,935 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 [2022-02-10 03:03:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:04,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513260774] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:04,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:04,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:03:04,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729285729] [2022-02-10 03:03:04,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:04,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:03:04,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:04,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:03:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:03:04,952 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) [2022-02-10 03:03:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:05,230 INFO L93 Difference]: Finished difference Result 295 states and 763 transitions. [2022-02-10 03:03:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:03:05,231 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 [2022-02-10 03:03:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:05,231 INFO L225 Difference]: With dead ends: 295 [2022-02-10 03:03:05,231 INFO L226 Difference]: Without dead ends: 292 [2022-02-10 03:03:05,231 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 [2022-02-10 03:03:05,232 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 [2022-02-10 03:03:05,232 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] [2022-02-10 03:03:05,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-10 03:03:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 246. [2022-02-10 03:03:05,234 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) [2022-02-10 03:03:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 689 transitions. [2022-02-10 03:03:05,235 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 689 transitions. Word has length 15 [2022-02-10 03:03:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:05,235 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 689 transitions. [2022-02-10 03:03:05,235 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) [2022-02-10 03:03:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 689 transitions. [2022-02-10 03:03:05,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:05,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:05,235 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:05,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:05,435 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 [2022-02-10 03:03:05,436 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash 816429615, now seen corresponding path program 119 times [2022-02-10 03:03:05,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:05,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772422153] [2022-02-10 03:03:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:05,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:05,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:05,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772422153] [2022-02-10 03:03:05,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772422153] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:05,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635875920] [2022-02-10 03:03:05,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:05,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:05,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:05,521 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) [2022-02-10 03:03:05,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-10 03:03:05,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:03:05,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:05,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:05,630 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 43 treesize of output 35 [2022-02-10 03:03:05,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:05,631 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 35 treesize of output 27 [2022-02-10 03:03:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:05,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:05,763 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:05,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:05,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:05,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635875920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:05,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:05,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:03:05,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468348578] [2022-02-10 03:03:05,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:05,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:03:05,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:03:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:03:05,783 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) [2022-02-10 03:03:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:05,995 INFO L93 Difference]: Finished difference Result 292 states and 760 transitions. [2022-02-10 03:03:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:03:05,995 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 [2022-02-10 03:03:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:05,996 INFO L225 Difference]: With dead ends: 292 [2022-02-10 03:03:05,996 INFO L226 Difference]: Without dead ends: 292 [2022-02-10 03:03:05,996 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 [2022-02-10 03:03:05,996 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 [2022-02-10 03:03:05,996 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] [2022-02-10 03:03:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-10 03:03:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 242. [2022-02-10 03:03:05,998 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) [2022-02-10 03:03:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 676 transitions. [2022-02-10 03:03:05,999 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 676 transitions. Word has length 15 [2022-02-10 03:03:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:05,999 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 676 transitions. [2022-02-10 03:03:05,999 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) [2022-02-10 03:03:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 676 transitions. [2022-02-10 03:03:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:05,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:05,999 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:06,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-02-10 03:03:06,215 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 [2022-02-10 03:03:06,215 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash -638175337, now seen corresponding path program 120 times [2022-02-10 03:03:06,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:06,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965933067] [2022-02-10 03:03:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:06,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:06,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:06,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965933067] [2022-02-10 03:03:06,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965933067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:06,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475369743] [2022-02-10 03:03:06,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:06,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:06,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:06,285 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) [2022-02-10 03:03:06,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-10 03:03:06,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:03:06,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:06,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:06,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:06,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:06,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:06,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:06,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:06,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:06,497 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:06,498 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:03:06,499 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 11 treesize of output 7 [2022-02-10 03:03:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:06,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475369743] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:06,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:06,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:03:06,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785847158] [2022-02-10 03:03:06,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:06,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:06,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:06,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:06,514 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) [2022-02-10 03:03:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:06,705 INFO L93 Difference]: Finished difference Result 303 states and 791 transitions. [2022-02-10 03:03:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:03:06,705 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 [2022-02-10 03:03:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:06,706 INFO L225 Difference]: With dead ends: 303 [2022-02-10 03:03:06,706 INFO L226 Difference]: Without dead ends: 303 [2022-02-10 03:03:06,706 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 [2022-02-10 03:03:06,706 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 [2022-02-10 03:03:06,706 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] [2022-02-10 03:03:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-10 03:03:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 244. [2022-02-10 03:03:06,709 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) [2022-02-10 03:03:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 685 transitions. [2022-02-10 03:03:06,709 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 685 transitions. Word has length 15 [2022-02-10 03:03:06,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:06,709 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 685 transitions. [2022-02-10 03:03:06,709 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) [2022-02-10 03:03:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 685 transitions. [2022-02-10 03:03:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:06,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:06,710 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:06,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:06,910 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 [2022-02-10 03:03:06,910 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1557876045, now seen corresponding path program 121 times [2022-02-10 03:03:06,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:06,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387076515] [2022-02-10 03:03:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:06,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:06,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:06,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387076515] [2022-02-10 03:03:06,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387076515] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:06,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467337561] [2022-02-10 03:03:06,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:06,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:06,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:06,979 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) [2022-02-10 03:03:06,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-10 03:03:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:07,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:07,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:07,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:07,109 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 37 treesize of output 31 [2022-02-10 03:03:07,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:07,111 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 31 treesize of output 25 [2022-02-10 03:03:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:07,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:07,206 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:07,206 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 42 treesize of output 33 [2022-02-10 03:03:07,208 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 21 treesize of output 13 [2022-02-10 03:03:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:07,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467337561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:07,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:07,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:03:07,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003642531] [2022-02-10 03:03:07,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:07,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:07,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:07,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:07,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:07,231 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) [2022-02-10 03:03:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:07,497 INFO L93 Difference]: Finished difference Result 275 states and 737 transitions. [2022-02-10 03:03:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:03:07,498 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 [2022-02-10 03:03:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:07,498 INFO L225 Difference]: With dead ends: 275 [2022-02-10 03:03:07,498 INFO L226 Difference]: Without dead ends: 271 [2022-02-10 03:03:07,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:03:07,498 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 [2022-02-10 03:03:07,499 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] [2022-02-10 03:03:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-02-10 03:03:07,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 244. [2022-02-10 03:03:07,501 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) [2022-02-10 03:03:07,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 682 transitions. [2022-02-10 03:03:07,501 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 682 transitions. Word has length 15 [2022-02-10 03:03:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:07,501 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 682 transitions. [2022-02-10 03:03:07,502 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) [2022-02-10 03:03:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 682 transitions. [2022-02-10 03:03:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:07,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:07,502 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:07,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-02-10 03:03:07,702 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 [2022-02-10 03:03:07,702 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash 977076247, now seen corresponding path program 122 times [2022-02-10 03:03:07,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:07,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781058371] [2022-02-10 03:03:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:07,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:07,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:07,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781058371] [2022-02-10 03:03:07,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781058371] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:07,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108507566] [2022-02-10 03:03:07,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:07,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:07,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:07,790 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) [2022-02-10 03:03:07,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-10 03:03:07,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:07,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:07,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:07,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:07,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:07,883 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 43 treesize of output 35 [2022-02-10 03:03:07,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:07,884 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 35 treesize of output 27 [2022-02-10 03:03:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:07,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:08,004 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:08,004 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:03:08,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:08,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108507566] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:08,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:08,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:03:08,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106949697] [2022-02-10 03:03:08,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:08,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:08,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:08,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:08,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:08,020 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) [2022-02-10 03:03:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:08,430 INFO L93 Difference]: Finished difference Result 299 states and 774 transitions. [2022-02-10 03:03:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:03:08,430 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 [2022-02-10 03:03:08,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:08,431 INFO L225 Difference]: With dead ends: 299 [2022-02-10 03:03:08,431 INFO L226 Difference]: Without dead ends: 297 [2022-02-10 03:03:08,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:03:08,431 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-10 03:03:08,432 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] [2022-02-10 03:03:08,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-10 03:03:08,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 244. [2022-02-10 03:03:08,434 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) [2022-02-10 03:03:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 679 transitions. [2022-02-10 03:03:08,434 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 679 transitions. Word has length 15 [2022-02-10 03:03:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:08,435 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 679 transitions. [2022-02-10 03:03:08,435 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) [2022-02-10 03:03:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 679 transitions. [2022-02-10 03:03:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:08,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:08,435 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:08,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:08,635 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 [2022-02-10 03:03:08,636 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2119849935, now seen corresponding path program 123 times [2022-02-10 03:03:08,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:08,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883205393] [2022-02-10 03:03:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:08,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:08,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:08,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883205393] [2022-02-10 03:03:08,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883205393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:08,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579566337] [2022-02-10 03:03:08,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:08,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:08,704 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) [2022-02-10 03:03:08,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-10 03:03:08,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:03:08,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:08,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:08,797 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 43 treesize of output 35 [2022-02-10 03:03:08,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:08,798 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 35 treesize of output 27 [2022-02-10 03:03:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:08,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:08,913 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:08,913 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:03:08,915 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 21 treesize of output 13 [2022-02-10 03:03:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:08,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579566337] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:08,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:08,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:03:08,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315826275] [2022-02-10 03:03:08,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:08,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:08,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:08,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:08,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:08,936 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) [2022-02-10 03:03:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:09,193 INFO L93 Difference]: Finished difference Result 339 states and 834 transitions. [2022-02-10 03:03:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:03:09,194 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 [2022-02-10 03:03:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:09,194 INFO L225 Difference]: With dead ends: 339 [2022-02-10 03:03:09,194 INFO L226 Difference]: Without dead ends: 339 [2022-02-10 03:03:09,194 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 [2022-02-10 03:03:09,195 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 [2022-02-10 03:03:09,195 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] [2022-02-10 03:03:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-10 03:03:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 250. [2022-02-10 03:03:09,197 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) [2022-02-10 03:03:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 701 transitions. [2022-02-10 03:03:09,198 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 701 transitions. Word has length 15 [2022-02-10 03:03:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:09,198 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 701 transitions. [2022-02-10 03:03:09,198 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) [2022-02-10 03:03:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 701 transitions. [2022-02-10 03:03:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:09,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:09,198 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:09,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-02-10 03:03:09,399 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 [2022-02-10 03:03:09,399 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:09,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1318233707, now seen corresponding path program 124 times [2022-02-10 03:03:09,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:09,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133618907] [2022-02-10 03:03:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:09,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:09,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:09,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133618907] [2022-02-10 03:03:09,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133618907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:09,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923911662] [2022-02-10 03:03:09,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:09,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:09,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:09,467 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) [2022-02-10 03:03:09,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-10 03:03:09,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:09,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:09,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:09,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:09,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:09,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:09,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:09,562 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 35 treesize of output 27 [2022-02-10 03:03:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:09,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:09,694 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:09,694 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:03:09,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:09,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923911662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:09,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:09,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:03:09,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102873081] [2022-02-10 03:03:09,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:09,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:09,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:09,713 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) [2022-02-10 03:03:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:10,249 INFO L93 Difference]: Finished difference Result 351 states and 848 transitions. [2022-02-10 03:03:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 03:03:10,249 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 [2022-02-10 03:03:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:10,250 INFO L225 Difference]: With dead ends: 351 [2022-02-10 03:03:10,250 INFO L226 Difference]: Without dead ends: 347 [2022-02-10 03:03:10,250 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 [2022-02-10 03:03:10,251 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 [2022-02-10 03:03:10,251 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] [2022-02-10 03:03:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-10 03:03:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 256. [2022-02-10 03:03:10,254 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) [2022-02-10 03:03:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 716 transitions. [2022-02-10 03:03:10,254 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 716 transitions. Word has length 15 [2022-02-10 03:03:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:10,254 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 716 transitions. [2022-02-10 03:03:10,254 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) [2022-02-10 03:03:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 716 transitions. [2022-02-10 03:03:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:10,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:10,255 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:10,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:10,467 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 [2022-02-10 03:03:10,467 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:10,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:10,467 INFO L85 PathProgramCache]: Analyzing trace with hash 400109999, now seen corresponding path program 125 times [2022-02-10 03:03:10,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:10,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560805426] [2022-02-10 03:03:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:10,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:10,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:10,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560805426] [2022-02-10 03:03:10,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560805426] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:10,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934155089] [2022-02-10 03:03:10,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:10,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:10,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:10,577 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) [2022-02-10 03:03:10,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-10 03:03:10,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:03:10,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:10,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:10,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:10,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:10,675 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 43 treesize of output 35 [2022-02-10 03:03:10,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:10,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:10,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:10,808 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:10,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:10,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:10,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934155089] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:10,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:10,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:03:10,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162068226] [2022-02-10 03:03:10,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:10,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:10,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:10,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:10,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:10,825 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) [2022-02-10 03:03:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:11,101 INFO L93 Difference]: Finished difference Result 334 states and 826 transitions. [2022-02-10 03:03:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:03:11,101 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 [2022-02-10 03:03:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:11,102 INFO L225 Difference]: With dead ends: 334 [2022-02-10 03:03:11,102 INFO L226 Difference]: Without dead ends: 334 [2022-02-10 03:03:11,102 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 [2022-02-10 03:03:11,102 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-10 03:03:11,102 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] [2022-02-10 03:03:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-10 03:03:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 250. [2022-02-10 03:03:11,105 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) [2022-02-10 03:03:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 693 transitions. [2022-02-10 03:03:11,105 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 693 transitions. Word has length 15 [2022-02-10 03:03:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:11,106 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 693 transitions. [2022-02-10 03:03:11,106 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) [2022-02-10 03:03:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 693 transitions. [2022-02-10 03:03:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:11,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:11,106 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:11,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:11,317 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 [2022-02-10 03:03:11,317 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:11,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:11,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1310503309, now seen corresponding path program 126 times [2022-02-10 03:03:11,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:11,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984278210] [2022-02-10 03:03:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:11,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:11,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:11,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984278210] [2022-02-10 03:03:11,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984278210] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:11,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178838117] [2022-02-10 03:03:11,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:11,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:11,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:11,380 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) [2022-02-10 03:03:11,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-10 03:03:11,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:03:11,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:11,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:11,491 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:03:11,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:11,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:11,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:11,499 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 7 treesize of output 1 [2022-02-10 03:03:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:11,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:11,589 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:11,589 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 28 treesize of output 23 [2022-02-10 03:03:11,590 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 11 treesize of output 7 [2022-02-10 03:03:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:11,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178838117] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:11,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:11,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-10 03:03:11,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744602317] [2022-02-10 03:03:11,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:11,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:11,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:11,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:11,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:11,621 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) [2022-02-10 03:03:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:11,864 INFO L93 Difference]: Finished difference Result 319 states and 801 transitions. [2022-02-10 03:03:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:03:11,864 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 [2022-02-10 03:03:11,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:11,865 INFO L225 Difference]: With dead ends: 319 [2022-02-10 03:03:11,865 INFO L226 Difference]: Without dead ends: 319 [2022-02-10 03:03:11,865 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 [2022-02-10 03:03:11,865 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 [2022-02-10 03:03:11,865 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] [2022-02-10 03:03:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-02-10 03:03:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 246. [2022-02-10 03:03:11,868 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) [2022-02-10 03:03:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 677 transitions. [2022-02-10 03:03:11,868 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 677 transitions. Word has length 15 [2022-02-10 03:03:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:11,868 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 677 transitions. [2022-02-10 03:03:11,869 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) [2022-02-10 03:03:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 677 transitions. [2022-02-10 03:03:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:11,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:11,869 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:11,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:12,082 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 [2022-02-10 03:03:12,082 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:12,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:12,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1065104775, now seen corresponding path program 127 times [2022-02-10 03:03:12,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:12,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785649056] [2022-02-10 03:03:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:12,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:12,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:12,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785649056] [2022-02-10 03:03:12,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785649056] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:12,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634520807] [2022-02-10 03:03:12,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:12,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:12,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:12,149 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) [2022-02-10 03:03:12,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-10 03:03:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:12,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:12,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:12,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:12,297 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 21 treesize of output 2 [2022-02-10 03:03:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:12,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:12,391 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:12,391 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:03:12,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:12,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634520807] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:12,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:12,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:03:12,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401632143] [2022-02-10 03:03:12,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:12,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:03:12,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:12,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:03:12,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:03:12,414 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) [2022-02-10 03:03:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:12,596 INFO L93 Difference]: Finished difference Result 329 states and 829 transitions. [2022-02-10 03:03:12,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:03:12,597 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 [2022-02-10 03:03:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:12,597 INFO L225 Difference]: With dead ends: 329 [2022-02-10 03:03:12,597 INFO L226 Difference]: Without dead ends: 329 [2022-02-10 03:03:12,597 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 [2022-02-10 03:03:12,598 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 [2022-02-10 03:03:12,598 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] [2022-02-10 03:03:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-10 03:03:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 262. [2022-02-10 03:03:12,600 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) [2022-02-10 03:03:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 730 transitions. [2022-02-10 03:03:12,601 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 730 transitions. Word has length 15 [2022-02-10 03:03:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:12,601 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 730 transitions. [2022-02-10 03:03:12,601 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) [2022-02-10 03:03:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 730 transitions. [2022-02-10 03:03:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:12,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:12,601 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:12,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-02-10 03:03:12,802 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 [2022-02-10 03:03:12,802 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:12,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:12,802 INFO L85 PathProgramCache]: Analyzing trace with hash 663942559, now seen corresponding path program 128 times [2022-02-10 03:03:12,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:12,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314634780] [2022-02-10 03:03:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:12,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:12,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:12,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314634780] [2022-02-10 03:03:12,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314634780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:12,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770001645] [2022-02-10 03:03:12,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:12,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:12,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:12,869 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) [2022-02-10 03:03:12,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-10 03:03:12,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:12,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:12,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:12,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:13,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:13,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:13,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:13,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:13,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:13,108 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:13,109 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:03:13,110 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 13 treesize of output 9 [2022-02-10 03:03:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:13,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770001645] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:13,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:13,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:03:13,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120076964] [2022-02-10 03:03:13,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:13,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:03:13,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:13,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:03:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:03:13,124 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) [2022-02-10 03:03:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:13,277 INFO L93 Difference]: Finished difference Result 341 states and 868 transitions. [2022-02-10 03:03:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:03:13,277 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 [2022-02-10 03:03:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:13,278 INFO L225 Difference]: With dead ends: 341 [2022-02-10 03:03:13,278 INFO L226 Difference]: Without dead ends: 341 [2022-02-10 03:03:13,278 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 [2022-02-10 03:03:13,278 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 [2022-02-10 03:03:13,278 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] [2022-02-10 03:03:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-02-10 03:03:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 270. [2022-02-10 03:03:13,281 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) [2022-02-10 03:03:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 758 transitions. [2022-02-10 03:03:13,281 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 758 transitions. Word has length 15 [2022-02-10 03:03:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:13,282 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 758 transitions. [2022-02-10 03:03:13,282 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) [2022-02-10 03:03:13,282 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 758 transitions. [2022-02-10 03:03:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:13,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:13,282 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:13,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-02-10 03:03:13,482 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 [2022-02-10 03:03:13,483 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:13,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:13,483 INFO L85 PathProgramCache]: Analyzing trace with hash 488944349, now seen corresponding path program 129 times [2022-02-10 03:03:13,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:13,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463862238] [2022-02-10 03:03:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:13,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:13,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:13,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463862238] [2022-02-10 03:03:13,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463862238] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:13,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400364111] [2022-02-10 03:03:13,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:13,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:13,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:13,553 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) [2022-02-10 03:03:13,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-10 03:03:13,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:03:13,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:13,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:13,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:13,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:13,715 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:03:13,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:13,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:13,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:13,819 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:13,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:13,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:13,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400364111] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:13,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:13,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:03:13,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959642492] [2022-02-10 03:03:13,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:13,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:03:13,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:13,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:03:13,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:03:13,839 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) [2022-02-10 03:03:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:14,085 INFO L93 Difference]: Finished difference Result 319 states and 817 transitions. [2022-02-10 03:03:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:03:14,086 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 [2022-02-10 03:03:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:14,086 INFO L225 Difference]: With dead ends: 319 [2022-02-10 03:03:14,086 INFO L226 Difference]: Without dead ends: 313 [2022-02-10 03:03:14,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:03:14,087 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 [2022-02-10 03:03:14,087 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] [2022-02-10 03:03:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-10 03:03:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 273. [2022-02-10 03:03:14,090 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) [2022-02-10 03:03:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 760 transitions. [2022-02-10 03:03:14,090 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 760 transitions. Word has length 15 [2022-02-10 03:03:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:14,090 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 760 transitions. [2022-02-10 03:03:14,090 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) [2022-02-10 03:03:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 760 transitions. [2022-02-10 03:03:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:14,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:14,091 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:14,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-02-10 03:03:14,291 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 [2022-02-10 03:03:14,291 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash -825462437, now seen corresponding path program 130 times [2022-02-10 03:03:14,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:14,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248592893] [2022-02-10 03:03:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:14,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:14,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:14,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248592893] [2022-02-10 03:03:14,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248592893] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:14,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979762029] [2022-02-10 03:03:14,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:14,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:14,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:14,364 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) [2022-02-10 03:03:14,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-10 03:03:14,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:14,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:14,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:14,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:14,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:14,513 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:03:14,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:14,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:14,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:14,625 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:14,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:14,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:14,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979762029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:14,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:14,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:03:14,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220260933] [2022-02-10 03:03:14,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:14,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:03:14,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:14,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:03:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:03:14,640 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) [2022-02-10 03:03:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:15,116 INFO L93 Difference]: Finished difference Result 355 states and 889 transitions. [2022-02-10 03:03:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:03:15,116 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 [2022-02-10 03:03:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:15,117 INFO L225 Difference]: With dead ends: 355 [2022-02-10 03:03:15,117 INFO L226 Difference]: Without dead ends: 355 [2022-02-10 03:03:15,117 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 [2022-02-10 03:03:15,117 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:15,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 78 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 390 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-02-10 03:03:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-02-10 03:03:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 270. [2022-02-10 03:03:15,120 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) [2022-02-10 03:03:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 756 transitions. [2022-02-10 03:03:15,121 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 756 transitions. Word has length 15 [2022-02-10 03:03:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:15,121 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 756 transitions. [2022-02-10 03:03:15,121 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) [2022-02-10 03:03:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 756 transitions. [2022-02-10 03:03:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:15,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:15,122 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:15,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-02-10 03:03:15,322 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 [2022-02-10 03:03:15,322 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:15,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1745163145, now seen corresponding path program 131 times [2022-02-10 03:03:15,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:15,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916575537] [2022-02-10 03:03:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:15,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:15,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:15,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916575537] [2022-02-10 03:03:15,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916575537] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:15,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252040675] [2022-02-10 03:03:15,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:15,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:15,394 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) [2022-02-10 03:03:15,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-10 03:03:15,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:15,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:15,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:15,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:15,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:15,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:15,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:15,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:15,668 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:15,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:15,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:15,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252040675] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:15,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:15,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:03:15,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523346907] [2022-02-10 03:03:15,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:15,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:03:15,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:15,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:03:15,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:03:15,688 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) [2022-02-10 03:03:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:16,029 INFO L93 Difference]: Finished difference Result 311 states and 807 transitions. [2022-02-10 03:03:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:03:16,030 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 [2022-02-10 03:03:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:16,030 INFO L225 Difference]: With dead ends: 311 [2022-02-10 03:03:16,030 INFO L226 Difference]: Without dead ends: 307 [2022-02-10 03:03:16,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:03:16,031 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-10 03:03:16,031 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] [2022-02-10 03:03:16,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-10 03:03:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 271. [2022-02-10 03:03:16,034 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) [2022-02-10 03:03:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 757 transitions. [2022-02-10 03:03:16,034 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 757 transitions. Word has length 15 [2022-02-10 03:03:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:16,034 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 757 transitions. [2022-02-10 03:03:16,034 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) [2022-02-10 03:03:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 757 transitions. [2022-02-10 03:03:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:16,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:16,035 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:16,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-02-10 03:03:16,235 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 [2022-02-10 03:03:16,235 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash -817732039, now seen corresponding path program 132 times [2022-02-10 03:03:16,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:16,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351246485] [2022-02-10 03:03:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:16,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:16,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:16,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351246485] [2022-02-10 03:03:16,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351246485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:16,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976549066] [2022-02-10 03:03:16,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:16,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:16,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:16,324 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) [2022-02-10 03:03:16,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-10 03:03:16,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:03:16,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:16,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:16,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:16,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:16,440 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:03:16,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:16,442 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:03:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:16,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:16,596 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:16,596 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 30 treesize of output 27 [2022-02-10 03:03:16,598 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 13 treesize of output 9 [2022-02-10 03:03:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:16,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976549066] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:16,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:16,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:03:16,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047095228] [2022-02-10 03:03:16,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:16,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:03:16,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:03:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:03:16,611 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) [2022-02-10 03:03:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:17,101 INFO L93 Difference]: Finished difference Result 368 states and 877 transitions. [2022-02-10 03:03:17,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:03:17,102 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 [2022-02-10 03:03:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:17,102 INFO L225 Difference]: With dead ends: 368 [2022-02-10 03:03:17,102 INFO L226 Difference]: Without dead ends: 367 [2022-02-10 03:03:17,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:03:17,103 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:17,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 84 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:03:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-10 03:03:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 259. [2022-02-10 03:03:17,106 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) [2022-02-10 03:03:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 713 transitions. [2022-02-10 03:03:17,106 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 713 transitions. Word has length 15 [2022-02-10 03:03:17,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:17,106 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 713 transitions. [2022-02-10 03:03:17,106 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) [2022-02-10 03:03:17,106 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 713 transitions. [2022-02-10 03:03:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:17,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:17,107 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:17,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:17,319 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 [2022-02-10 03:03:17,319 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:17,319 INFO L85 PathProgramCache]: Analyzing trace with hash -16115811, now seen corresponding path program 133 times [2022-02-10 03:03:17,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:17,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219896256] [2022-02-10 03:03:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:17,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:17,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:17,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219896256] [2022-02-10 03:03:17,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219896256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:17,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002077913] [2022-02-10 03:03:17,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:17,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:17,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:17,394 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) [2022-02-10 03:03:17,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-10 03:03:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:17,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:17,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:17,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:17,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:17,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:17,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:17,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:17,659 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:17,660 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:03:17,661 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 [2022-02-10 03:03:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:17,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002077913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:17,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:17,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:03:17,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716543319] [2022-02-10 03:03:17,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:17,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:03:17,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:03:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:03:17,679 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) [2022-02-10 03:03:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:18,055 INFO L93 Difference]: Finished difference Result 316 states and 791 transitions. [2022-02-10 03:03:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:03:18,055 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 [2022-02-10 03:03:18,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:18,056 INFO L225 Difference]: With dead ends: 316 [2022-02-10 03:03:18,056 INFO L226 Difference]: Without dead ends: 312 [2022-02-10 03:03:18,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:03:18,056 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 75 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-10 03:03:18,056 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] [2022-02-10 03:03:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-10 03:03:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 263. [2022-02-10 03:03:18,059 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) [2022-02-10 03:03:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 725 transitions. [2022-02-10 03:03:18,060 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 725 transitions. Word has length 15 [2022-02-10 03:03:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:18,060 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 725 transitions. [2022-02-10 03:03:18,060 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) [2022-02-10 03:03:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 725 transitions. [2022-02-10 03:03:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:18,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:18,060 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:18,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-02-10 03:03:18,261 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 [2022-02-10 03:03:18,262 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:18,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1702227895, now seen corresponding path program 134 times [2022-02-10 03:03:18,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:18,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651117135] [2022-02-10 03:03:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:18,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:18,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:18,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651117135] [2022-02-10 03:03:18,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651117135] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:18,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133869370] [2022-02-10 03:03:18,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:18,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:18,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:18,337 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) [2022-02-10 03:03:18,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-10 03:03:18,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:18,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:18,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:18,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:18,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:18,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:18,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:18,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:18,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:18,587 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:18,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:18,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:18,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133869370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:18,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:18,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:03:18,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136714612] [2022-02-10 03:03:18,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:18,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:03:18,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:03:18,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:03:18,607 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) [2022-02-10 03:03:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:18,863 INFO L93 Difference]: Finished difference Result 306 states and 779 transitions. [2022-02-10 03:03:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:03:18,864 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 [2022-02-10 03:03:18,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:18,864 INFO L225 Difference]: With dead ends: 306 [2022-02-10 03:03:18,864 INFO L226 Difference]: Without dead ends: 306 [2022-02-10 03:03:18,864 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 [2022-02-10 03:03:18,865 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 [2022-02-10 03:03:18,865 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] [2022-02-10 03:03:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-02-10 03:03:18,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 256. [2022-02-10 03:03:18,867 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) [2022-02-10 03:03:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 701 transitions. [2022-02-10 03:03:18,868 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 701 transitions. Word has length 15 [2022-02-10 03:03:18,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:18,868 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 701 transitions. [2022-02-10 03:03:18,868 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) [2022-02-10 03:03:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 701 transitions. [2022-02-10 03:03:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:18,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:18,868 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:18,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-02-10 03:03:19,069 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 [2022-02-10 03:03:19,069 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash -846468645, now seen corresponding path program 135 times [2022-02-10 03:03:19,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:19,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809757037] [2022-02-10 03:03:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:19,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:19,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:19,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809757037] [2022-02-10 03:03:19,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809757037] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:19,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331599808] [2022-02-10 03:03:19,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:19,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:19,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:19,130 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) [2022-02-10 03:03:19,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-10 03:03:19,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:03:19,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:19,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:19,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:19,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:19,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:19,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:19,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:19,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:19,355 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:19,356 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:03:19,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:19,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331599808] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:19,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:19,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:03:19,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173992829] [2022-02-10 03:03:19,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:19,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:19,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:19,373 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) [2022-02-10 03:03:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:19,539 INFO L93 Difference]: Finished difference Result 328 states and 840 transitions. [2022-02-10 03:03:19,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:03:19,539 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 [2022-02-10 03:03:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:19,540 INFO L225 Difference]: With dead ends: 328 [2022-02-10 03:03:19,540 INFO L226 Difference]: Without dead ends: 328 [2022-02-10 03:03:19,540 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 [2022-02-10 03:03:19,540 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 [2022-02-10 03:03:19,540 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] [2022-02-10 03:03:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-10 03:03:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 265. [2022-02-10 03:03:19,543 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) [2022-02-10 03:03:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 736 transitions. [2022-02-10 03:03:19,543 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 736 transitions. Word has length 15 [2022-02-10 03:03:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:19,543 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 736 transitions. [2022-02-10 03:03:19,543 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) [2022-02-10 03:03:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 736 transitions. [2022-02-10 03:03:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:19,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:19,544 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:19,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-02-10 03:03:19,744 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 [2022-02-10 03:03:19,744 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1766169353, now seen corresponding path program 136 times [2022-02-10 03:03:19,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:19,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085045856] [2022-02-10 03:03:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:19,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:19,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:19,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085045856] [2022-02-10 03:03:19,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085045856] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:19,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61746182] [2022-02-10 03:03:19,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:19,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:19,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:19,808 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) [2022-02-10 03:03:19,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-10 03:03:19,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:19,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:19,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:19,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:19,949 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 37 treesize of output 31 [2022-02-10 03:03:19,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:19,951 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 31 treesize of output 25 [2022-02-10 03:03:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:19,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:20,046 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:20,047 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:03:20,049 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 21 treesize of output 13 [2022-02-10 03:03:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:20,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61746182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:20,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:20,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:03:20,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110693241] [2022-02-10 03:03:20,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:20,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:20,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:20,069 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) [2022-02-10 03:03:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:20,313 INFO L93 Difference]: Finished difference Result 302 states and 784 transitions. [2022-02-10 03:03:20,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:03:20,313 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 [2022-02-10 03:03:20,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:20,314 INFO L225 Difference]: With dead ends: 302 [2022-02-10 03:03:20,314 INFO L226 Difference]: Without dead ends: 298 [2022-02-10 03:03:20,314 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 [2022-02-10 03:03:20,314 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:20,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 54 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-02-10 03:03:20,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-10 03:03:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 265. [2022-02-10 03:03:20,317 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) [2022-02-10 03:03:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 734 transitions. [2022-02-10 03:03:20,318 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 734 transitions. Word has length 15 [2022-02-10 03:03:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:20,318 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 734 transitions. [2022-02-10 03:03:20,318 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) [2022-02-10 03:03:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 734 transitions. [2022-02-10 03:03:20,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:20,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:20,318 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:20,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:20,518 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 [2022-02-10 03:03:20,519 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:20,519 INFO L85 PathProgramCache]: Analyzing trace with hash -838738247, now seen corresponding path program 137 times [2022-02-10 03:03:20,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:20,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584297742] [2022-02-10 03:03:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:20,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:20,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:20,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584297742] [2022-02-10 03:03:20,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584297742] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:20,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638215514] [2022-02-10 03:03:20,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:20,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:20,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:20,585 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) [2022-02-10 03:03:20,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-10 03:03:20,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:03:20,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:20,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:20,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:20,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:20,690 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 43 treesize of output 35 [2022-02-10 03:03:20,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:20,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:20,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:20,817 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:20,818 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:03:20,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:20,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638215514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:20,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:20,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:03:20,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476871850] [2022-02-10 03:03:20,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:20,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:20,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:20,835 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) [2022-02-10 03:03:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:21,065 INFO L93 Difference]: Finished difference Result 364 states and 887 transitions. [2022-02-10 03:03:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:03:21,065 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 [2022-02-10 03:03:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:21,066 INFO L225 Difference]: With dead ends: 364 [2022-02-10 03:03:21,066 INFO L226 Difference]: Without dead ends: 363 [2022-02-10 03:03:21,066 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 [2022-02-10 03:03:21,066 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 [2022-02-10 03:03:21,066 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] [2022-02-10 03:03:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-02-10 03:03:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 267. [2022-02-10 03:03:21,069 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) [2022-02-10 03:03:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 740 transitions. [2022-02-10 03:03:21,070 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 740 transitions. Word has length 15 [2022-02-10 03:03:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:21,070 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 740 transitions. [2022-02-10 03:03:21,070 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) [2022-02-10 03:03:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 740 transitions. [2022-02-10 03:03:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:21,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:21,070 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:21,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-02-10 03:03:21,270 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 [2022-02-10 03:03:21,271 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:21,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:21,271 INFO L85 PathProgramCache]: Analyzing trace with hash -37122019, now seen corresponding path program 138 times [2022-02-10 03:03:21,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:21,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720747064] [2022-02-10 03:03:21,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:21,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:21,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:21,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720747064] [2022-02-10 03:03:21,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720747064] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:21,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363592625] [2022-02-10 03:03:21,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:21,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:21,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:21,336 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) [2022-02-10 03:03:21,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-10 03:03:21,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:03:21,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:21,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:21,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:21,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:21,437 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 [2022-02-10 03:03:21,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:21,439 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:03:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:21,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:21,565 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:21,566 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 42 treesize of output 33 [2022-02-10 03:03:21,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:21,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363592625] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:21,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:21,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:03:21,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275232474] [2022-02-10 03:03:21,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:21,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:21,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:21,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:21,587 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) [2022-02-10 03:03:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:21,905 INFO L93 Difference]: Finished difference Result 330 states and 821 transitions. [2022-02-10 03:03:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:03:21,905 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 [2022-02-10 03:03:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:21,905 INFO L225 Difference]: With dead ends: 330 [2022-02-10 03:03:21,906 INFO L226 Difference]: Without dead ends: 327 [2022-02-10 03:03:21,906 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 [2022-02-10 03:03:21,906 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 [2022-02-10 03:03:21,906 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] [2022-02-10 03:03:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-10 03:03:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 269. [2022-02-10 03:03:21,913 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) [2022-02-10 03:03:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 744 transitions. [2022-02-10 03:03:21,913 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 744 transitions. Word has length 15 [2022-02-10 03:03:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:21,913 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 744 transitions. [2022-02-10 03:03:21,913 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) [2022-02-10 03:03:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 744 transitions. [2022-02-10 03:03:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:21,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:21,914 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:21,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-02-10 03:03:22,114 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 [2022-02-10 03:03:22,114 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:22,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1681221687, now seen corresponding path program 139 times [2022-02-10 03:03:22,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:22,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937788102] [2022-02-10 03:03:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:22,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:22,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:22,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937788102] [2022-02-10 03:03:22,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937788102] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:22,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839955360] [2022-02-10 03:03:22,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:22,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:22,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:22,181 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) [2022-02-10 03:03:22,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-10 03:03:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:22,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:22,281 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:03:22,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:22,283 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 35 treesize of output 27 [2022-02-10 03:03:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:22,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:22,398 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:22,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:22,400 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 21 treesize of output 13 [2022-02-10 03:03:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:22,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839955360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:22,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:22,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:03:22,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353582878] [2022-02-10 03:03:22,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:22,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:22,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:22,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:22,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:22,421 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) [2022-02-10 03:03:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:22,611 INFO L93 Difference]: Finished difference Result 316 states and 804 transitions. [2022-02-10 03:03:22,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:03:22,611 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 [2022-02-10 03:03:22,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:22,612 INFO L225 Difference]: With dead ends: 316 [2022-02-10 03:03:22,612 INFO L226 Difference]: Without dead ends: 316 [2022-02-10 03:03:22,612 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 [2022-02-10 03:03:22,612 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 [2022-02-10 03:03:22,612 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] [2022-02-10 03:03:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-10 03:03:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 262. [2022-02-10 03:03:22,615 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) [2022-02-10 03:03:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 717 transitions. [2022-02-10 03:03:22,616 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 717 transitions. Word has length 15 [2022-02-10 03:03:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:22,616 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 717 transitions. [2022-02-10 03:03:22,616 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) [2022-02-10 03:03:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 717 transitions. [2022-02-10 03:03:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:22,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:22,616 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:22,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:22,832 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 [2022-02-10 03:03:22,832 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:22,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:22,833 INFO L85 PathProgramCache]: Analyzing trace with hash -720622057, now seen corresponding path program 140 times [2022-02-10 03:03:22,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:22,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672048288] [2022-02-10 03:03:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:22,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:03:22,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:22,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672048288] [2022-02-10 03:03:22,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672048288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:22,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882958996] [2022-02-10 03:03:22,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:22,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:22,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:22,900 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) [2022-02-10 03:03:22,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-10 03:03:22,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:22,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:22,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:22,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:23,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:23,000 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 43 treesize of output 35 [2022-02-10 03:03:23,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:23,002 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 35 treesize of output 27 [2022-02-10 03:03:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:23,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:23,123 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:23,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:23,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:03:23,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882958996] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:23,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:23,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:03:23,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873832410] [2022-02-10 03:03:23,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:23,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:23,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:23,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:23,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:23,146 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) [2022-02-10 03:03:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:23,480 INFO L93 Difference]: Finished difference Result 311 states and 789 transitions. [2022-02-10 03:03:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:03:23,480 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 [2022-02-10 03:03:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:23,481 INFO L225 Difference]: With dead ends: 311 [2022-02-10 03:03:23,481 INFO L226 Difference]: Without dead ends: 309 [2022-02-10 03:03:23,481 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 [2022-02-10 03:03:23,481 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 [2022-02-10 03:03:23,481 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] [2022-02-10 03:03:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-10 03:03:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 262. [2022-02-10 03:03:23,484 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) [2022-02-10 03:03:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 715 transitions. [2022-02-10 03:03:23,484 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 715 transitions. Word has length 15 [2022-02-10 03:03:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:23,484 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 715 transitions. [2022-02-10 03:03:23,484 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) [2022-02-10 03:03:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 715 transitions. [2022-02-10 03:03:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:23,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:23,485 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:23,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-02-10 03:03:23,685 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 [2022-02-10 03:03:23,685 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:23,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:23,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1008425277, now seen corresponding path program 141 times [2022-02-10 03:03:23,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:23,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438718609] [2022-02-10 03:03:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:23,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:03:23,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:23,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438718609] [2022-02-10 03:03:23,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438718609] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:23,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448908106] [2022-02-10 03:03:23,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:23,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:23,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:23,754 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) [2022-02-10 03:03:23,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-10 03:03:23,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:03:23,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:23,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:23,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:23,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:23,882 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:03:23,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:23,884 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 31 treesize of output 25 [2022-02-10 03:03:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:23,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:23,967 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:03:23,967 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:03:23,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:03:24,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448908106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:24,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:24,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-02-10 03:03:24,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436152428] [2022-02-10 03:03:24,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:24,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:03:24,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:03:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:03:24,003 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) [2022-02-10 03:03:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:24,257 INFO L93 Difference]: Finished difference Result 280 states and 740 transitions. [2022-02-10 03:03:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:03:24,257 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 [2022-02-10 03:03:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:24,258 INFO L225 Difference]: With dead ends: 280 [2022-02-10 03:03:24,258 INFO L226 Difference]: Without dead ends: 276 [2022-02-10 03:03:24,258 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 [2022-02-10 03:03:24,258 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 [2022-02-10 03:03:24,258 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] [2022-02-10 03:03:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-10 03:03:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2022-02-10 03:03:24,261 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) [2022-02-10 03:03:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 713 transitions. [2022-02-10 03:03:24,261 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 713 transitions. Word has length 15 [2022-02-10 03:03:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:24,261 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 713 transitions. [2022-02-10 03:03:24,261 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) [2022-02-10 03:03:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 713 transitions. [2022-02-10 03:03:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:24,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:24,262 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:24,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-02-10 03:03:24,462 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 [2022-02-10 03:03:24,462 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:24,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1255057863, now seen corresponding path program 142 times [2022-02-10 03:03:24,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:24,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332465500] [2022-02-10 03:03:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:24,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:24,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:24,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332465500] [2022-02-10 03:03:24,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332465500] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:24,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858908450] [2022-02-10 03:03:24,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:24,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:24,544 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) [2022-02-10 03:03:24,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-10 03:03:24,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:24,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:24,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:24,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:24,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:24,660 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 43 treesize of output 35 [2022-02-10 03:03:24,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:24,661 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 35 treesize of output 27 [2022-02-10 03:03:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:24,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:24,795 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:24,795 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:03:24,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:24,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858908450] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:24,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:24,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:03:24,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108166724] [2022-02-10 03:03:24,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:24,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:03:24,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:24,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:03:24,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:03:24,815 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) [2022-02-10 03:03:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:25,056 INFO L93 Difference]: Finished difference Result 335 states and 836 transitions. [2022-02-10 03:03:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:03:25,057 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 [2022-02-10 03:03:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:25,057 INFO L225 Difference]: With dead ends: 335 [2022-02-10 03:03:25,057 INFO L226 Difference]: Without dead ends: 335 [2022-02-10 03:03:25,057 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 [2022-02-10 03:03:25,058 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 [2022-02-10 03:03:25,058 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] [2022-02-10 03:03:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-10 03:03:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 270. [2022-02-10 03:03:25,061 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) [2022-02-10 03:03:25,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 743 transitions. [2022-02-10 03:03:25,061 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 743 transitions. Word has length 15 [2022-02-10 03:03:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:25,061 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 743 transitions. [2022-02-10 03:03:25,061 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) [2022-02-10 03:03:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 743 transitions. [2022-02-10 03:03:25,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:25,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:25,062 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:25,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-02-10 03:03:25,262 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 [2022-02-10 03:03:25,262 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash -453441635, now seen corresponding path program 143 times [2022-02-10 03:03:25,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:25,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796306958] [2022-02-10 03:03:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:25,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:25,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:25,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796306958] [2022-02-10 03:03:25,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796306958] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:25,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401538232] [2022-02-10 03:03:25,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:25,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:25,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:25,333 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) [2022-02-10 03:03:25,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-10 03:03:25,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:03:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:25,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:25,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:25,451 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 [2022-02-10 03:03:25,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:25,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:25,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:25,598 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:25,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:25,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:25,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401538232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:25,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:25,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:03:25,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441895816] [2022-02-10 03:03:25,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:25,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:03:25,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:25,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:03:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:03:25,614 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) [2022-02-10 03:03:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:26,311 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2022-02-10 03:03:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:03:26,312 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 [2022-02-10 03:03:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:26,312 INFO L225 Difference]: With dead ends: 357 [2022-02-10 03:03:26,312 INFO L226 Difference]: Without dead ends: 351 [2022-02-10 03:03:26,313 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 [2022-02-10 03:03:26,313 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 [2022-02-10 03:03:26,313 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] [2022-02-10 03:03:26,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-10 03:03:26,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 282. [2022-02-10 03:03:26,316 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) [2022-02-10 03:03:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 779 transitions. [2022-02-10 03:03:26,316 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 779 transitions. Word has length 15 [2022-02-10 03:03:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:26,316 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 779 transitions. [2022-02-10 03:03:26,316 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) [2022-02-10 03:03:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 779 transitions. [2022-02-10 03:03:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:26,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:26,317 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:26,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-02-10 03:03:26,517 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 [2022-02-10 03:03:26,517 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:26,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1264902071, now seen corresponding path program 144 times [2022-02-10 03:03:26,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:26,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120551836] [2022-02-10 03:03:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:26,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:26,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:26,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120551836] [2022-02-10 03:03:26,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120551836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:26,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715054671] [2022-02-10 03:03:26,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:26,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:26,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:26,596 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) [2022-02-10 03:03:26,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-10 03:03:26,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:03:26,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:26,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:26,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:26,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:26,713 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 43 treesize of output 35 [2022-02-10 03:03:26,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:26,715 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:03:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:26,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:26,868 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:26,868 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:03:26,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:26,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715054671] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:26,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:26,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-10 03:03:26,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970961239] [2022-02-10 03:03:26,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:26,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:03:26,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:26,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:03:26,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:03:26,883 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) [2022-02-10 03:03:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:27,386 INFO L93 Difference]: Finished difference Result 347 states and 860 transitions. [2022-02-10 03:03:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:03:27,386 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 [2022-02-10 03:03:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:27,387 INFO L225 Difference]: With dead ends: 347 [2022-02-10 03:03:27,387 INFO L226 Difference]: Without dead ends: 346 [2022-02-10 03:03:27,387 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 [2022-02-10 03:03:27,387 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 [2022-02-10 03:03:27,387 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] [2022-02-10 03:03:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-10 03:03:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 268. [2022-02-10 03:03:27,390 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) [2022-02-10 03:03:27,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 727 transitions. [2022-02-10 03:03:27,391 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 727 transitions. Word has length 15 [2022-02-10 03:03:27,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:27,391 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 727 transitions. [2022-02-10 03:03:27,391 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) [2022-02-10 03:03:27,391 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 727 transitions. [2022-02-10 03:03:27,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:27,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:27,391 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:27,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:27,592 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 [2022-02-10 03:03:27,592 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:27,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:27,592 INFO L85 PathProgramCache]: Analyzing trace with hash -445711237, now seen corresponding path program 145 times [2022-02-10 03:03:27,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:27,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159208339] [2022-02-10 03:03:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:27,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:27,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:27,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159208339] [2022-02-10 03:03:27,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159208339] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:27,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437936496] [2022-02-10 03:03:27,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:27,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:27,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:27,673 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) [2022-02-10 03:03:27,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-10 03:03:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:27,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:27,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:27,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:27,811 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 29 treesize of output 23 [2022-02-10 03:03:27,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:27,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:27,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:27,817 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 7 treesize of output 1 [2022-02-10 03:03:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:27,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:27,932 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:27,932 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 [2022-02-10 03:03:27,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:27,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437936496] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:27,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:27,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 03:03:27,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857900724] [2022-02-10 03:03:27,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:27,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:03:27,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:27,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:03:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:03:27,947 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) [2022-02-10 03:03:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:28,519 INFO L93 Difference]: Finished difference Result 312 states and 805 transitions. [2022-02-10 03:03:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:03:28,519 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 [2022-02-10 03:03:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:28,520 INFO L225 Difference]: With dead ends: 312 [2022-02-10 03:03:28,520 INFO L226 Difference]: Without dead ends: 312 [2022-02-10 03:03:28,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:03:28,520 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:28,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 24 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:03:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-10 03:03:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 262. [2022-02-10 03:03:28,523 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) [2022-02-10 03:03:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 707 transitions. [2022-02-10 03:03:28,524 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 707 transitions. Word has length 15 [2022-02-10 03:03:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:28,524 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 707 transitions. [2022-02-10 03:03:28,524 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) [2022-02-10 03:03:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 707 transitions. [2022-02-10 03:03:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:03:28,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:28,524 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:28,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:28,724 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 [2022-02-10 03:03:28,725 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:28,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1935116233, now seen corresponding path program 146 times [2022-02-10 03:03:28,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:28,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559438139] [2022-02-10 03:03:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:28,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:28,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:28,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559438139] [2022-02-10 03:03:28,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559438139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:28,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820070314] [2022-02-10 03:03:28,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:28,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:28,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:28,795 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) [2022-02-10 03:03:28,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-10 03:03:28,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:28,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:28,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:03:28,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:28,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:28,933 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 29 treesize of output 23 [2022-02-10 03:03:28,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:28,936 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 8 treesize of output 1 [2022-02-10 03:03:28,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:28,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:28,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:29,039 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:03:29,040 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 30 treesize of output 27 [2022-02-10 03:03:29,045 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 [2022-02-10 03:03:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:29,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820070314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:29,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:29,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 03:03:29,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994000868] [2022-02-10 03:03:29,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:29,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:03:29,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:29,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:03:29,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:03:29,059 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) [2022-02-10 03:03:29,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:29,224 INFO L93 Difference]: Finished difference Result 291 states and 764 transitions. [2022-02-10 03:03:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:03:29,224 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 [2022-02-10 03:03:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:29,225 INFO L225 Difference]: With dead ends: 291 [2022-02-10 03:03:29,225 INFO L226 Difference]: Without dead ends: 291 [2022-02-10 03:03:29,225 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 [2022-02-10 03:03:29,225 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 [2022-02-10 03:03:29,225 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] [2022-02-10 03:03:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-10 03:03:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 263. [2022-02-10 03:03:29,228 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) [2022-02-10 03:03:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 710 transitions. [2022-02-10 03:03:29,228 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 710 transitions. Word has length 15 [2022-02-10 03:03:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:29,228 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 710 transitions. [2022-02-10 03:03:29,229 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) [2022-02-10 03:03:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 710 transitions. [2022-02-10 03:03:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:03:29,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:29,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:29,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:29,429 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 [2022-02-10 03:03:29,429 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:29,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:29,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2026434779, now seen corresponding path program 147 times [2022-02-10 03:03:29,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:29,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068236926] [2022-02-10 03:03:29,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:29,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:29,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:29,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068236926] [2022-02-10 03:03:29,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068236926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:29,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982366073] [2022-02-10 03:03:29,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:29,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:29,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:29,859 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) [2022-02-10 03:03:29,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-10 03:03:29,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:03:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:29,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-10 03:03:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:30,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:30,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:30,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:30,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:30,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:30,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:30,878 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 [2022-02-10 03:03:30,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:30,881 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 75 treesize of output 61 [2022-02-10 03:03:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:30,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:31,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:31,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:31,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:31,971 INFO L353 Elim1Store]: treesize reduction 46, result has 49.5 percent of original size [2022-02-10 03:03:31,971 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 [2022-02-10 03:03:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:31,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:32,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:32,022 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 [2022-02-10 03:03:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:32,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982366073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:32,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:32,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-10 03:03:32,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082574794] [2022-02-10 03:03:32,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:32,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:03:32,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:32,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:03:32,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:03:32,487 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) [2022-02-10 03:03:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:34,767 INFO L93 Difference]: Finished difference Result 430 states and 1095 transitions. [2022-02-10 03:03:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:03:34,768 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 [2022-02-10 03:03:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:34,768 INFO L225 Difference]: With dead ends: 430 [2022-02-10 03:03:34,768 INFO L226 Difference]: Without dead ends: 421 [2022-02-10 03:03:34,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 03:03:34,769 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-02-10 03:03:34,769 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] [2022-02-10 03:03:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-02-10 03:03:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 268. [2022-02-10 03:03:34,772 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) [2022-02-10 03:03:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 721 transitions. [2022-02-10 03:03:34,772 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 721 transitions. Word has length 16 [2022-02-10 03:03:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:34,772 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 721 transitions. [2022-02-10 03:03:34,772 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) [2022-02-10 03:03:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 721 transitions. [2022-02-10 03:03:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:03:34,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:34,773 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:34,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:34,973 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 [2022-02-10 03:03:34,973 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:34,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1098862525, now seen corresponding path program 148 times [2022-02-10 03:03:34,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:34,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408563422] [2022-02-10 03:03:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:34,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:35,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:35,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408563422] [2022-02-10 03:03:35,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408563422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:35,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874222434] [2022-02-10 03:03:35,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:35,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:35,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:35,173 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) [2022-02-10 03:03:35,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-10 03:03:35,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:35,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:35,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:03:35,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:35,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:35,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:35,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:35,699 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 [2022-02-10 03:03:35,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:35,702 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 60 treesize of output 48 [2022-02-10 03:03:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:35,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:36,725 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:03:36,725 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 [2022-02-10 03:03:36,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:36,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:36,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:36,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:36,759 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 [2022-02-10 03:03:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:37,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874222434] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:37,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:37,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:03:37,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054357791] [2022-02-10 03:03:37,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:37,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:03:37,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:03:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:03:37,046 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) [2022-02-10 03:03:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:38,324 INFO L93 Difference]: Finished difference Result 389 states and 974 transitions. [2022-02-10 03:03:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:03:38,325 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 [2022-02-10 03:03:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:38,325 INFO L225 Difference]: With dead ends: 389 [2022-02-10 03:03:38,325 INFO L226 Difference]: Without dead ends: 384 [2022-02-10 03:03:38,325 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 [2022-02-10 03:03:38,326 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 [2022-02-10 03:03:38,326 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] [2022-02-10 03:03:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-02-10 03:03:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 269. [2022-02-10 03:03:38,329 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) [2022-02-10 03:03:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 729 transitions. [2022-02-10 03:03:38,329 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 729 transitions. Word has length 16 [2022-02-10 03:03:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:38,329 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 729 transitions. [2022-02-10 03:03:38,329 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) [2022-02-10 03:03:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 729 transitions. [2022-02-10 03:03:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:03:38,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:38,330 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:38,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:38,530 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 [2022-02-10 03:03:38,530 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:38,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1091132127, now seen corresponding path program 149 times [2022-02-10 03:03:38,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:38,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506594580] [2022-02-10 03:03:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:38,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:38,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:38,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506594580] [2022-02-10 03:03:38,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506594580] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:38,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205190916] [2022-02-10 03:03:38,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:38,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:38,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:38,690 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) [2022-02-10 03:03:38,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-10 03:03:38,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:03:38,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:38,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:03:38,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:39,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:39,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:39,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:39,204 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 [2022-02-10 03:03:39,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:39,206 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:03:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:39,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:40,197 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:03:40,198 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 [2022-02-10 03:03:40,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:40,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:40,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:40,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:40,230 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 [2022-02-10 03:03:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:40,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205190916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:40,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:40,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:03:40,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226067135] [2022-02-10 03:03:40,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:40,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:40,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:40,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:40,652 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) [2022-02-10 03:03:41,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:41,648 INFO L93 Difference]: Finished difference Result 358 states and 910 transitions. [2022-02-10 03:03:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:03:41,648 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 [2022-02-10 03:03:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:41,649 INFO L225 Difference]: With dead ends: 358 [2022-02-10 03:03:41,649 INFO L226 Difference]: Without dead ends: 353 [2022-02-10 03:03:41,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:03:41,649 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 [2022-02-10 03:03:41,649 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] [2022-02-10 03:03:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-10 03:03:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 270. [2022-02-10 03:03:41,655 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) [2022-02-10 03:03:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 734 transitions. [2022-02-10 03:03:41,656 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 734 transitions. Word has length 16 [2022-02-10 03:03:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:41,656 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 734 transitions. [2022-02-10 03:03:41,656 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) [2022-02-10 03:03:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 734 transitions. [2022-02-10 03:03:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:03:41,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:41,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:41,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:41,857 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 [2022-02-10 03:03:41,857 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:41,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:41,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1714430173, now seen corresponding path program 150 times [2022-02-10 03:03:41,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:41,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738799296] [2022-02-10 03:03:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:41,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:42,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:42,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738799296] [2022-02-10 03:03:42,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738799296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:42,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677351987] [2022-02-10 03:03:42,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:42,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:42,298 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) [2022-02-10 03:03:42,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-10 03:03:42,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:03:42,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:42,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:03:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:42,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:42,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:42,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:42,860 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:03:42,860 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 [2022-02-10 03:03:42,865 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:03:42,865 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-10 03:03:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:42,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:43,903 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:03:43,903 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 [2022-02-10 03:03:43,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:43,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:43,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:43,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:43,936 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 [2022-02-10 03:03:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:44,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677351987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:44,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:44,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-10 03:03:44,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186239230] [2022-02-10 03:03:44,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:44,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:03:44,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:44,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:03:44,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:03:44,237 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) [2022-02-10 03:03:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:46,297 INFO L93 Difference]: Finished difference Result 352 states and 909 transitions. [2022-02-10 03:03:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:03:46,297 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 [2022-02-10 03:03:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:46,298 INFO L225 Difference]: With dead ends: 352 [2022-02-10 03:03:46,298 INFO L226 Difference]: Without dead ends: 340 [2022-02-10 03:03:46,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:03:46,298 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:46,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 692 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2022-02-10 03:03:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-10 03:03:46,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 274. [2022-02-10 03:03:46,301 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) [2022-02-10 03:03:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 745 transitions. [2022-02-10 03:03:46,302 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 745 transitions. Word has length 16 [2022-02-10 03:03:46,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:46,302 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 745 transitions. [2022-02-10 03:03:46,302 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) [2022-02-10 03:03:46,302 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 745 transitions. [2022-02-10 03:03:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:03:46,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:46,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:46,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-02-10 03:03:46,512 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 [2022-02-10 03:03:46,512 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash 756031397, now seen corresponding path program 151 times [2022-02-10 03:03:46,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:46,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744901083] [2022-02-10 03:03:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:46,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:46,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:46,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744901083] [2022-02-10 03:03:46,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744901083] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:46,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982843862] [2022-02-10 03:03:46,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:46,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:46,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:46,805 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) [2022-02-10 03:03:46,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-10 03:03:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:46,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:03:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:47,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:47,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:47,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:47,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:47,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:47,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:47,347 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 [2022-02-10 03:03:47,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:47,349 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 58 treesize of output 46 [2022-02-10 03:03:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:47,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:48,334 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:03:48,335 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 [2022-02-10 03:03:48,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:48,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:48,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:48,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:48,368 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 [2022-02-10 03:03:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:48,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982843862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:48,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:48,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:03:48,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244344854] [2022-02-10 03:03:48,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:48,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:48,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:48,688 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) [2022-02-10 03:03:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:49,567 INFO L93 Difference]: Finished difference Result 359 states and 922 transitions. [2022-02-10 03:03:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:03:49,567 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 [2022-02-10 03:03:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:49,568 INFO L225 Difference]: With dead ends: 359 [2022-02-10 03:03:49,568 INFO L226 Difference]: Without dead ends: 352 [2022-02-10 03:03:49,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:03:49,568 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:03:49,568 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] [2022-02-10 03:03:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-10 03:03:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 274. [2022-02-10 03:03:49,571 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) [2022-02-10 03:03:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 745 transitions. [2022-02-10 03:03:49,571 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 745 transitions. Word has length 16 [2022-02-10 03:03:49,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:49,571 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 745 transitions. [2022-02-10 03:03:49,571 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) [2022-02-10 03:03:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 745 transitions. [2022-02-10 03:03:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:03:49,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:49,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:49,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-02-10 03:03:49,772 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 [2022-02-10 03:03:49,772 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1507451743, now seen corresponding path program 152 times [2022-02-10 03:03:49,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:49,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458543836] [2022-02-10 03:03:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:49,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:49,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:49,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458543836] [2022-02-10 03:03:49,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458543836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:49,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063015379] [2022-02-10 03:03:49,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:49,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:49,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:49,982 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) [2022-02-10 03:03:49,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-10 03:03:50,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:50,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:50,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:03:50,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:50,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:50,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:50,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:50,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:50,502 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 [2022-02-10 03:03:50,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:50,504 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 58 treesize of output 46 [2022-02-10 03:03:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:50,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:51,391 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:03:51,392 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 [2022-02-10 03:03:51,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:51,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:51,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:51,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:51,425 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 [2022-02-10 03:03:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:51,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063015379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:51,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:51,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-10 03:03:51,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938860555] [2022-02-10 03:03:51,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:51,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:03:51,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:51,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:03:51,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:03:51,929 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) [2022-02-10 03:03:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:52,796 INFO L93 Difference]: Finished difference Result 371 states and 945 transitions. [2022-02-10 03:03:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:03:52,797 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 [2022-02-10 03:03:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:52,797 INFO L225 Difference]: With dead ends: 371 [2022-02-10 03:03:52,797 INFO L226 Difference]: Without dead ends: 365 [2022-02-10 03:03:52,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:03:52,798 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:52,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 49 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 672 Invalid, 0 Unknown, 200 Unchecked, 0.3s Time] [2022-02-10 03:03:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-10 03:03:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 281. [2022-02-10 03:03:52,800 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) [2022-02-10 03:03:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 765 transitions. [2022-02-10 03:03:52,801 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 765 transitions. Word has length 16 [2022-02-10 03:03:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:52,801 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 765 transitions. [2022-02-10 03:03:52,801 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) [2022-02-10 03:03:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 765 transitions. [2022-02-10 03:03:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:03:52,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:52,801 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:52,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-02-10 03:03:53,002 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 [2022-02-10 03:03:53,002 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2107457183, now seen corresponding path program 153 times [2022-02-10 03:03:53,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:53,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607203074] [2022-02-10 03:03:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:53,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:53,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:53,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607203074] [2022-02-10 03:03:53,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607203074] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:53,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645894667] [2022-02-10 03:03:53,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:53,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:53,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:53,081 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) [2022-02-10 03:03:53,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-10 03:03:53,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:03:53,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:53,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:03:53,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:53,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:53,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:03:53,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:53,249 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:03:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:53,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:53,407 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:03:53,408 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:03:53,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:53,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645894667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:53,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:53,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:03:53,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532250661] [2022-02-10 03:03:53,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:53,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:03:53,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:53,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:03:53,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:03:53,419 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) [2022-02-10 03:03:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:53,676 INFO L93 Difference]: Finished difference Result 361 states and 944 transitions. [2022-02-10 03:03:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:03:53,676 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 [2022-02-10 03:03:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:53,677 INFO L225 Difference]: With dead ends: 361 [2022-02-10 03:03:53,677 INFO L226 Difference]: Without dead ends: 361 [2022-02-10 03:03:53,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:03:53,677 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 [2022-02-10 03:03:53,677 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] [2022-02-10 03:03:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-10 03:03:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 282. [2022-02-10 03:03:53,680 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) [2022-02-10 03:03:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 768 transitions. [2022-02-10 03:03:53,680 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 768 transitions. Word has length 16 [2022-02-10 03:03:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:53,680 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 768 transitions. [2022-02-10 03:03:53,680 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) [2022-02-10 03:03:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 768 transitions. [2022-02-10 03:03:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:03:53,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:53,681 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:53,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-02-10 03:03:53,881 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 [2022-02-10 03:03:53,881 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1149058407, now seen corresponding path program 154 times [2022-02-10 03:03:53,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:53,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412655805] [2022-02-10 03:03:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:53,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:53,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:53,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412655805] [2022-02-10 03:03:53,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412655805] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:53,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984316549] [2022-02-10 03:03:53,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:53,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:53,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:53,961 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) [2022-02-10 03:03:53,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-10 03:03:53,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:53,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:53,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:03:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:54,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:54,128 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 29 treesize of output 23 [2022-02-10 03:03:54,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:54,131 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 21 treesize of output 2 [2022-02-10 03:03:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:54,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:54,306 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:03:54,306 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:03:54,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:03:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:54,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984316549] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:54,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:54,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:03:54,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54976362] [2022-02-10 03:03:54,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:54,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:03:54,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:03:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:03:54,318 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) [2022-02-10 03:03:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:54,632 INFO L93 Difference]: Finished difference Result 362 states and 939 transitions. [2022-02-10 03:03:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:03:54,632 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 [2022-02-10 03:03:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:54,632 INFO L225 Difference]: With dead ends: 362 [2022-02-10 03:03:54,632 INFO L226 Difference]: Without dead ends: 362 [2022-02-10 03:03:54,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:03:54,633 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:54,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 447 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-02-10 03:03:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-10 03:03:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 281. [2022-02-10 03:03:54,636 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) [2022-02-10 03:03:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 765 transitions. [2022-02-10 03:03:54,636 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 765 transitions. Word has length 16 [2022-02-10 03:03:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:54,637 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 765 transitions. [2022-02-10 03:03:54,637 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) [2022-02-10 03:03:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 765 transitions. [2022-02-10 03:03:54,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:03:54,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:54,637 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:54,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-02-10 03:03:54,837 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 [2022-02-10 03:03:54,838 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:54,838 INFO L85 PathProgramCache]: Analyzing trace with hash 608535423, now seen corresponding path program 155 times [2022-02-10 03:03:54,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:54,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675485939] [2022-02-10 03:03:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:54,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:55,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:55,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675485939] [2022-02-10 03:03:55,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675485939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:55,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11428176] [2022-02-10 03:03:55,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:55,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:55,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:55,056 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) [2022-02-10 03:03:55,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-10 03:03:55,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:03:55,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:55,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:03:55,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:55,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:03:55,538 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 [2022-02-10 03:03:55,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:55,540 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 60 treesize of output 48 [2022-02-10 03:03:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:55,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:56,506 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:03:56,507 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 [2022-02-10 03:03:56,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:56,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:56,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:56,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:56,540 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 [2022-02-10 03:03:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:03:56,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11428176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:56,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:56,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:03:56,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820366520] [2022-02-10 03:03:56,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:56,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:03:56,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:56,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:03:56,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:03:56,943 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) [2022-02-10 03:03:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:59,599 INFO L93 Difference]: Finished difference Result 392 states and 976 transitions. [2022-02-10 03:03:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:03:59,600 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 [2022-02-10 03:03:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:59,600 INFO L225 Difference]: With dead ends: 392 [2022-02-10 03:03:59,600 INFO L226 Difference]: Without dead ends: 383 [2022-02-10 03:03:59,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=260, Invalid=1720, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:03:59,601 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 [2022-02-10 03:03:59,601 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] [2022-02-10 03:03:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-10 03:03:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 299. [2022-02-10 03:03:59,604 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) [2022-02-10 03:03:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 820 transitions. [2022-02-10 03:03:59,604 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 820 transitions. Word has length 16 [2022-02-10 03:03:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:59,604 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 820 transitions. [2022-02-10 03:03:59,604 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) [2022-02-10 03:03:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 820 transitions. [2022-02-10 03:03:59,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:03:59,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:59,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:59,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-02-10 03:03:59,805 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 [2022-02-10 03:03:59,806 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:03:59,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:59,806 INFO L85 PathProgramCache]: Analyzing trace with hash 855908159, now seen corresponding path program 156 times [2022-02-10 03:03:59,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:59,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274554617] [2022-02-10 03:03:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:59,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:00,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:00,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274554617] [2022-02-10 03:04:00,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274554617] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:00,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745164740] [2022-02-10 03:04:00,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:04:00,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:00,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:00,108 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) [2022-02-10 03:04:00,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-10 03:04:00,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:04:00,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:00,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:00,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:00,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:00,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:00,713 INFO L353 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-02-10 03:04:00,713 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 [2022-02-10 03:04:00,719 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:00,719 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-10 03:04:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:00,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:01,788 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:04:01,788 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 [2022-02-10 03:04:01,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:01,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:01,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:01,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:01,821 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 [2022-02-10 03:04:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:02,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745164740] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:02,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:02,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:04:02,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401676898] [2022-02-10 03:04:02,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:02,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:02,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:02,293 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) [2022-02-10 03:04:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:03,871 INFO L93 Difference]: Finished difference Result 423 states and 1113 transitions. [2022-02-10 03:04:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:04:03,872 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 [2022-02-10 03:04:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:03,872 INFO L225 Difference]: With dead ends: 423 [2022-02-10 03:04:03,872 INFO L226 Difference]: Without dead ends: 413 [2022-02-10 03:04:03,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=1344, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 03:04:03,873 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-10 03:04:03,873 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] [2022-02-10 03:04:03,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-02-10 03:04:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 328. [2022-02-10 03:04:03,876 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) [2022-02-10 03:04:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 921 transitions. [2022-02-10 03:04:03,877 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 921 transitions. Word has length 16 [2022-02-10 03:04:03,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:03,877 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 921 transitions. [2022-02-10 03:04:03,877 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) [2022-02-10 03:04:03,877 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 921 transitions. [2022-02-10 03:04:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:03,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:03,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:03,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-02-10 03:04:04,078 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 [2022-02-10 03:04:04,078 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:04,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:04,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1831537951, now seen corresponding path program 157 times [2022-02-10 03:04:04,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:04,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516437706] [2022-02-10 03:04:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:04,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:04,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:04,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516437706] [2022-02-10 03:04:04,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516437706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:04,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332477048] [2022-02-10 03:04:04,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:04:04,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:04,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:04,271 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) [2022-02-10 03:04:04,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-10 03:04:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:04,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:04,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:04,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:04,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:04,876 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 [2022-02-10 03:04:04,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:04,878 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:04:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:04,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:05,902 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:04:05,902 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 [2022-02-10 03:04:05,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:05,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:05,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:05,937 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 [2022-02-10 03:04:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:06,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332477048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:06,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:06,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:04:06,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732237249] [2022-02-10 03:04:06,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:06,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:06,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:06,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:06,353 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) [2022-02-10 03:04:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:07,210 INFO L93 Difference]: Finished difference Result 400 states and 1067 transitions. [2022-02-10 03:04:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:04:07,211 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 [2022-02-10 03:04:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:07,211 INFO L225 Difference]: With dead ends: 400 [2022-02-10 03:04:07,211 INFO L226 Difference]: Without dead ends: 393 [2022-02-10 03:04:07,211 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 [2022-02-10 03:04:07,212 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-10 03:04:07,212 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] [2022-02-10 03:04:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-02-10 03:04:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 284. [2022-02-10 03:04:07,215 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) [2022-02-10 03:04:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 771 transitions. [2022-02-10 03:04:07,215 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 771 transitions. Word has length 16 [2022-02-10 03:04:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:07,215 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 771 transitions. [2022-02-10 03:04:07,215 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) [2022-02-10 03:04:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 771 transitions. [2022-02-10 03:04:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:07,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:07,216 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:07,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-02-10 03:04:07,416 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 [2022-02-10 03:04:07,416 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash 439588543, now seen corresponding path program 158 times [2022-02-10 03:04:07,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:07,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683373023] [2022-02-10 03:04:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:07,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:07,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:07,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683373023] [2022-02-10 03:04:07,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683373023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:07,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950326616] [2022-02-10 03:04:07,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:04:07,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:07,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:07,697 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) [2022-02-10 03:04:07,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-10 03:04:07,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:04:07,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:07,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:07,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:08,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:08,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:08,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:08,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:08,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:08,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:08,253 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 [2022-02-10 03:04:08,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:08,255 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 [2022-02-10 03:04:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:08,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:09,240 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:04:09,241 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 [2022-02-10 03:04:09,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:09,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:09,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:09,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:09,274 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 [2022-02-10 03:04:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:09,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950326616] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:09,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:09,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:04:09,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048044037] [2022-02-10 03:04:09,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:09,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:04:09,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:09,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:04:09,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:09,677 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) [2022-02-10 03:04:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:11,188 INFO L93 Difference]: Finished difference Result 387 states and 982 transitions. [2022-02-10 03:04:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:04:11,188 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 [2022-02-10 03:04:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:11,189 INFO L225 Difference]: With dead ends: 387 [2022-02-10 03:04:11,189 INFO L226 Difference]: Without dead ends: 380 [2022-02-10 03:04:11,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:04:11,189 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 [2022-02-10 03:04:11,189 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] [2022-02-10 03:04:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-10 03:04:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 297. [2022-02-10 03:04:11,192 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) [2022-02-10 03:04:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 814 transitions. [2022-02-10 03:04:11,192 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 814 transitions. Word has length 16 [2022-02-10 03:04:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:11,192 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 814 transitions. [2022-02-10 03:04:11,193 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) [2022-02-10 03:04:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 814 transitions. [2022-02-10 03:04:11,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:11,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:11,193 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:11,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:11,407 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 [2022-02-10 03:04:11,407 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash 827171553, now seen corresponding path program 159 times [2022-02-10 03:04:11,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:11,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126738460] [2022-02-10 03:04:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:11,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:11,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:11,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126738460] [2022-02-10 03:04:11,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126738460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:11,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125604373] [2022-02-10 03:04:11,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:04:11,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:11,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:11,736 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) [2022-02-10 03:04:11,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-10 03:04:11,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:04:11,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:11,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:11,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:12,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:12,296 INFO L353 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-02-10 03:04:12,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-10 03:04:12,302 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:12,302 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 64 treesize of output 55 [2022-02-10 03:04:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:12,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:13,356 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:04:13,357 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 [2022-02-10 03:04:13,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:13,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:13,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:13,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:13,390 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 [2022-02-10 03:04:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:13,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125604373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:13,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:13,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-10 03:04:13,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161669922] [2022-02-10 03:04:13,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:13,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:04:13,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:13,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:04:13,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:04:13,867 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) [2022-02-10 03:04:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:15,813 INFO L93 Difference]: Finished difference Result 451 states and 1130 transitions. [2022-02-10 03:04:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:04:15,814 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 [2022-02-10 03:04:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:15,814 INFO L225 Difference]: With dead ends: 451 [2022-02-10 03:04:15,814 INFO L226 Difference]: Without dead ends: 445 [2022-02-10 03:04:15,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:04:15,815 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 [2022-02-10 03:04:15,815 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] [2022-02-10 03:04:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-02-10 03:04:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 324. [2022-02-10 03:04:15,819 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) [2022-02-10 03:04:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 902 transitions. [2022-02-10 03:04:15,819 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 902 transitions. Word has length 16 [2022-02-10 03:04:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:15,819 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 902 transitions. [2022-02-10 03:04:15,819 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) [2022-02-10 03:04:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 902 transitions. [2022-02-10 03:04:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:15,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:15,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:15,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-02-10 03:04:16,034 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 [2022-02-10 03:04:16,034 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:16,035 INFO L85 PathProgramCache]: Analyzing trace with hash 834901951, now seen corresponding path program 160 times [2022-02-10 03:04:16,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:16,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699020924] [2022-02-10 03:04:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:16,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:16,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:16,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699020924] [2022-02-10 03:04:16,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699020924] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:16,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451727138] [2022-02-10 03:04:16,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:04:16,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:16,199 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) [2022-02-10 03:04:16,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-10 03:04:16,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:04:16,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:16,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:16,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:16,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:16,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:16,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:16,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:16,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:16,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-10 03:04:16,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:16,724 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 58 treesize of output 46 [2022-02-10 03:04:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:16,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:17,724 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:04:17,724 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 [2022-02-10 03:04:17,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:17,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:17,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:17,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:17,756 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 [2022-02-10 03:04:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:18,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451727138] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:18,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:18,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:04:18,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901095744] [2022-02-10 03:04:18,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:18,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:18,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:18,059 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) [2022-02-10 03:04:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:18,795 INFO L93 Difference]: Finished difference Result 380 states and 1004 transitions. [2022-02-10 03:04:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:04:18,795 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 [2022-02-10 03:04:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:18,796 INFO L225 Difference]: With dead ends: 380 [2022-02-10 03:04:18,796 INFO L226 Difference]: Without dead ends: 376 [2022-02-10 03:04:18,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:04:18,796 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 [2022-02-10 03:04:18,796 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] [2022-02-10 03:04:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-02-10 03:04:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 327. [2022-02-10 03:04:18,799 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) [2022-02-10 03:04:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 912 transitions. [2022-02-10 03:04:18,800 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 912 transitions. Word has length 16 [2022-02-10 03:04:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:18,800 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 912 transitions. [2022-02-10 03:04:18,800 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) [2022-02-10 03:04:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 912 transitions. [2022-02-10 03:04:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:18,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:18,801 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:18,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-02-10 03:04:19,001 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 [2022-02-10 03:04:19,001 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:19,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:19,001 INFO L85 PathProgramCache]: Analyzing trace with hash 418582335, now seen corresponding path program 161 times [2022-02-10 03:04:19,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:19,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499776445] [2022-02-10 03:04:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:19,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:19,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:19,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499776445] [2022-02-10 03:04:19,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499776445] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:19,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31828229] [2022-02-10 03:04:19,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:04:19,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:19,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:19,334 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) [2022-02-10 03:04:19,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-10 03:04:19,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:04:19,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:19,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:19,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:19,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:19,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:19,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:19,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:19,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:19,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:19,836 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 [2022-02-10 03:04:19,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:19,838 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 58 treesize of output 46 [2022-02-10 03:04:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:19,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:20,769 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:04:20,770 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 [2022-02-10 03:04:20,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:20,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:20,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:20,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:20,814 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 [2022-02-10 03:04:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:21,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31828229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:21,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:21,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:04:21,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220268146] [2022-02-10 03:04:21,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:21,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:21,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:21,217 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) [2022-02-10 03:04:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:22,217 INFO L93 Difference]: Finished difference Result 407 states and 1070 transitions. [2022-02-10 03:04:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:04:22,218 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 [2022-02-10 03:04:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:22,218 INFO L225 Difference]: With dead ends: 407 [2022-02-10 03:04:22,218 INFO L226 Difference]: Without dead ends: 401 [2022-02-10 03:04:22,219 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 [2022-02-10 03:04:22,219 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 [2022-02-10 03:04:22,219 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] [2022-02-10 03:04:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-10 03:04:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 337. [2022-02-10 03:04:22,222 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) [2022-02-10 03:04:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 944 transitions. [2022-02-10 03:04:22,223 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 944 transitions. Word has length 16 [2022-02-10 03:04:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:22,223 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 944 transitions. [2022-02-10 03:04:22,223 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) [2022-02-10 03:04:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 944 transitions. [2022-02-10 03:04:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:22,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:22,223 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:22,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-02-10 03:04:22,423 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 [2022-02-10 03:04:22,424 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash -539816441, now seen corresponding path program 162 times [2022-02-10 03:04:22,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:22,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372119465] [2022-02-10 03:04:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:22,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:22,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:22,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372119465] [2022-02-10 03:04:22,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372119465] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:22,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890337017] [2022-02-10 03:04:22,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:04:22,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:22,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:22,620 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) [2022-02-10 03:04:22,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-10 03:04:22,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:04:22,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:22,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:22,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:23,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:23,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:23,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:23,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:23,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:23,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:23,153 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 [2022-02-10 03:04:23,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:23,156 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 58 treesize of output 46 [2022-02-10 03:04:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:23,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:24,066 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:04:24,066 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 [2022-02-10 03:04:24,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:24,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:24,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:24,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:24,099 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 [2022-02-10 03:04:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:24,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890337017] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:24,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:24,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:04:24,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729010571] [2022-02-10 03:04:24,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:24,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:04:24,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:24,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:04:24,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:24,534 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) [2022-02-10 03:04:25,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:25,190 INFO L93 Difference]: Finished difference Result 405 states and 1061 transitions. [2022-02-10 03:04:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:04:25,190 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 [2022-02-10 03:04:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:25,191 INFO L225 Difference]: With dead ends: 405 [2022-02-10 03:04:25,191 INFO L226 Difference]: Without dead ends: 399 [2022-02-10 03:04:25,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:04:25,191 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:04:25,191 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] [2022-02-10 03:04:25,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-10 03:04:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 336. [2022-02-10 03:04:25,195 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) [2022-02-10 03:04:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 941 transitions. [2022-02-10 03:04:25,195 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 941 transitions. Word has length 16 [2022-02-10 03:04:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:25,195 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 941 transitions. [2022-02-10 03:04:25,195 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) [2022-02-10 03:04:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 941 transitions. [2022-02-10 03:04:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:25,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:25,196 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:25,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-02-10 03:04:25,396 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 [2022-02-10 03:04:25,396 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash -261476035, now seen corresponding path program 163 times [2022-02-10 03:04:25,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:25,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039992669] [2022-02-10 03:04:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:25,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:25,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:25,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039992669] [2022-02-10 03:04:25,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039992669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:25,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045271535] [2022-02-10 03:04:25,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:04:25,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:25,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:25,473 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) [2022-02-10 03:04:25,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-10 03:04:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:25,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:04:25,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:25,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:25,644 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 29 treesize of output 23 [2022-02-10 03:04:25,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:25,647 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 21 treesize of output 2 [2022-02-10 03:04:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:25,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:25,798 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:04:25,798 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:04:25,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:04:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:25,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045271535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:25,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:25,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:04:25,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135426942] [2022-02-10 03:04:25,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:25,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:04:25,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:25,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:04:25,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:04:25,813 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) [2022-02-10 03:04:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:26,039 INFO L93 Difference]: Finished difference Result 397 states and 1068 transitions. [2022-02-10 03:04:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:04:26,039 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 [2022-02-10 03:04:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:26,040 INFO L225 Difference]: With dead ends: 397 [2022-02-10 03:04:26,040 INFO L226 Difference]: Without dead ends: 397 [2022-02-10 03:04:26,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:26,040 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 [2022-02-10 03:04:26,040 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] [2022-02-10 03:04:26,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-02-10 03:04:26,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 337. [2022-02-10 03:04:26,043 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) [2022-02-10 03:04:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 943 transitions. [2022-02-10 03:04:26,044 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 943 transitions. Word has length 16 [2022-02-10 03:04:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:26,044 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 943 transitions. [2022-02-10 03:04:26,044 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) [2022-02-10 03:04:26,044 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 943 transitions. [2022-02-10 03:04:26,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:26,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:26,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:26,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-02-10 03:04:26,245 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 [2022-02-10 03:04:26,245 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:26,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1998264259, now seen corresponding path program 164 times [2022-02-10 03:04:26,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:26,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918814729] [2022-02-10 03:04:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:26,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:26,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:26,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918814729] [2022-02-10 03:04:26,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918814729] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:26,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259401757] [2022-02-10 03:04:26,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:04:26,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:26,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:26,464 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) [2022-02-10 03:04:26,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-10 03:04:26,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:04:26,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:26,488 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-10 03:04:26,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:27,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:27,051 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 [2022-02-10 03:04:27,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,053 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 58 treesize of output 46 [2022-02-10 03:04:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:27,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:27,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,928 INFO L353 Elim1Store]: treesize reduction 96, result has 33.8 percent of original size [2022-02-10 03:04:27,928 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 [2022-02-10 03:04:27,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:27,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:27,965 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 [2022-02-10 03:04:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:28,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259401757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:28,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:28,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-10 03:04:28,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248398264] [2022-02-10 03:04:28,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:28,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:04:28,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:04:28,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:04:28,627 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) [2022-02-10 03:04:31,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:31,930 INFO L93 Difference]: Finished difference Result 471 states and 1152 transitions. [2022-02-10 03:04:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:04:31,930 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 [2022-02-10 03:04:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:31,931 INFO L225 Difference]: With dead ends: 471 [2022-02-10 03:04:31,931 INFO L226 Difference]: Without dead ends: 451 [2022-02-10 03:04:31,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=323, Invalid=2227, Unknown=0, NotChecked=0, Total=2550 [2022-02-10 03:04:31,931 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:31,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 88 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 03:04:31,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-02-10 03:04:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 352. [2022-02-10 03:04:31,935 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) [2022-02-10 03:04:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 983 transitions. [2022-02-10 03:04:31,936 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 983 transitions. Word has length 16 [2022-02-10 03:04:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:31,936 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 983 transitions. [2022-02-10 03:04:31,936 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) [2022-02-10 03:04:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 983 transitions. [2022-02-10 03:04:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:31,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:31,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:31,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-02-10 03:04:32,152 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 [2022-02-10 03:04:32,153 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1084614881, now seen corresponding path program 165 times [2022-02-10 03:04:32,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:32,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833199915] [2022-02-10 03:04:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:32,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:32,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:32,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833199915] [2022-02-10 03:04:32,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833199915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:32,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169342816] [2022-02-10 03:04:32,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:04:32,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:32,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:32,316 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) [2022-02-10 03:04:32,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-10 03:04:32,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:04:32,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:32,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:32,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:32,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:32,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:32,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:32,797 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 [2022-02-10 03:04:32,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:32,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:04:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:32,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:33,642 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-10 03:04:33,642 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 [2022-02-10 03:04:33,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:33,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:33,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:33,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:33,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:33,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:33,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:33,678 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 [2022-02-10 03:04:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:34,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169342816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:34,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:34,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:04:34,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669412424] [2022-02-10 03:04:34,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:34,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:34,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:34,167 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) [2022-02-10 03:04:35,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:35,181 INFO L93 Difference]: Finished difference Result 491 states and 1281 transitions. [2022-02-10 03:04:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:04:35,181 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 [2022-02-10 03:04:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:35,182 INFO L225 Difference]: With dead ends: 491 [2022-02-10 03:04:35,182 INFO L226 Difference]: Without dead ends: 485 [2022-02-10 03:04:35,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:04:35,182 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 [2022-02-10 03:04:35,182 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] [2022-02-10 03:04:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-10 03:04:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 393. [2022-02-10 03:04:35,187 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) [2022-02-10 03:04:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1118 transitions. [2022-02-10 03:04:35,188 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1118 transitions. Word has length 16 [2022-02-10 03:04:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:35,188 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1118 transitions. [2022-02-10 03:04:35,188 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) [2022-02-10 03:04:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1118 transitions. [2022-02-10 03:04:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:35,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:35,188 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:35,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:35,404 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 [2022-02-10 03:04:35,404 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:35,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1602831229, now seen corresponding path program 166 times [2022-02-10 03:04:35,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:35,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611440327] [2022-02-10 03:04:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:35,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:35,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:35,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611440327] [2022-02-10 03:04:35,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611440327] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:35,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683335237] [2022-02-10 03:04:35,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:04:35,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:35,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:35,687 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) [2022-02-10 03:04:35,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-10 03:04:35,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:04:35,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:35,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:36,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:36,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:36,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:36,238 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 [2022-02-10 03:04:36,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:36,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:04:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:36,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:37,194 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-10 03:04:37,194 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 [2022-02-10 03:04:37,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:37,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:37,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:37,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:37,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:37,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:37,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:37,231 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 [2022-02-10 03:04:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:37,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683335237] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:37,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:37,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:04:37,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476414476] [2022-02-10 03:04:37,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:37,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:37,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:37,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:37,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:37,737 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) [2022-02-10 03:04:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:39,267 INFO L93 Difference]: Finished difference Result 535 states and 1401 transitions. [2022-02-10 03:04:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:04:39,267 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 [2022-02-10 03:04:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:39,268 INFO L225 Difference]: With dead ends: 535 [2022-02-10 03:04:39,268 INFO L226 Difference]: Without dead ends: 526 [2022-02-10 03:04:39,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:04:39,269 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 69 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-02-10 03:04:39,269 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] [2022-02-10 03:04:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-02-10 03:04:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 416. [2022-02-10 03:04:39,273 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) [2022-02-10 03:04:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1202 transitions. [2022-02-10 03:04:39,274 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1202 transitions. Word has length 16 [2022-02-10 03:04:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:39,274 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1202 transitions. [2022-02-10 03:04:39,274 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) [2022-02-10 03:04:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1202 transitions. [2022-02-10 03:04:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:39,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:39,275 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:39,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-02-10 03:04:39,475 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 [2022-02-10 03:04:39,475 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:39,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:39,475 INFO L85 PathProgramCache]: Analyzing trace with hash -425796323, now seen corresponding path program 167 times [2022-02-10 03:04:39,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:39,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986443091] [2022-02-10 03:04:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:39,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:39,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:39,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986443091] [2022-02-10 03:04:39,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986443091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:39,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236133358] [2022-02-10 03:04:39,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:04:39,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:39,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:39,890 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) [2022-02-10 03:04:39,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-10 03:04:39,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:04:39,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:39,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:39,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:40,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:40,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:40,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:40,425 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 [2022-02-10 03:04:40,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:40,427 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 60 treesize of output 48 [2022-02-10 03:04:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:40,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:41,287 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-10 03:04:41,288 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 [2022-02-10 03:04:41,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:41,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:41,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:41,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:41,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:41,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:41,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:41,326 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 [2022-02-10 03:04:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:41,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236133358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:41,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:41,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-10 03:04:41,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827834626] [2022-02-10 03:04:41,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:41,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:04:41,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:41,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:04:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:41,900 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) [2022-02-10 03:04:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:44,846 INFO L93 Difference]: Finished difference Result 581 states and 1524 transitions. [2022-02-10 03:04:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:04:44,846 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 [2022-02-10 03:04:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:44,847 INFO L225 Difference]: With dead ends: 581 [2022-02-10 03:04:44,847 INFO L226 Difference]: Without dead ends: 571 [2022-02-10 03:04:44,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=249, Invalid=1821, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:04:44,847 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:44,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 90 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 856 Invalid, 0 Unknown, 119 Unchecked, 0.5s Time] [2022-02-10 03:04:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-02-10 03:04:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 452. [2022-02-10 03:04:44,852 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) [2022-02-10 03:04:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1331 transitions. [2022-02-10 03:04:44,853 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1331 transitions. Word has length 16 [2022-02-10 03:04:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:44,853 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1331 transitions. [2022-02-10 03:04:44,853 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) [2022-02-10 03:04:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1331 transitions. [2022-02-10 03:04:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:44,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:44,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:44,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-02-10 03:04:45,054 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 [2022-02-10 03:04:45,054 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:45,054 INFO L85 PathProgramCache]: Analyzing trace with hash 186049697, now seen corresponding path program 168 times [2022-02-10 03:04:45,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:45,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332666854] [2022-02-10 03:04:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:45,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:45,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:45,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332666854] [2022-02-10 03:04:45,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332666854] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:45,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316694425] [2022-02-10 03:04:45,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:04:45,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:45,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:45,267 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) [2022-02-10 03:04:45,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-10 03:04:45,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:04:45,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:45,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:45,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:45,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:45,729 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 [2022-02-10 03:04:45,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:45,731 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 60 treesize of output 48 [2022-02-10 03:04:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:45,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:46,540 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-10 03:04:46,541 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 [2022-02-10 03:04:46,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:46,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:46,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:46,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:46,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:46,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:46,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:46,577 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 [2022-02-10 03:04:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:47,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316694425] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:47,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:47,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:04:47,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799452003] [2022-02-10 03:04:47,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:47,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:47,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:47,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:47,047 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) [2022-02-10 03:04:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:48,854 INFO L93 Difference]: Finished difference Result 580 states and 1598 transitions. [2022-02-10 03:04:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:04:48,854 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 [2022-02-10 03:04:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:48,855 INFO L225 Difference]: With dead ends: 580 [2022-02-10 03:04:48,855 INFO L226 Difference]: Without dead ends: 574 [2022-02-10 03:04:48,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:04:48,856 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 96 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-02-10 03:04:48,856 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] [2022-02-10 03:04:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-02-10 03:04:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 486. [2022-02-10 03:04:48,861 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) [2022-02-10 03:04:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1450 transitions. [2022-02-10 03:04:48,861 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1450 transitions. Word has length 16 [2022-02-10 03:04:48,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:48,861 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1450 transitions. [2022-02-10 03:04:48,861 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) [2022-02-10 03:04:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1450 transitions. [2022-02-10 03:04:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:48,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:48,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:48,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-02-10 03:04:49,062 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 [2022-02-10 03:04:49,063 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:49,063 INFO L85 PathProgramCache]: Analyzing trace with hash -3903391, now seen corresponding path program 169 times [2022-02-10 03:04:49,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:49,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236122376] [2022-02-10 03:04:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:49,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:49,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:49,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236122376] [2022-02-10 03:04:49,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236122376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:49,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021945284] [2022-02-10 03:04:49,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:04:49,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:49,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:49,233 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) [2022-02-10 03:04:49,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-10 03:04:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:49,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:49,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:49,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:49,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:49,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:49,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:49,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:49,699 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 [2022-02-10 03:04:49,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:49,701 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:04:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:49,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:50,456 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-10 03:04:50,457 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 [2022-02-10 03:04:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:50,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:50,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:50,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:50,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:50,493 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 [2022-02-10 03:04:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:51,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021945284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:51,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:51,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:04:51,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254105191] [2022-02-10 03:04:51,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:51,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:51,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:51,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:51,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:51,179 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) [2022-02-10 03:04:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:52,234 INFO L93 Difference]: Finished difference Result 619 states and 1694 transitions. [2022-02-10 03:04:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:04:52,234 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 [2022-02-10 03:04:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:52,235 INFO L225 Difference]: With dead ends: 619 [2022-02-10 03:04:52,235 INFO L226 Difference]: Without dead ends: 611 [2022-02-10 03:04:52,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:04:52,236 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:52,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 67 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 524 Invalid, 0 Unknown, 228 Unchecked, 0.3s Time] [2022-02-10 03:04:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-10 03:04:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 503. [2022-02-10 03:04:52,243 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) [2022-02-10 03:04:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1503 transitions. [2022-02-10 03:04:52,244 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1503 transitions. Word has length 16 [2022-02-10 03:04:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:52,244 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1503 transitions. [2022-02-10 03:04:52,244 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) [2022-02-10 03:04:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1503 transitions. [2022-02-10 03:04:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:52,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:52,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:52,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:52,459 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 [2022-02-10 03:04:52,459 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:52,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:52,459 INFO L85 PathProgramCache]: Analyzing trace with hash 439009595, now seen corresponding path program 170 times [2022-02-10 03:04:52,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:52,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181226035] [2022-02-10 03:04:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:52,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:52,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:52,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181226035] [2022-02-10 03:04:52,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181226035] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:52,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271201012] [2022-02-10 03:04:52,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:04:52,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:52,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:52,921 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) [2022-02-10 03:04:52,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-10 03:04:52,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:04:52,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:52,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:04:52,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:53,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:53,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:53,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:53,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:53,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:53,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:53,483 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 [2022-02-10 03:04:53,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:53,485 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 58 treesize of output 46 [2022-02-10 03:04:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:53,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:54,399 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:04:54,399 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 [2022-02-10 03:04:54,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:54,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:54,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:54,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:54,433 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 [2022-02-10 03:04:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:54,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271201012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:54,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:54,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:04:54,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137793703] [2022-02-10 03:04:54,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:54,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:54,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:54,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:54,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:54,848 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) [2022-02-10 03:04:56,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:56,086 INFO L93 Difference]: Finished difference Result 687 states and 1996 transitions. [2022-02-10 03:04:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:04:56,087 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 [2022-02-10 03:04:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:56,088 INFO L225 Difference]: With dead ends: 687 [2022-02-10 03:04:56,088 INFO L226 Difference]: Without dead ends: 684 [2022-02-10 03:04:56,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-02-10 03:04:56,088 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:56,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 15 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 408 Invalid, 0 Unknown, 245 Unchecked, 0.2s Time] [2022-02-10 03:04:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-10 03:04:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 505. [2022-02-10 03:04:56,094 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) [2022-02-10 03:04:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1507 transitions. [2022-02-10 03:04:56,095 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1507 transitions. Word has length 16 [2022-02-10 03:04:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:56,095 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1507 transitions. [2022-02-10 03:04:56,095 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) [2022-02-10 03:04:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1507 transitions. [2022-02-10 03:04:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:04:56,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:56,096 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:56,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-02-10 03:04:56,296 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 [2022-02-10 03:04:56,296 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:56,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash 974239397, now seen corresponding path program 171 times [2022-02-10 03:04:56,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:56,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131035694] [2022-02-10 03:04:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:56,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:56,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:56,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131035694] [2022-02-10 03:04:56,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131035694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:56,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715827552] [2022-02-10 03:04:56,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:04:56,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:56,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:56,574 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) [2022-02-10 03:04:56,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-10 03:04:56,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:04:56,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:56,599 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-10 03:04:56,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:57,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:57,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:57,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:04:57,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:57,235 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 [2022-02-10 03:04:57,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:57,237 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:04:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:57,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:58,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:58,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:58,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:58,228 INFO L353 Elim1Store]: treesize reduction 46, result has 49.5 percent of original size [2022-02-10 03:04:58,228 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 [2022-02-10 03:04:58,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:58,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:58,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:58,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:58,263 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 [2022-02-10 03:04:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:59,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715827552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:59,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:59,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-10 03:04:59,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703172045] [2022-02-10 03:04:59,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:59,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:04:59,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:59,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:04:59,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:04:59,029 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) [2022-02-10 03:05:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:00,806 INFO L93 Difference]: Finished difference Result 701 states and 2008 transitions. [2022-02-10 03:05:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:05:00,807 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 [2022-02-10 03:05:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:00,808 INFO L225 Difference]: With dead ends: 701 [2022-02-10 03:05:00,808 INFO L226 Difference]: Without dead ends: 698 [2022-02-10 03:05:00,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2022-02-10 03:05:00,808 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 [2022-02-10 03:05:00,808 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] [2022-02-10 03:05:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-10 03:05:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 508. [2022-02-10 03:05:00,814 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) [2022-02-10 03:05:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1516 transitions. [2022-02-10 03:05:00,815 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1516 transitions. Word has length 16 [2022-02-10 03:05:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:00,815 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1516 transitions. [2022-02-10 03:05:00,815 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) [2022-02-10 03:05:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1516 transitions. [2022-02-10 03:05:00,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:00,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:00,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:00,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:01,031 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 [2022-02-10 03:05:01,031 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:01,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash 469179237, now seen corresponding path program 172 times [2022-02-10 03:05:01,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:01,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100125480] [2022-02-10 03:05:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:01,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:01,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:01,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100125480] [2022-02-10 03:05:01,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100125480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:01,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634393449] [2022-02-10 03:05:01,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:05:01,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:01,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:01,305 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) [2022-02-10 03:05:01,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-10 03:05:01,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:05:01,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:01,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:01,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:01,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:01,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:01,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:01,874 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 [2022-02-10 03:05:01,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:01,876 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 58 treesize of output 46 [2022-02-10 03:05:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:01,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:02,737 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:02,738 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 [2022-02-10 03:05:02,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:02,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:02,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:02,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:02,770 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 [2022-02-10 03:05:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:03,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634393449] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:03,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:03,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:05:03,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216890688] [2022-02-10 03:05:03,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:03,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:03,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:03,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:03,300 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) [2022-02-10 03:05:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:03,999 INFO L93 Difference]: Finished difference Result 621 states and 1808 transitions. [2022-02-10 03:05:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:05:04,000 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 [2022-02-10 03:05:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:04,001 INFO L225 Difference]: With dead ends: 621 [2022-02-10 03:05:04,001 INFO L226 Difference]: Without dead ends: 616 [2022-02-10 03:05:04,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:05:04,001 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 [2022-02-10 03:05:04,001 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] [2022-02-10 03:05:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-02-10 03:05:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 506. [2022-02-10 03:05:04,007 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) [2022-02-10 03:05:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1509 transitions. [2022-02-10 03:05:04,007 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1509 transitions. Word has length 16 [2022-02-10 03:05:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:04,008 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1509 transitions. [2022-02-10 03:05:04,008 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) [2022-02-10 03:05:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1509 transitions. [2022-02-10 03:05:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:04,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:04,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:04,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-02-10 03:05:04,223 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 [2022-02-10 03:05:04,223 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:04,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1213943779, now seen corresponding path program 173 times [2022-02-10 03:05:04,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:04,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210722662] [2022-02-10 03:05:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:04,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:04,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:04,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210722662] [2022-02-10 03:05:04,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210722662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:04,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228462032] [2022-02-10 03:05:04,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:05:04,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:04,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:04,460 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) [2022-02-10 03:05:04,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-10 03:05:04,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:05:04,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:04,488 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:04,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:04,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:04,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:04,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:04,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:04,999 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 [2022-02-10 03:05:05,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:05,001 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 58 treesize of output 46 [2022-02-10 03:05:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:05,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:05,891 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:05,892 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 [2022-02-10 03:05:05,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:05,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:05,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:05,925 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 [2022-02-10 03:05:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:06,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228462032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:06,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:06,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:05:06,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629416752] [2022-02-10 03:05:06,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:06,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:05:06,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:06,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:05:06,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:06,345 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) [2022-02-10 03:05:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:06,887 INFO L93 Difference]: Finished difference Result 576 states and 1664 transitions. [2022-02-10 03:05:06,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:05:06,887 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 [2022-02-10 03:05:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:06,888 INFO L225 Difference]: With dead ends: 576 [2022-02-10 03:05:06,888 INFO L226 Difference]: Without dead ends: 573 [2022-02-10 03:05:06,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:05:06,888 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 [2022-02-10 03:05:06,888 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] [2022-02-10 03:05:06,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-02-10 03:05:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 508. [2022-02-10 03:05:06,893 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) [2022-02-10 03:05:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1515 transitions. [2022-02-10 03:05:06,894 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1515 transitions. Word has length 16 [2022-02-10 03:05:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:06,894 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1515 transitions. [2022-02-10 03:05:06,894 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) [2022-02-10 03:05:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1515 transitions. [2022-02-10 03:05:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:06,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:06,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:06,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-02-10 03:05:07,103 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 [2022-02-10 03:05:07,103 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash 846916023, now seen corresponding path program 174 times [2022-02-10 03:05:07,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:07,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465754930] [2022-02-10 03:05:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:07,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:07,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:07,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465754930] [2022-02-10 03:05:07,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465754930] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:07,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287072764] [2022-02-10 03:05:07,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:05:07,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:07,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:07,442 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) [2022-02-10 03:05:07,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-10 03:05:07,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:05:07,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:07,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:08,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:08,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:08,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:08,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:08,031 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 [2022-02-10 03:05:08,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:08,034 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:05:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:08,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:08,948 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:08,948 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 [2022-02-10 03:05:08,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:08,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:08,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:08,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:08,991 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 [2022-02-10 03:05:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:09,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287072764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:09,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:09,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:05:09,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274270720] [2022-02-10 03:05:09,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:09,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:09,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:09,498 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) [2022-02-10 03:05:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:10,343 INFO L93 Difference]: Finished difference Result 597 states and 1696 transitions. [2022-02-10 03:05:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:05:10,343 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 [2022-02-10 03:05:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:10,344 INFO L225 Difference]: With dead ends: 597 [2022-02-10 03:05:10,344 INFO L226 Difference]: Without dead ends: 591 [2022-02-10 03:05:10,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:05:10,344 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:10,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 688 Invalid, 0 Unknown, 102 Unchecked, 0.4s Time] [2022-02-10 03:05:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-02-10 03:05:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 511. [2022-02-10 03:05:10,349 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) [2022-02-10 03:05:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1525 transitions. [2022-02-10 03:05:10,350 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1525 transitions. Word has length 16 [2022-02-10 03:05:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:10,350 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1525 transitions. [2022-02-10 03:05:10,350 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) [2022-02-10 03:05:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1525 transitions. [2022-02-10 03:05:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:10,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:10,351 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:10,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-02-10 03:05:10,551 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 [2022-02-10 03:05:10,551 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:10,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1920001403, now seen corresponding path program 175 times [2022-02-10 03:05:10,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:10,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596969588] [2022-02-10 03:05:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:10,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:10,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:10,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596969588] [2022-02-10 03:05:10,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596969588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:10,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720488946] [2022-02-10 03:05:10,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:05:10,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:10,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:10,765 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) [2022-02-10 03:05:10,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-10 03:05:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:10,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:10,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:11,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:11,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:11,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:11,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:11,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:11,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:11,296 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 [2022-02-10 03:05:11,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:11,298 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 [2022-02-10 03:05:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:11,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:12,280 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:12,281 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 [2022-02-10 03:05:12,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:12,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:12,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:12,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:12,313 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 [2022-02-10 03:05:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:12,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720488946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:12,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:12,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:05:12,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443686986] [2022-02-10 03:05:12,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:12,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:05:12,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:05:12,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:12,743 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) [2022-02-10 03:05:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:13,571 INFO L93 Difference]: Finished difference Result 599 states and 1710 transitions. [2022-02-10 03:05:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:05:13,572 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 [2022-02-10 03:05:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:13,573 INFO L225 Difference]: With dead ends: 599 [2022-02-10 03:05:13,573 INFO L226 Difference]: Without dead ends: 590 [2022-02-10 03:05:13,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:05:13,573 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 [2022-02-10 03:05:13,573 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] [2022-02-10 03:05:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-02-10 03:05:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 513. [2022-02-10 03:05:13,578 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) [2022-02-10 03:05:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1530 transitions. [2022-02-10 03:05:13,579 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1530 transitions. Word has length 16 [2022-02-10 03:05:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:13,579 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1530 transitions. [2022-02-10 03:05:13,579 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) [2022-02-10 03:05:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1530 transitions. [2022-02-10 03:05:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:13,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:13,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:13,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:13,796 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 [2022-02-10 03:05:13,796 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:13,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2135323555, now seen corresponding path program 176 times [2022-02-10 03:05:13,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:13,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66361656] [2022-02-10 03:05:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:13,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:13,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:13,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66361656] [2022-02-10 03:05:13,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66361656] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:13,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928957186] [2022-02-10 03:05:13,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:05:13,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:13,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:13,995 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) [2022-02-10 03:05:13,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-10 03:05:14,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:05:14,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:14,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:14,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:14,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:14,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:14,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:14,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:14,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:14,569 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 [2022-02-10 03:05:14,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:14,571 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 58 treesize of output 46 [2022-02-10 03:05:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:14,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:15,589 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:15,590 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 [2022-02-10 03:05:15,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:15,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:15,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:15,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:15,622 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 [2022-02-10 03:05:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:16,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928957186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:16,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:16,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:05:16,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228664952] [2022-02-10 03:05:16,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:16,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:05:16,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:05:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:16,067 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) [2022-02-10 03:05:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:16,997 INFO L93 Difference]: Finished difference Result 599 states and 1707 transitions. [2022-02-10 03:05:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:05:16,997 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 [2022-02-10 03:05:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:16,998 INFO L225 Difference]: With dead ends: 599 [2022-02-10 03:05:16,998 INFO L226 Difference]: Without dead ends: 595 [2022-02-10 03:05:16,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:05:16,998 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 [2022-02-10 03:05:16,998 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] [2022-02-10 03:05:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-10 03:05:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 518. [2022-02-10 03:05:17,003 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) [2022-02-10 03:05:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1546 transitions. [2022-02-10 03:05:17,004 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1546 transitions. Word has length 16 [2022-02-10 03:05:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:17,004 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1546 transitions. [2022-02-10 03:05:17,004 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) [2022-02-10 03:05:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1546 transitions. [2022-02-10 03:05:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:17,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:17,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:17,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-02-10 03:05:17,205 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 [2022-02-10 03:05:17,205 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:17,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2127593157, now seen corresponding path program 177 times [2022-02-10 03:05:17,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:17,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033983947] [2022-02-10 03:05:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:17,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:17,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:17,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033983947] [2022-02-10 03:05:17,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033983947] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:17,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685370429] [2022-02-10 03:05:17,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:05:17,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:17,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:17,382 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) [2022-02-10 03:05:17,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-10 03:05:17,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:05:17,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:17,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:17,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:17,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:17,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:17,866 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 [2022-02-10 03:05:17,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:17,868 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 60 treesize of output 48 [2022-02-10 03:05:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:17,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:18,874 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:18,874 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 [2022-02-10 03:05:18,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:18,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:18,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:18,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:18,908 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 [2022-02-10 03:05:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:19,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685370429] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:19,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:19,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:05:19,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448365500] [2022-02-10 03:05:19,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:19,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:19,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:19,529 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) [2022-02-10 03:05:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:21,356 INFO L93 Difference]: Finished difference Result 657 states and 1820 transitions. [2022-02-10 03:05:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:05:21,356 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 [2022-02-10 03:05:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:21,357 INFO L225 Difference]: With dead ends: 657 [2022-02-10 03:05:21,357 INFO L226 Difference]: Without dead ends: 651 [2022-02-10 03:05:21,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:05:21,357 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:21,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 92 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-10 03:05:21,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-02-10 03:05:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 526. [2022-02-10 03:05:21,363 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) [2022-02-10 03:05:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1574 transitions. [2022-02-10 03:05:21,364 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1574 transitions. Word has length 16 [2022-02-10 03:05:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:21,364 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1574 transitions. [2022-02-10 03:05:21,364 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) [2022-02-10 03:05:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1574 transitions. [2022-02-10 03:05:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:21,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:21,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:21,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-02-10 03:05:21,566 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 [2022-02-10 03:05:21,567 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash -328145499, now seen corresponding path program 178 times [2022-02-10 03:05:21,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:21,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851014810] [2022-02-10 03:05:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:21,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:21,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:21,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851014810] [2022-02-10 03:05:21,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851014810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:21,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857703351] [2022-02-10 03:05:21,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:05:21,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:21,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:21,773 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) [2022-02-10 03:05:21,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-10 03:05:21,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:05:21,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:21,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:22,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:22,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:22,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:22,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:22,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:22,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:22,320 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 [2022-02-10 03:05:22,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:22,322 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 58 treesize of output 46 [2022-02-10 03:05:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:22,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:23,248 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:23,248 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 [2022-02-10 03:05:23,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:23,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:23,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:23,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:23,281 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 [2022-02-10 03:05:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:23,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857703351] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:23,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:23,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:05:23,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797937418] [2022-02-10 03:05:23,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:23,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:05:23,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:23,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:05:23,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:23,732 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) [2022-02-10 03:05:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:24,116 INFO L93 Difference]: Finished difference Result 565 states and 1655 transitions. [2022-02-10 03:05:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:05:24,116 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 [2022-02-10 03:05:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:24,117 INFO L225 Difference]: With dead ends: 565 [2022-02-10 03:05:24,117 INFO L226 Difference]: Without dead ends: 562 [2022-02-10 03:05:24,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:05:24,117 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 [2022-02-10 03:05:24,117 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] [2022-02-10 03:05:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-02-10 03:05:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 528. [2022-02-10 03:05:24,127 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) [2022-02-10 03:05:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1580 transitions. [2022-02-10 03:05:24,128 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1580 transitions. Word has length 16 [2022-02-10 03:05:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:24,128 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1580 transitions. [2022-02-10 03:05:24,128 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) [2022-02-10 03:05:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1580 transitions. [2022-02-10 03:05:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:24,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:24,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:24,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-02-10 03:05:24,331 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 [2022-02-10 03:05:24,331 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1732714303, now seen corresponding path program 179 times [2022-02-10 03:05:24,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:24,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080795383] [2022-02-10 03:05:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:24,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:24,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:24,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080795383] [2022-02-10 03:05:24,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080795383] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:24,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071261138] [2022-02-10 03:05:24,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:05:24,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:24,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:24,547 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) [2022-02-10 03:05:24,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-10 03:05:24,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:05:24,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:24,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:25,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:25,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:25,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:25,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:25,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:25,094 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 [2022-02-10 03:05:25,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:25,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:05:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:25,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:26,016 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:26,016 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 [2022-02-10 03:05:26,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:26,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:26,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:26,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:26,049 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 195 treesize of output 233 [2022-02-10 03:05:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:26,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071261138] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:26,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:26,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:05:26,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357171038] [2022-02-10 03:05:26,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:26,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:05:26,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:26,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:05:26,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:26,452 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) [2022-02-10 03:05:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:27,027 INFO L93 Difference]: Finished difference Result 581 states and 1682 transitions. [2022-02-10 03:05:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:05:27,028 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 [2022-02-10 03:05:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:27,029 INFO L225 Difference]: With dead ends: 581 [2022-02-10 03:05:27,029 INFO L226 Difference]: Without dead ends: 575 [2022-02-10 03:05:27,029 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 [2022-02-10 03:05:27,029 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 [2022-02-10 03:05:27,029 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] [2022-02-10 03:05:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-10 03:05:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 529. [2022-02-10 03:05:27,034 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) [2022-02-10 03:05:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1583 transitions. [2022-02-10 03:05:27,035 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1583 transitions. Word has length 16 [2022-02-10 03:05:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:27,035 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1583 transitions. [2022-02-10 03:05:27,035 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) [2022-02-10 03:05:27,035 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1583 transitions. [2022-02-10 03:05:27,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:27,036 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:27,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:27,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-02-10 03:05:27,242 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 [2022-02-10 03:05:27,243 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1249525275, now seen corresponding path program 180 times [2022-02-10 03:05:27,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:27,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220100302] [2022-02-10 03:05:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:27,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:27,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:27,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220100302] [2022-02-10 03:05:27,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220100302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:27,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156129191] [2022-02-10 03:05:27,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:05:27,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:27,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:27,438 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) [2022-02-10 03:05:27,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-10 03:05:27,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:05:27,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:27,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:27,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:27,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:27,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:27,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:27,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:27,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:27,984 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 [2022-02-10 03:05:27,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:27,986 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:05:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:28,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:29,022 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:29,023 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 [2022-02-10 03:05:29,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:29,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:29,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:29,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:29,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 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 [2022-02-10 03:05:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:29,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156129191] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:29,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:29,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:05:29,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331932826] [2022-02-10 03:05:29,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:29,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:05:29,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:29,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:05:29,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:29,466 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) [2022-02-10 03:05:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:30,907 INFO L93 Difference]: Finished difference Result 623 states and 1752 transitions. [2022-02-10 03:05:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:05:30,907 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 [2022-02-10 03:05:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:30,908 INFO L225 Difference]: With dead ends: 623 [2022-02-10 03:05:30,908 INFO L226 Difference]: Without dead ends: 617 [2022-02-10 03:05:30,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:05:30,908 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 [2022-02-10 03:05:30,908 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] [2022-02-10 03:05:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-10 03:05:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 545. [2022-02-10 03:05:30,914 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) [2022-02-10 03:05:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1636 transitions. [2022-02-10 03:05:30,915 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1636 transitions. Word has length 16 [2022-02-10 03:05:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:30,915 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1636 transitions. [2022-02-10 03:05:30,915 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) [2022-02-10 03:05:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1636 transitions. [2022-02-10 03:05:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:30,915 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:30,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:30,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:31,135 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 [2022-02-10 03:05:31,135 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:31,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:31,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1241794877, now seen corresponding path program 181 times [2022-02-10 03:05:31,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:31,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604416366] [2022-02-10 03:05:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:31,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:31,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:31,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604416366] [2022-02-10 03:05:31,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604416366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:31,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581635679] [2022-02-10 03:05:31,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:05:31,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:31,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:31,468 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) [2022-02-10 03:05:31,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-10 03:05:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:31,491 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:31,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:31,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:31,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:31,997 INFO L353 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-02-10 03:05:31,997 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 [2022-02-10 03:05:32,003 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:05:32,003 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-10 03:05:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:32,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:33,133 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:33,133 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 [2022-02-10 03:05:33,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:33,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:33,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:33,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:33,167 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 [2022-02-10 03:05:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:33,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581635679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:33,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:33,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:05:33,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945596386] [2022-02-10 03:05:33,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:33,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:33,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:33,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:33,548 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) [2022-02-10 03:05:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:36,454 INFO L93 Difference]: Finished difference Result 645 states and 1819 transitions. [2022-02-10 03:05:36,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:05:36,454 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 [2022-02-10 03:05:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:36,455 INFO L225 Difference]: With dead ends: 645 [2022-02-10 03:05:36,455 INFO L226 Difference]: Without dead ends: 635 [2022-02-10 03:05:36,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 03:05:36,455 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:36,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 69 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-10 03:05:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-02-10 03:05:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 552. [2022-02-10 03:05:36,461 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) [2022-02-10 03:05:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1662 transitions. [2022-02-10 03:05:36,462 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1662 transitions. Word has length 16 [2022-02-10 03:05:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:36,462 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1662 transitions. [2022-02-10 03:05:36,462 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) [2022-02-10 03:05:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1662 transitions. [2022-02-10 03:05:36,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:36,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:36,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:36,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-02-10 03:05:36,663 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 [2022-02-10 03:05:36,663 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:36,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:36,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1711708095, now seen corresponding path program 182 times [2022-02-10 03:05:36,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:36,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858816517] [2022-02-10 03:05:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:36,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:36,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:36,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858816517] [2022-02-10 03:05:36,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858816517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:36,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182403554] [2022-02-10 03:05:36,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:05:36,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:36,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:36,876 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) [2022-02-10 03:05:36,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-10 03:05:36,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:05:36,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:36,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:36,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:37,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:37,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:37,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:37,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:37,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:37,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:37,432 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 [2022-02-10 03:05:37,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:37,434 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:05:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:37,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:38,409 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:38,409 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 [2022-02-10 03:05:38,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:38,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:38,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:38,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:38,442 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 [2022-02-10 03:05:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:39,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182403554] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:39,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:39,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:05:39,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301271538] [2022-02-10 03:05:39,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:39,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:05:39,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:05:39,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:39,011 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) [2022-02-10 03:05:40,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:40,353 INFO L93 Difference]: Finished difference Result 633 states and 1803 transitions. [2022-02-10 03:05:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:05:40,354 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 [2022-02-10 03:05:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:40,355 INFO L225 Difference]: With dead ends: 633 [2022-02-10 03:05:40,355 INFO L226 Difference]: Without dead ends: 621 [2022-02-10 03:05:40,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:05:40,355 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 [2022-02-10 03:05:40,355 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] [2022-02-10 03:05:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-02-10 03:05:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 554. [2022-02-10 03:05:40,361 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) [2022-02-10 03:05:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1669 transitions. [2022-02-10 03:05:40,361 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1669 transitions. Word has length 16 [2022-02-10 03:05:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:40,362 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1669 transitions. [2022-02-10 03:05:40,362 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) [2022-02-10 03:05:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1669 transitions. [2022-02-10 03:05:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:40,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:40,362 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:40,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-02-10 03:05:40,563 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 [2022-02-10 03:05:40,563 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:40,563 INFO L85 PathProgramCache]: Analyzing trace with hash -854211867, now seen corresponding path program 183 times [2022-02-10 03:05:40,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:40,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352053755] [2022-02-10 03:05:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:40,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:40,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:40,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352053755] [2022-02-10 03:05:40,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352053755] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:40,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008986177] [2022-02-10 03:05:40,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:05:40,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:40,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:40,792 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) [2022-02-10 03:05:40,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-10 03:05:40,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:05:40,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:40,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:40,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:41,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:41,380 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 [2022-02-10 03:05:41,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:41,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:05:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:41,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:42,362 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:42,362 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 [2022-02-10 03:05:42,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:42,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:42,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:42,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:42,396 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 [2022-02-10 03:05:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:42,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008986177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:42,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:42,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:05:42,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47401842] [2022-02-10 03:05:42,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:42,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:05:42,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:05:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:42,752 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) [2022-02-10 03:05:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:44,284 INFO L93 Difference]: Finished difference Result 687 states and 1918 transitions. [2022-02-10 03:05:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:05:44,284 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 [2022-02-10 03:05:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:44,285 INFO L225 Difference]: With dead ends: 687 [2022-02-10 03:05:44,285 INFO L226 Difference]: Without dead ends: 673 [2022-02-10 03:05:44,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:05:44,286 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:44,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 58 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 642 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2022-02-10 03:05:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-02-10 03:05:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 553. [2022-02-10 03:05:44,291 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) [2022-02-10 03:05:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1674 transitions. [2022-02-10 03:05:44,292 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1674 transitions. Word has length 16 [2022-02-10 03:05:44,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:44,293 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 1674 transitions. [2022-02-10 03:05:44,293 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) [2022-02-10 03:05:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1674 transitions. [2022-02-10 03:05:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:44,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:44,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:44,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-02-10 03:05:44,493 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 [2022-02-10 03:05:44,494 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1270531483, now seen corresponding path program 184 times [2022-02-10 03:05:44,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:44,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437081745] [2022-02-10 03:05:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:44,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:44,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:44,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437081745] [2022-02-10 03:05:44,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437081745] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:44,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747280019] [2022-02-10 03:05:44,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:05:44,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:44,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:44,679 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) [2022-02-10 03:05:44,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-10 03:05:44,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:05:44,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:44,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:44,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:45,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:45,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:45,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:45,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:45,268 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 [2022-02-10 03:05:45,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:45,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:05:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:45,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:46,274 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:46,275 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 [2022-02-10 03:05:46,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:46,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:46,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:46,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:46,308 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 [2022-02-10 03:05:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:46,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747280019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:46,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:46,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-10 03:05:46,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42052021] [2022-02-10 03:05:46,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:46,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:05:46,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:46,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:05:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:05:46,898 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) [2022-02-10 03:05:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:47,905 INFO L93 Difference]: Finished difference Result 639 states and 1850 transitions. [2022-02-10 03:05:47,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:05:47,905 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 [2022-02-10 03:05:47,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:47,906 INFO L225 Difference]: With dead ends: 639 [2022-02-10 03:05:47,906 INFO L226 Difference]: Without dead ends: 630 [2022-02-10 03:05:47,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:05:47,906 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 [2022-02-10 03:05:47,906 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] [2022-02-10 03:05:47,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-02-10 03:05:47,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 551. [2022-02-10 03:05:47,912 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) [2022-02-10 03:05:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1675 transitions. [2022-02-10 03:05:47,913 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1675 transitions. Word has length 16 [2022-02-10 03:05:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:47,913 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 1675 transitions. [2022-02-10 03:05:47,913 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) [2022-02-10 03:05:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1675 transitions. [2022-02-10 03:05:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:47,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:47,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:47,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:48,114 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 [2022-02-10 03:05:48,114 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:48,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:48,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1542761215, now seen corresponding path program 185 times [2022-02-10 03:05:48,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:48,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550380394] [2022-02-10 03:05:48,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:48,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:48,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:48,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550380394] [2022-02-10 03:05:48,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550380394] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:48,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521468916] [2022-02-10 03:05:48,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:05:48,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:48,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:48,323 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) [2022-02-10 03:05:48,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-10 03:05:48,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:05:48,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:48,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:48,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:48,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:48,829 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 [2022-02-10 03:05:48,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:48,831 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 60 treesize of output 48 [2022-02-10 03:05:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:48,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:49,809 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-02-10 03:05:49,810 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 [2022-02-10 03:05:49,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:49,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:49,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:49,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:49,843 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 [2022-02-10 03:05:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:50,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521468916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:50,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:50,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:05:50,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590852824] [2022-02-10 03:05:50,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:50,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:50,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:50,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:50,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:50,322 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) [2022-02-10 03:05:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:53,073 INFO L93 Difference]: Finished difference Result 697 states and 1948 transitions. [2022-02-10 03:05:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:05:53,073 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 [2022-02-10 03:05:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:53,074 INFO L225 Difference]: With dead ends: 697 [2022-02-10 03:05:53,075 INFO L226 Difference]: Without dead ends: 690 [2022-02-10 03:05:53,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:05:53,075 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-02-10 03:05:53,075 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] [2022-02-10 03:05:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-10 03:05:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 554. [2022-02-10 03:05:53,084 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) [2022-02-10 03:05:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1683 transitions. [2022-02-10 03:05:53,085 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1683 transitions. Word has length 16 [2022-02-10 03:05:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:53,086 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1683 transitions. [2022-02-10 03:05:53,086 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) [2022-02-10 03:05:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1683 transitions. [2022-02-10 03:05:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:53,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:53,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:53,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:53,287 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 [2022-02-10 03:05:53,287 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:53,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1361797405, now seen corresponding path program 186 times [2022-02-10 03:05:53,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:53,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429329465] [2022-02-10 03:05:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:53,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:53,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:53,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429329465] [2022-02-10 03:05:53,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429329465] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:53,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845441983] [2022-02-10 03:05:53,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:05:53,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:53,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:53,499 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) [2022-02-10 03:05:53,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-10 03:05:53,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:05:53,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:53,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:53,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:54,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:54,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:54,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:54,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,029 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 [2022-02-10 03:05:54,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:05:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:54,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:54,763 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-10 03:05:54,764 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 [2022-02-10 03:05:54,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:54,799 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 [2022-02-10 03:05:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:55,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845441983] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:55,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:55,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:05:55,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135950252] [2022-02-10 03:05:55,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:55,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:55,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:55,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:55,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:55,141 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) [2022-02-10 03:05:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:55,433 INFO L93 Difference]: Finished difference Result 589 states and 1744 transitions. [2022-02-10 03:05:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:05:55,433 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 [2022-02-10 03:05:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:55,434 INFO L225 Difference]: With dead ends: 589 [2022-02-10 03:05:55,434 INFO L226 Difference]: Without dead ends: 586 [2022-02-10 03:05:55,434 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 [2022-02-10 03:05:55,434 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 [2022-02-10 03:05:55,434 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] [2022-02-10 03:05:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-10 03:05:55,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 558. [2022-02-10 03:05:55,440 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) [2022-02-10 03:05:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1695 transitions. [2022-02-10 03:05:55,441 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1695 transitions. Word has length 16 [2022-02-10 03:05:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:55,441 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 1695 transitions. [2022-02-10 03:05:55,441 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) [2022-02-10 03:05:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1695 transitions. [2022-02-10 03:05:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:55,442 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:55,442 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:55,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-02-10 03:05:55,642 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 [2022-02-10 03:05:55,642 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:55,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash 856737245, now seen corresponding path program 187 times [2022-02-10 03:05:55,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:55,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107929106] [2022-02-10 03:05:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:55,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:55,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:55,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107929106] [2022-02-10 03:05:55,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107929106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:55,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527104677] [2022-02-10 03:05:55,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:05:55,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:55,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:55,980 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) [2022-02-10 03:05:55,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-10 03:05:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:56,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:56,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:56,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:56,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:56,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:56,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:56,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:56,494 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 [2022-02-10 03:05:56,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:56,496 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 58 treesize of output 46 [2022-02-10 03:05:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:56,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:57,256 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-10 03:05:57,256 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 [2022-02-10 03:05:57,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:57,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:57,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:57,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:57,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:57,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:57,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:57,291 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 [2022-02-10 03:05:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:57,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527104677] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:57,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:57,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:05:57,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964654676] [2022-02-10 03:05:57,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:57,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:05:57,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:57,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:05:57,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:57,707 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) [2022-02-10 03:05:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:58,381 INFO L93 Difference]: Finished difference Result 621 states and 1821 transitions. [2022-02-10 03:05:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:05:58,382 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 [2022-02-10 03:05:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:58,382 INFO L225 Difference]: With dead ends: 621 [2022-02-10 03:05:58,383 INFO L226 Difference]: Without dead ends: 612 [2022-02-10 03:05:58,383 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 [2022-02-10 03:05:58,383 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 [2022-02-10 03:05:58,383 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] [2022-02-10 03:05:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-02-10 03:05:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 569. [2022-02-10 03:05:58,388 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) [2022-02-10 03:05:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1726 transitions. [2022-02-10 03:05:58,389 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1726 transitions. Word has length 16 [2022-02-10 03:05:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:58,390 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1726 transitions. [2022-02-10 03:05:58,390 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) [2022-02-10 03:05:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1726 transitions. [2022-02-10 03:05:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:05:58,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:58,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:58,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-02-10 03:05:58,591 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 [2022-02-10 03:05:58,591 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:05:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash 448148027, now seen corresponding path program 188 times [2022-02-10 03:05:58,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:58,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071439361] [2022-02-10 03:05:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:58,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:58,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:58,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071439361] [2022-02-10 03:05:58,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071439361] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:58,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887866054] [2022-02-10 03:05:58,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:05:58,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:58,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:58,762 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) [2022-02-10 03:05:58,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-10 03:05:58,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:05:58,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:58,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:05:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:59,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:59,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:59,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:05:59,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:59,253 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 [2022-02-10 03:05:59,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:59,255 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 60 treesize of output 48 [2022-02-10 03:05:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:05:59,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:00,099 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-10 03:06:00,099 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 [2022-02-10 03:06:00,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:00,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:00,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:00,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:00,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:00,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:00,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:00,135 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 [2022-02-10 03:06:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:00,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887866054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:00,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:00,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:06:00,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480721132] [2022-02-10 03:06:00,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:00,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:06:00,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:00,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:06:00,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:00,615 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) [2022-02-10 03:06:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:01,895 INFO L93 Difference]: Finished difference Result 718 states and 2024 transitions. [2022-02-10 03:06:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:06:01,895 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 [2022-02-10 03:06:01,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:01,896 INFO L225 Difference]: With dead ends: 718 [2022-02-10 03:06:01,896 INFO L226 Difference]: Without dead ends: 711 [2022-02-10 03:06:01,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:06:01,896 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 [2022-02-10 03:06:01,896 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] [2022-02-10 03:06:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-02-10 03:06:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 609. [2022-02-10 03:06:01,903 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) [2022-02-10 03:06:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1862 transitions. [2022-02-10 03:06:01,904 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1862 transitions. Word has length 16 [2022-02-10 03:06:01,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:01,904 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 1862 transitions. [2022-02-10 03:06:01,904 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) [2022-02-10 03:06:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1862 transitions. [2022-02-10 03:06:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:06:01,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:01,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:01,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-02-10 03:06:02,105 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 [2022-02-10 03:06:02,105 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:02,105 INFO L85 PathProgramCache]: Analyzing trace with hash -450417157, now seen corresponding path program 189 times [2022-02-10 03:06:02,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:02,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422730823] [2022-02-10 03:06:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:02,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:02,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:02,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422730823] [2022-02-10 03:06:02,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422730823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:02,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154888103] [2022-02-10 03:06:02,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:02,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:02,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:02,346 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) [2022-02-10 03:06:02,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-10 03:06:02,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:06:02,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:02,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-10 03:06:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:02,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:06:02,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:06:02,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:06:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:06:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:06:03,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,001 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 [2022-02-10 03:06:03,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,004 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 58 treesize of output 46 [2022-02-10 03:06:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:03,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:03,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,992 INFO L353 Elim1Store]: treesize reduction 96, result has 33.8 percent of original size [2022-02-10 03:06:03,992 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 [2022-02-10 03:06:03,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:04,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:04,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:04,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:04,029 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 [2022-02-10 03:06:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:05,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154888103] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:05,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:05,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-10 03:06:05,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205022841] [2022-02-10 03:06:05,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:05,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:06:05,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:05,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:06:05,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:06:05,016 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) [2022-02-10 03:06:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:09,355 INFO L93 Difference]: Finished difference Result 800 states and 2253 transitions. [2022-02-10 03:06:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-10 03:06:09,355 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 [2022-02-10 03:06:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:09,356 INFO L225 Difference]: With dead ends: 800 [2022-02-10 03:06:09,356 INFO L226 Difference]: Without dead ends: 788 [2022-02-10 03:06:09,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=385, Invalid=2695, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 03:06:09,357 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 79 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:09,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 86 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 877 Invalid, 0 Unknown, 219 Unchecked, 0.6s Time] [2022-02-10 03:06:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-10 03:06:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2022-02-10 03:06:09,364 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) [2022-02-10 03:06:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2073 transitions. [2022-02-10 03:06:09,365 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2073 transitions. Word has length 16 [2022-02-10 03:06:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:09,365 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 2073 transitions. [2022-02-10 03:06:09,365 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) [2022-02-10 03:06:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2073 transitions. [2022-02-10 03:06:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:06:09,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:09,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:09,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:09,583 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 [2022-02-10 03:06:09,583 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:09,583 INFO L85 PathProgramCache]: Analyzing trace with hash -231781027, now seen corresponding path program 190 times [2022-02-10 03:06:09,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:09,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741205949] [2022-02-10 03:06:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:09,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:09,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:09,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741205949] [2022-02-10 03:06:09,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741205949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:09,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125907779] [2022-02-10 03:06:09,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:09,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:09,934 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) [2022-02-10 03:06:09,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-10 03:06:09,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:09,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:09,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:06:09,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:06:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:06:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:06:10,517 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-02-10 03:06:10,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-10 03:06:10,522 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:06:10,522 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 62 treesize of output 53 [2022-02-10 03:06:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:10,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:11,488 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-10 03:06:11,489 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 [2022-02-10 03:06:11,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:11,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:11,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:11,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:11,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:11,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:11,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:11,525 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 [2022-02-10 03:06:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:12,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125907779] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:12,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:12,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-10 03:06:12,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030603985] [2022-02-10 03:06:12,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:12,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:06:12,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:06:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:06:12,045 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) [2022-02-10 03:06:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:13,538 INFO L93 Difference]: Finished difference Result 841 states and 2428 transitions. [2022-02-10 03:06:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:06:13,538 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 [2022-02-10 03:06:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:13,539 INFO L225 Difference]: With dead ends: 841 [2022-02-10 03:06:13,539 INFO L226 Difference]: Without dead ends: 832 [2022-02-10 03:06:13,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 03:06:13,540 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:13,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 65 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 780 Invalid, 0 Unknown, 109 Unchecked, 0.5s Time] [2022-02-10 03:06:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-02-10 03:06:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 705. [2022-02-10 03:06:13,548 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) [2022-02-10 03:06:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2201 transitions. [2022-02-10 03:06:13,549 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2201 transitions. Word has length 16 [2022-02-10 03:06:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:13,549 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2201 transitions. [2022-02-10 03:06:13,549 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) [2022-02-10 03:06:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2201 transitions. [2022-02-10 03:06:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 03:06:13,550 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:13,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:13,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-02-10 03:06:13,750 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 [2022-02-10 03:06:13,750 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:13,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:13,750 INFO L85 PathProgramCache]: Analyzing trace with hash -640370245, now seen corresponding path program 191 times [2022-02-10 03:06:13,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:13,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146186381] [2022-02-10 03:06:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:13,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:13,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:13,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146186381] [2022-02-10 03:06:13,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146186381] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:13,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600173954] [2022-02-10 03:06:13,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:13,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:13,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:13,923 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) [2022-02-10 03:06:13,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-10 03:06:13,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:06:13,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:13,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-10 03:06:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:14,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:14,306 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 [2022-02-10 03:06:14,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:14,308 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 60 treesize of output 48 [2022-02-10 03:06:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:14,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:15,055 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-02-10 03:06:15,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 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 [2022-02-10 03:06:15,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:15,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:15,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:15,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:15,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:15,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:15,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:15,094 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 [2022-02-10 03:06:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:15,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600173954] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:15,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:15,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:06:15,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998606683] [2022-02-10 03:06:15,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:15,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:06:15,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:15,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:06:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:15,610 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) [2022-02-10 03:06:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:16,928 INFO L93 Difference]: Finished difference Result 841 states and 2456 transitions. [2022-02-10 03:06:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:06:16,929 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 [2022-02-10 03:06:16,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:16,930 INFO L225 Difference]: With dead ends: 841 [2022-02-10 03:06:16,930 INFO L226 Difference]: Without dead ends: 834 [2022-02-10 03:06:16,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:06:16,930 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:16,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 74 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:06:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-02-10 03:06:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 715. [2022-02-10 03:06:16,938 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) [2022-02-10 03:06:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2237 transitions. [2022-02-10 03:06:16,939 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2237 transitions. Word has length 16 [2022-02-10 03:06:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:16,939 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 2237 transitions. [2022-02-10 03:06:16,940 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) [2022-02-10 03:06:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2237 transitions. [2022-02-10 03:06:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:16,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:16,940 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:16,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-02-10 03:06:17,141 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 [2022-02-10 03:06:17,141 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:17,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1571774135, now seen corresponding path program 192 times [2022-02-10 03:06:17,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:17,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741918136] [2022-02-10 03:06:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:17,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:17,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:17,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741918136] [2022-02-10 03:06:17,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741918136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:17,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456383540] [2022-02-10 03:06:17,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:17,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:17,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:17,257 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) [2022-02-10 03:06:17,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-10 03:06:17,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:06:17,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:17,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:17,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:17,415 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:06:17,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:17,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:17,525 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:17,525 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 38 treesize of output 31 [2022-02-10 03:06:17,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:17,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456383540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:17,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:17,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-10 03:06:17,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566924810] [2022-02-10 03:06:17,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:17,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:06:17,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:06:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:06:17,544 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) [2022-02-10 03:06:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:17,872 INFO L93 Difference]: Finished difference Result 946 states and 2878 transitions. [2022-02-10 03:06:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:06:17,872 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 [2022-02-10 03:06:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:17,873 INFO L225 Difference]: With dead ends: 946 [2022-02-10 03:06:17,874 INFO L226 Difference]: Without dead ends: 941 [2022-02-10 03:06:17,874 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 [2022-02-10 03:06:17,874 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:17,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 66 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:06:17,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-02-10 03:06:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 714. [2022-02-10 03:06:17,882 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) [2022-02-10 03:06:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2235 transitions. [2022-02-10 03:06:17,883 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2235 transitions. Word has length 17 [2022-02-10 03:06:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:17,883 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 2235 transitions. [2022-02-10 03:06:17,883 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) [2022-02-10 03:06:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2235 transitions. [2022-02-10 03:06:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:17,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:17,884 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:17,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:18,084 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 [2022-02-10 03:06:18,085 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:18,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1975304249, now seen corresponding path program 193 times [2022-02-10 03:06:18,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:18,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314229700] [2022-02-10 03:06:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:18,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:18,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:18,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314229700] [2022-02-10 03:06:18,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314229700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:18,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395762204] [2022-02-10 03:06:18,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:18,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:18,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:18,179 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) [2022-02-10 03:06:18,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-10 03:06:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:18,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:18,320 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 29 treesize of output 23 [2022-02-10 03:06:18,322 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 7 treesize of output 1 [2022-02-10 03:06:18,325 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-10 03:06:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:18,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:18,431 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:18,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:18,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:18,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395762204] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:18,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:18,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-10 03:06:18,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358620524] [2022-02-10 03:06:18,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:18,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:06:18,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:18,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:06:18,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:06:18,446 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) [2022-02-10 03:06:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:18,706 INFO L93 Difference]: Finished difference Result 949 states and 2889 transitions. [2022-02-10 03:06:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:06:18,707 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 [2022-02-10 03:06:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:18,708 INFO L225 Difference]: With dead ends: 949 [2022-02-10 03:06:18,708 INFO L226 Difference]: Without dead ends: 949 [2022-02-10 03:06:18,708 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 [2022-02-10 03:06:18,708 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:18,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 66 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:06:18,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-02-10 03:06:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 715. [2022-02-10 03:06:18,716 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) [2022-02-10 03:06:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2238 transitions. [2022-02-10 03:06:18,717 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2238 transitions. Word has length 17 [2022-02-10 03:06:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:18,717 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 2238 transitions. [2022-02-10 03:06:18,718 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) [2022-02-10 03:06:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2238 transitions. [2022-02-10 03:06:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:18,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:18,718 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:18,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:18,919 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 [2022-02-10 03:06:18,919 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2101260275, now seen corresponding path program 194 times [2022-02-10 03:06:18,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:18,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115391226] [2022-02-10 03:06:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:18,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:19,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:19,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115391226] [2022-02-10 03:06:19,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115391226] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:19,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157381593] [2022-02-10 03:06:19,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:19,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:19,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:19,025 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) [2022-02-10 03:06:19,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-10 03:06:19,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:19,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:19,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:19,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:19,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:19,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:19,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:19,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:19,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:19,391 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:19,391 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-10 03:06:19,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:19,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157381593] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:19,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:19,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:06:19,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476878085] [2022-02-10 03:06:19,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:19,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:19,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:19,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:19,411 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) [2022-02-10 03:06:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:19,781 INFO L93 Difference]: Finished difference Result 987 states and 2942 transitions. [2022-02-10 03:06:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:06:19,782 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 [2022-02-10 03:06:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:19,783 INFO L225 Difference]: With dead ends: 987 [2022-02-10 03:06:19,783 INFO L226 Difference]: Without dead ends: 987 [2022-02-10 03:06:19,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:06:19,783 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:06:19,783 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] [2022-02-10 03:06:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-02-10 03:06:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 720. [2022-02-10 03:06:19,792 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) [2022-02-10 03:06:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2255 transitions. [2022-02-10 03:06:19,793 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2255 transitions. Word has length 17 [2022-02-10 03:06:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:19,793 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 2255 transitions. [2022-02-10 03:06:19,793 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) [2022-02-10 03:06:19,793 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2255 transitions. [2022-02-10 03:06:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:19,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:19,794 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:19,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-02-10 03:06:19,994 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 [2022-02-10 03:06:19,994 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:19,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:19,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1392090793, now seen corresponding path program 195 times [2022-02-10 03:06:19,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:19,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346305939] [2022-02-10 03:06:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:19,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:20,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:20,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346305939] [2022-02-10 03:06:20,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346305939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:20,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119405618] [2022-02-10 03:06:20,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:20,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:20,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:20,100 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) [2022-02-10 03:06:20,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-10 03:06:20,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:06:20,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:20,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:20,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:20,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:20,256 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 43 treesize of output 35 [2022-02-10 03:06:20,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:20,258 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 35 treesize of output 27 [2022-02-10 03:06:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:20,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:20,457 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:20,457 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 [2022-02-10 03:06:20,458 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 9 treesize of output 7 [2022-02-10 03:06:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:20,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119405618] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:20,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:20,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:06:20,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308971388] [2022-02-10 03:06:20,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:20,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:20,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:20,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:20,472 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) [2022-02-10 03:06:22,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:22,485 INFO L93 Difference]: Finished difference Result 1067 states and 3076 transitions. [2022-02-10 03:06:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-10 03:06:22,485 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 [2022-02-10 03:06:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:22,487 INFO L225 Difference]: With dead ends: 1067 [2022-02-10 03:06:22,487 INFO L226 Difference]: Without dead ends: 1062 [2022-02-10 03:06:22,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=778, Invalid=4922, Unknown=0, NotChecked=0, Total=5700 [2022-02-10 03:06:22,487 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 [2022-02-10 03:06:22,487 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] [2022-02-10 03:06:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-02-10 03:06:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 735. [2022-02-10 03:06:22,496 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) [2022-02-10 03:06:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2303 transitions. [2022-02-10 03:06:22,497 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2303 transitions. Word has length 17 [2022-02-10 03:06:22,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:22,497 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2303 transitions. [2022-02-10 03:06:22,497 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) [2022-02-10 03:06:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2303 transitions. [2022-02-10 03:06:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:22,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:22,498 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:22,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:22,698 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 [2022-02-10 03:06:22,698 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:22,699 INFO L85 PathProgramCache]: Analyzing trace with hash 326252913, now seen corresponding path program 196 times [2022-02-10 03:06:22,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:22,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775712174] [2022-02-10 03:06:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:22,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:22,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:22,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775712174] [2022-02-10 03:06:22,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775712174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:22,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964373067] [2022-02-10 03:06:22,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:22,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:22,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:22,792 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) [2022-02-10 03:06:22,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-10 03:06:22,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:22,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:22,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:22,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:22,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:22,953 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:06:22,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:22,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:23,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:23,133 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:23,133 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:06:23,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:23,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964373067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:23,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:23,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:06:23,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068477982] [2022-02-10 03:06:23,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:23,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:23,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:23,148 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) [2022-02-10 03:06:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:24,467 INFO L93 Difference]: Finished difference Result 1042 states and 3053 transitions. [2022-02-10 03:06:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-10 03:06:24,467 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 [2022-02-10 03:06:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:24,468 INFO L225 Difference]: With dead ends: 1042 [2022-02-10 03:06:24,468 INFO L226 Difference]: Without dead ends: 1042 [2022-02-10 03:06:24,469 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 [2022-02-10 03:06:24,469 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 [2022-02-10 03:06:24,469 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] [2022-02-10 03:06:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-02-10 03:06:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 731. [2022-02-10 03:06:24,477 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) [2022-02-10 03:06:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2287 transitions. [2022-02-10 03:06:24,479 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2287 transitions. Word has length 17 [2022-02-10 03:06:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:24,479 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 2287 transitions. [2022-02-10 03:06:24,479 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) [2022-02-10 03:06:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2287 transitions. [2022-02-10 03:06:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:24,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:24,480 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:24,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-02-10 03:06:24,680 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 [2022-02-10 03:06:24,680 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:24,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:24,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1384360395, now seen corresponding path program 197 times [2022-02-10 03:06:24,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:24,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905122501] [2022-02-10 03:06:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:24,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:24,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:24,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905122501] [2022-02-10 03:06:24,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905122501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:24,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737640416] [2022-02-10 03:06:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:24,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:24,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:24,772 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) [2022-02-10 03:06:24,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-10 03:06:24,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:06:24,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:24,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:24,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:24,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:24,950 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:06:24,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:24,952 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:06:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:24,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:25,100 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:25,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:25,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:25,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737640416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:25,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:25,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:06:25,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765701808] [2022-02-10 03:06:25,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:25,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:25,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:25,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:25,114 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) [2022-02-10 03:06:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:26,271 INFO L93 Difference]: Finished difference Result 1045 states and 3096 transitions. [2022-02-10 03:06:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-10 03:06:26,271 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 [2022-02-10 03:06:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:26,273 INFO L225 Difference]: With dead ends: 1045 [2022-02-10 03:06:26,273 INFO L226 Difference]: Without dead ends: 1045 [2022-02-10 03:06:26,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 03:06:26,273 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 [2022-02-10 03:06:26,273 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] [2022-02-10 03:06:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-02-10 03:06:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 746. [2022-02-10 03:06:26,282 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) [2022-02-10 03:06:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2334 transitions. [2022-02-10 03:06:26,283 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2334 transitions. Word has length 17 [2022-02-10 03:06:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:26,283 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2334 transitions. [2022-02-10 03:06:26,283 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) [2022-02-10 03:06:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2334 transitions. [2022-02-10 03:06:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:26,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:26,284 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:26,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:26,499 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 [2022-02-10 03:06:26,500 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:26,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1421201905, now seen corresponding path program 198 times [2022-02-10 03:06:26,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:26,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460665127] [2022-02-10 03:06:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:26,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:26,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:26,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460665127] [2022-02-10 03:06:26,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460665127] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:26,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463009138] [2022-02-10 03:06:26,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:26,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:26,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:26,601 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) [2022-02-10 03:06:26,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-10 03:06:26,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:06:26,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:26,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:26,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:26,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:26,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:26,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:26,782 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:06:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:26,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:26,915 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:26,915 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:06:26,916 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 9 treesize of output 7 [2022-02-10 03:06:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:26,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463009138] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:26,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:26,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:06:26,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950370631] [2022-02-10 03:06:26,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:26,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:26,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:26,929 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) [2022-02-10 03:06:27,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:27,304 INFO L93 Difference]: Finished difference Result 1016 states and 3062 transitions. [2022-02-10 03:06:27,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:06:27,304 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 [2022-02-10 03:06:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:27,306 INFO L225 Difference]: With dead ends: 1016 [2022-02-10 03:06:27,306 INFO L226 Difference]: Without dead ends: 1016 [2022-02-10 03:06:27,306 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 [2022-02-10 03:06:27,306 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-10 03:06:27,306 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] [2022-02-10 03:06:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-02-10 03:06:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 755. [2022-02-10 03:06:27,315 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) [2022-02-10 03:06:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2360 transitions. [2022-02-10 03:06:27,316 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2360 transitions. Word has length 17 [2022-02-10 03:06:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:27,316 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2360 transitions. [2022-02-10 03:06:27,316 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) [2022-02-10 03:06:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2360 transitions. [2022-02-10 03:06:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:27,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:27,317 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:27,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:27,517 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 [2022-02-10 03:06:27,518 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1266244205, now seen corresponding path program 199 times [2022-02-10 03:06:27,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:27,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098550262] [2022-02-10 03:06:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:27,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:27,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:27,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098550262] [2022-02-10 03:06:27,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098550262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:27,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419127753] [2022-02-10 03:06:27,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:27,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:27,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:27,619 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) [2022-02-10 03:06:27,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-10 03:06:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:27,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:27,804 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 29 treesize of output 23 [2022-02-10 03:06:27,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:27,807 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 21 treesize of output 2 [2022-02-10 03:06:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:27,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:27,945 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:27,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:27,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:27,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419127753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:27,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:27,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:06:27,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542725675] [2022-02-10 03:06:27,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:27,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:27,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:27,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:27,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:27,960 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) [2022-02-10 03:06:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:28,346 INFO L93 Difference]: Finished difference Result 1014 states and 3056 transitions. [2022-02-10 03:06:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:06:28,346 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 [2022-02-10 03:06:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:28,348 INFO L225 Difference]: With dead ends: 1014 [2022-02-10 03:06:28,348 INFO L226 Difference]: Without dead ends: 1014 [2022-02-10 03:06:28,348 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 [2022-02-10 03:06:28,348 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 [2022-02-10 03:06:28,348 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] [2022-02-10 03:06:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-02-10 03:06:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 750. [2022-02-10 03:06:28,357 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) [2022-02-10 03:06:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2345 transitions. [2022-02-10 03:06:28,358 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2345 transitions. Word has length 17 [2022-02-10 03:06:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:28,358 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2345 transitions. [2022-02-10 03:06:28,358 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) [2022-02-10 03:06:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2345 transitions. [2022-02-10 03:06:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:28,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:28,359 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:28,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-02-10 03:06:28,559 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 [2022-02-10 03:06:28,559 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:28,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:28,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1800680011, now seen corresponding path program 200 times [2022-02-10 03:06:28,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:28,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986037566] [2022-02-10 03:06:28,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:28,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:28,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:28,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986037566] [2022-02-10 03:06:28,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986037566] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:28,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327772039] [2022-02-10 03:06:28,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:28,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:28,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:28,653 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) [2022-02-10 03:06:28,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-10 03:06:28,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:28,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:28,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:28,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:28,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:28,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:28,824 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 21 treesize of output 2 [2022-02-10 03:06:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:28,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:28,944 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:28,944 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:06:28,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:28,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327772039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:28,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:28,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:06:28,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89010804] [2022-02-10 03:06:28,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:28,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:28,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:28,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:28,959 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) [2022-02-10 03:06:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:29,231 INFO L93 Difference]: Finished difference Result 995 states and 3025 transitions. [2022-02-10 03:06:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:06:29,231 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 [2022-02-10 03:06:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:29,232 INFO L225 Difference]: With dead ends: 995 [2022-02-10 03:06:29,232 INFO L226 Difference]: Without dead ends: 995 [2022-02-10 03:06:29,232 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 [2022-02-10 03:06:29,232 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 [2022-02-10 03:06:29,232 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] [2022-02-10 03:06:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-02-10 03:06:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 753. [2022-02-10 03:06:29,240 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) [2022-02-10 03:06:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2354 transitions. [2022-02-10 03:06:29,242 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2354 transitions. Word has length 17 [2022-02-10 03:06:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:29,242 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2354 transitions. [2022-02-10 03:06:29,242 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) [2022-02-10 03:06:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2354 transitions. [2022-02-10 03:06:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:29,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:29,243 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:29,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-02-10 03:06:29,443 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 [2022-02-10 03:06:29,443 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:29,444 INFO L85 PathProgramCache]: Analyzing trace with hash -193158825, now seen corresponding path program 201 times [2022-02-10 03:06:29,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:29,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827030923] [2022-02-10 03:06:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:29,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:29,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:29,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827030923] [2022-02-10 03:06:29,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827030923] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:29,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683357981] [2022-02-10 03:06:29,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:29,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:29,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:29,556 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) [2022-02-10 03:06:29,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-10 03:06:29,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:06:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:29,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:29,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:29,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:29,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:29,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:29,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:29,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:29,895 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:29,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:29,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:29,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683357981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:29,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:29,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:06:29,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812090599] [2022-02-10 03:06:29,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:29,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:29,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:29,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:29,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:29,910 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) [2022-02-10 03:06:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:30,202 INFO L93 Difference]: Finished difference Result 998 states and 3024 transitions. [2022-02-10 03:06:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:06:30,202 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 [2022-02-10 03:06:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:30,204 INFO L225 Difference]: With dead ends: 998 [2022-02-10 03:06:30,204 INFO L226 Difference]: Without dead ends: 998 [2022-02-10 03:06:30,204 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 [2022-02-10 03:06:30,204 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 [2022-02-10 03:06:30,204 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] [2022-02-10 03:06:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-02-10 03:06:30,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 753. [2022-02-10 03:06:30,214 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) [2022-02-10 03:06:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2354 transitions. [2022-02-10 03:06:30,215 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2354 transitions. Word has length 17 [2022-02-10 03:06:30,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:30,215 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2354 transitions. [2022-02-10 03:06:30,215 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) [2022-02-10 03:06:30,215 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2354 transitions. [2022-02-10 03:06:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:30,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:30,216 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:30,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:30,432 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 [2022-02-10 03:06:30,432 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1535888509, now seen corresponding path program 202 times [2022-02-10 03:06:30,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:30,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222840467] [2022-02-10 03:06:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:30,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:30,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:30,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222840467] [2022-02-10 03:06:30,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222840467] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:30,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856706631] [2022-02-10 03:06:30,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:30,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:30,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:30,532 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) [2022-02-10 03:06:30,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-10 03:06:30,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:30,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:30,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:30,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:30,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:30,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:30,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:30,712 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 21 treesize of output 2 [2022-02-10 03:06:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:30,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:30,834 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:06:30,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:30,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:30,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856706631] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:30,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:30,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:06:30,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749909298] [2022-02-10 03:06:30,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:30,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:30,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:30,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:30,849 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) [2022-02-10 03:06:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:31,129 INFO L93 Difference]: Finished difference Result 998 states and 3022 transitions. [2022-02-10 03:06:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:06:31,129 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 [2022-02-10 03:06:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:31,131 INFO L225 Difference]: With dead ends: 998 [2022-02-10 03:06:31,131 INFO L226 Difference]: Without dead ends: 998 [2022-02-10 03:06:31,131 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 [2022-02-10 03:06:31,131 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 [2022-02-10 03:06:31,131 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] [2022-02-10 03:06:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-02-10 03:06:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 752. [2022-02-10 03:06:31,139 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) [2022-02-10 03:06:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2351 transitions. [2022-02-10 03:06:31,141 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2351 transitions. Word has length 17 [2022-02-10 03:06:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:31,141 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2351 transitions. [2022-02-10 03:06:31,141 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) [2022-02-10 03:06:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2351 transitions. [2022-02-10 03:06:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:31,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:31,142 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:31,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-02-10 03:06:31,342 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 [2022-02-10 03:06:31,342 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:31,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:31,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1235007863, now seen corresponding path program 203 times [2022-02-10 03:06:31,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:31,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737594276] [2022-02-10 03:06:31,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:31,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:31,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:31,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737594276] [2022-02-10 03:06:31,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737594276] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:31,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141191352] [2022-02-10 03:06:31,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:31,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:31,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:31,440 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) [2022-02-10 03:06:31,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-10 03:06:31,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:06:31,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:31,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:31,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:31,584 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 [2022-02-10 03:06:31,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:31,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:31,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:31,590 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 [2022-02-10 03:06:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:31,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:31,696 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:06:31,697 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 [2022-02-10 03:06:31,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:31,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141191352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:31,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:31,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:31,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456235016] [2022-02-10 03:06:31,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:31,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:31,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:31,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:31,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:31,724 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) [2022-02-10 03:06:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:32,186 INFO L93 Difference]: Finished difference Result 981 states and 2875 transitions. [2022-02-10 03:06:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:06:32,186 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 [2022-02-10 03:06:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:32,188 INFO L225 Difference]: With dead ends: 981 [2022-02-10 03:06:32,188 INFO L226 Difference]: Without dead ends: 981 [2022-02-10 03:06:32,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:06:32,188 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:32,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 156 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:06:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-02-10 03:06:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 802. [2022-02-10 03:06:32,198 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) [2022-02-10 03:06:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2531 transitions. [2022-02-10 03:06:32,199 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2531 transitions. Word has length 17 [2022-02-10 03:06:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:32,199 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 2531 transitions. [2022-02-10 03:06:32,199 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) [2022-02-10 03:06:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2531 transitions. [2022-02-10 03:06:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:32,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:32,200 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:32,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-02-10 03:06:32,400 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 [2022-02-10 03:06:32,401 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:32,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:32,401 INFO L85 PathProgramCache]: Analyzing trace with hash 315307155, now seen corresponding path program 204 times [2022-02-10 03:06:32,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:32,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385314787] [2022-02-10 03:06:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:32,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:32,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:32,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385314787] [2022-02-10 03:06:32,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385314787] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:32,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096596053] [2022-02-10 03:06:32,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:32,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:32,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:32,494 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) [2022-02-10 03:06:32,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-10 03:06:32,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:06:32,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:32,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:32,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:32,641 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 39 treesize of output 33 [2022-02-10 03:06:32,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:32,642 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 33 treesize of output 27 [2022-02-10 03:06:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:32,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:32,735 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:06:32,736 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 42 treesize of output 33 [2022-02-10 03:06:32,737 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 21 treesize of output 13 [2022-02-10 03:06:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:32,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096596053] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:32,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:32,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:32,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795275826] [2022-02-10 03:06:32,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:32,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:32,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:32,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:32,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:32,764 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) [2022-02-10 03:06:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:33,214 INFO L93 Difference]: Finished difference Result 922 states and 2751 transitions. [2022-02-10 03:06:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:06:33,214 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 [2022-02-10 03:06:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:33,215 INFO L225 Difference]: With dead ends: 922 [2022-02-10 03:06:33,215 INFO L226 Difference]: Without dead ends: 918 [2022-02-10 03:06:33,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:06:33,216 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:33,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 118 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:06:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-02-10 03:06:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 804. [2022-02-10 03:06:33,224 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) [2022-02-10 03:06:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2526 transitions. [2022-02-10 03:06:33,226 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2526 transitions. Word has length 17 [2022-02-10 03:06:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:33,226 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2526 transitions. [2022-02-10 03:06:33,226 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) [2022-02-10 03:06:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2526 transitions. [2022-02-10 03:06:33,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:33,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:33,227 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:33,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-02-10 03:06:33,427 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 [2022-02-10 03:06:33,427 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:33,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:33,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1242738261, now seen corresponding path program 205 times [2022-02-10 03:06:33,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:33,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396719645] [2022-02-10 03:06:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:33,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:33,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:33,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396719645] [2022-02-10 03:06:33,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396719645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:33,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684951686] [2022-02-10 03:06:33,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:33,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:33,512 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) [2022-02-10 03:06:33,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-10 03:06:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:33,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:33,628 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 [2022-02-10 03:06:33,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:33,630 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 [2022-02-10 03:06:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:33,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:33,778 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:06:33,778 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:06:33,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:33,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684951686] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:33,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:33,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:33,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056212175] [2022-02-10 03:06:33,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:33,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:33,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:33,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:33,802 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) [2022-02-10 03:06:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:34,261 INFO L93 Difference]: Finished difference Result 1028 states and 2954 transitions. [2022-02-10 03:06:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:06:34,261 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 [2022-02-10 03:06:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:34,262 INFO L225 Difference]: With dead ends: 1028 [2022-02-10 03:06:34,263 INFO L226 Difference]: Without dead ends: 1027 [2022-02-10 03:06:34,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:06:34,263 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:34,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 120 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:06:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-02-10 03:06:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 813. [2022-02-10 03:06:34,277 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) [2022-02-10 03:06:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2560 transitions. [2022-02-10 03:06:34,278 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2560 transitions. Word has length 17 [2022-02-10 03:06:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:34,279 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 2560 transitions. [2022-02-10 03:06:34,279 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) [2022-02-10 03:06:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2560 transitions. [2022-02-10 03:06:34,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:34,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:34,280 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:34,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-02-10 03:06:34,480 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 [2022-02-10 03:06:34,480 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2044354489, now seen corresponding path program 206 times [2022-02-10 03:06:34,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:34,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108336441] [2022-02-10 03:06:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:34,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:34,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:34,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108336441] [2022-02-10 03:06:34,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108336441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:34,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601180277] [2022-02-10 03:06:34,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:34,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:34,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:34,567 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) [2022-02-10 03:06:34,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-10 03:06:34,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:34,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:34,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:34,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:34,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:34,684 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 43 treesize of output 35 [2022-02-10 03:06:34,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:34,685 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 35 treesize of output 27 [2022-02-10 03:06:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:34,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:34,812 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:06:34,812 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:06:34,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:34,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601180277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:34,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:34,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:34,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218474953] [2022-02-10 03:06:34,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:34,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:34,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:34,841 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) [2022-02-10 03:06:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:35,479 INFO L93 Difference]: Finished difference Result 994 states and 2907 transitions. [2022-02-10 03:06:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:06:35,479 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 [2022-02-10 03:06:35,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:35,481 INFO L225 Difference]: With dead ends: 994 [2022-02-10 03:06:35,481 INFO L226 Difference]: Without dead ends: 991 [2022-02-10 03:06:35,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 03:06:35,481 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 [2022-02-10 03:06:35,481 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] [2022-02-10 03:06:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-02-10 03:06:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 827. [2022-02-10 03:06:35,490 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) [2022-02-10 03:06:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2599 transitions. [2022-02-10 03:06:35,492 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2599 transitions. Word has length 17 [2022-02-10 03:06:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:35,492 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 2599 transitions. [2022-02-10 03:06:35,492 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) [2022-02-10 03:06:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2599 transitions. [2022-02-10 03:06:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:35,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:35,493 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:35,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-02-10 03:06:35,693 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 [2022-02-10 03:06:35,693 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:35,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:35,694 INFO L85 PathProgramCache]: Analyzing trace with hash -532269101, now seen corresponding path program 207 times [2022-02-10 03:06:35,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:35,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766287454] [2022-02-10 03:06:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:35,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:35,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:35,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766287454] [2022-02-10 03:06:35,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766287454] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:35,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588611035] [2022-02-10 03:06:35,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:35,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:35,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:35,791 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) [2022-02-10 03:06:35,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-10 03:06:35,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:06:35,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:35,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:35,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:35,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:35,907 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 43 treesize of output 35 [2022-02-10 03:06:35,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:35,909 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 35 treesize of output 27 [2022-02-10 03:06:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:35,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:36,037 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:06:36,037 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 42 treesize of output 33 [2022-02-10 03:06:36,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:36,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588611035] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:36,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:36,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:06:36,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417938288] [2022-02-10 03:06:36,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:36,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:36,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:36,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:36,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:36,071 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) [2022-02-10 03:06:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:36,584 INFO L93 Difference]: Finished difference Result 976 states and 2863 transitions. [2022-02-10 03:06:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:06:36,585 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 [2022-02-10 03:06:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:36,586 INFO L225 Difference]: With dead ends: 976 [2022-02-10 03:06:36,586 INFO L226 Difference]: Without dead ends: 976 [2022-02-10 03:06:36,586 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 [2022-02-10 03:06:36,587 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:06:36,587 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] [2022-02-10 03:06:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-02-10 03:06:36,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 805. [2022-02-10 03:06:36,595 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) [2022-02-10 03:06:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2518 transitions. [2022-02-10 03:06:36,596 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2518 transitions. Word has length 17 [2022-02-10 03:06:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:36,597 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 2518 transitions. [2022-02-10 03:06:36,597 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) [2022-02-10 03:06:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2518 transitions. [2022-02-10 03:06:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:36,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:36,598 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:36,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-02-10 03:06:36,798 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 [2022-02-10 03:06:36,798 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:36,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1360854451, now seen corresponding path program 208 times [2022-02-10 03:06:36,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:36,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650956629] [2022-02-10 03:06:36,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:36,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:36,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:36,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650956629] [2022-02-10 03:06:36,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650956629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:36,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548214716] [2022-02-10 03:06:36,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:36,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:36,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:36,885 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) [2022-02-10 03:06:36,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-10 03:06:36,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:37,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:37,003 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 [2022-02-10 03:06:37,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:37,005 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 [2022-02-10 03:06:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:37,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:37,137 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:06:37,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:37,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:37,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548214716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:37,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:37,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:37,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799616509] [2022-02-10 03:06:37,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:37,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:37,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:37,166 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) [2022-02-10 03:06:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:37,978 INFO L93 Difference]: Finished difference Result 996 states and 2876 transitions. [2022-02-10 03:06:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-10 03:06:37,979 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 [2022-02-10 03:06:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:37,980 INFO L225 Difference]: With dead ends: 996 [2022-02-10 03:06:37,980 INFO L226 Difference]: Without dead ends: 993 [2022-02-10 03:06:37,980 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 [2022-02-10 03:06:37,981 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:37,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 184 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:06:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-02-10 03:06:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 821. [2022-02-10 03:06:37,989 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) [2022-02-10 03:06:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2569 transitions. [2022-02-10 03:06:37,991 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2569 transitions. Word has length 17 [2022-02-10 03:06:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:37,991 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 2569 transitions. [2022-02-10 03:06:37,991 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) [2022-02-10 03:06:37,991 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2569 transitions. [2022-02-10 03:06:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:37,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:37,992 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:38,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:38,192 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 [2022-02-10 03:06:38,192 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:38,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1205065511, now seen corresponding path program 209 times [2022-02-10 03:06:38,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:38,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652588601] [2022-02-10 03:06:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:38,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:38,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:38,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652588601] [2022-02-10 03:06:38,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652588601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:38,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126899184] [2022-02-10 03:06:38,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:38,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:38,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:38,278 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) [2022-02-10 03:06:38,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-10 03:06:38,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:06:38,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:38,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:38,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:38,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:38,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:38,456 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-10 03:06:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:38,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:38,558 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:06:38,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:38,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:38,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126899184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:38,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:38,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:38,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982565336] [2022-02-10 03:06:38,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:38,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:38,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:38,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:38,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:38,592 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) [2022-02-10 03:06:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:39,067 INFO L93 Difference]: Finished difference Result 942 states and 2793 transitions. [2022-02-10 03:06:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:06:39,068 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 [2022-02-10 03:06:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:39,069 INFO L225 Difference]: With dead ends: 942 [2022-02-10 03:06:39,069 INFO L226 Difference]: Without dead ends: 938 [2022-02-10 03:06:39,069 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 [2022-02-10 03:06:39,069 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:39,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 108 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 716 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-02-10 03:06:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-02-10 03:06:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 823. [2022-02-10 03:06:39,078 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) [2022-02-10 03:06:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2565 transitions. [2022-02-10 03:06:39,079 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2565 transitions. Word has length 17 [2022-02-10 03:06:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:39,080 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 2565 transitions. [2022-02-10 03:06:39,080 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) [2022-02-10 03:06:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2565 transitions. [2022-02-10 03:06:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:39,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:39,081 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:39,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-02-10 03:06:39,281 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 [2022-02-10 03:06:39,281 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash 562679891, now seen corresponding path program 210 times [2022-02-10 03:06:39,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:39,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328724624] [2022-02-10 03:06:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:39,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:39,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:39,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328724624] [2022-02-10 03:06:39,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328724624] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:39,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089799822] [2022-02-10 03:06:39,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:39,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:39,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:39,364 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) [2022-02-10 03:06:39,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-10 03:06:39,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:06:39,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:39,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:39,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:39,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:39,503 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 29 treesize of output 23 [2022-02-10 03:06:39,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:39,505 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:06:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:39,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:39,600 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:06:39,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:39,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:39,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089799822] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:39,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:39,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:39,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937794840] [2022-02-10 03:06:39,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:39,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:39,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:39,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:39,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:39,629 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) [2022-02-10 03:06:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:40,075 INFO L93 Difference]: Finished difference Result 1022 states and 2952 transitions. [2022-02-10 03:06:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:06:40,076 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 [2022-02-10 03:06:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:40,077 INFO L225 Difference]: With dead ends: 1022 [2022-02-10 03:06:40,077 INFO L226 Difference]: Without dead ends: 1022 [2022-02-10 03:06:40,077 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 [2022-02-10 03:06:40,077 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 [2022-02-10 03:06:40,077 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] [2022-02-10 03:06:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-02-10 03:06:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 835. [2022-02-10 03:06:40,087 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) [2022-02-10 03:06:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2601 transitions. [2022-02-10 03:06:40,088 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2601 transitions. Word has length 17 [2022-02-10 03:06:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:40,088 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 2601 transitions. [2022-02-10 03:06:40,088 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) [2022-02-10 03:06:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2601 transitions. [2022-02-10 03:06:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:40,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:40,089 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:40,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-02-10 03:06:40,289 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 [2022-02-10 03:06:40,290 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:40,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:40,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2124766219, now seen corresponding path program 211 times [2022-02-10 03:06:40,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:40,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182718988] [2022-02-10 03:06:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:40,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:40,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:40,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182718988] [2022-02-10 03:06:40,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182718988] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:40,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057165005] [2022-02-10 03:06:40,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:40,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:40,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:40,372 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) [2022-02-10 03:06:40,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-10 03:06:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:40,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:40,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:40,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:40,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:40,522 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:06:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:40,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:40,616 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:06:40,616 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:06:40,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:40,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057165005] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:40,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:40,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:40,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444916461] [2022-02-10 03:06:40,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:40,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:40,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:40,640 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) [2022-02-10 03:06:41,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:41,113 INFO L93 Difference]: Finished difference Result 1021 states and 2945 transitions. [2022-02-10 03:06:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:06:41,114 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 [2022-02-10 03:06:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:41,115 INFO L225 Difference]: With dead ends: 1021 [2022-02-10 03:06:41,115 INFO L226 Difference]: Without dead ends: 1021 [2022-02-10 03:06:41,115 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 [2022-02-10 03:06:41,115 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:06:41,115 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] [2022-02-10 03:06:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-02-10 03:06:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 833. [2022-02-10 03:06:41,125 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) [2022-02-10 03:06:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2593 transitions. [2022-02-10 03:06:41,126 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2593 transitions. Word has length 17 [2022-02-10 03:06:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:41,126 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 2593 transitions. [2022-02-10 03:06:41,126 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) [2022-02-10 03:06:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2593 transitions. [2022-02-10 03:06:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:41,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:41,128 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:41,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:41,343 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 [2022-02-10 03:06:41,343 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:41,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1861027465, now seen corresponding path program 212 times [2022-02-10 03:06:41,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:41,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809608381] [2022-02-10 03:06:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:41,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:41,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:41,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809608381] [2022-02-10 03:06:41,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809608381] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:41,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887346987] [2022-02-10 03:06:41,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:41,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:41,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:41,437 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) [2022-02-10 03:06:41,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-10 03:06:41,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:41,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:41,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:41,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:41,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:41,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:41,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:41,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:41,716 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:41,716 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 42 treesize of output 35 [2022-02-10 03:06:41,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:41,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887346987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:41,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:41,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:06:41,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452078308] [2022-02-10 03:06:41,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:41,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:41,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:41,743 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) [2022-02-10 03:06:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:42,363 INFO L93 Difference]: Finished difference Result 983 states and 2896 transitions. [2022-02-10 03:06:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:06:42,363 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 [2022-02-10 03:06:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:42,365 INFO L225 Difference]: With dead ends: 983 [2022-02-10 03:06:42,365 INFO L226 Difference]: Without dead ends: 981 [2022-02-10 03:06:42,365 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 [2022-02-10 03:06:42,365 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:06:42,365 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] [2022-02-10 03:06:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-02-10 03:06:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 845. [2022-02-10 03:06:42,374 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) [2022-02-10 03:06:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2628 transitions. [2022-02-10 03:06:42,375 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2628 transitions. Word has length 17 [2022-02-10 03:06:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:42,375 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2628 transitions. [2022-02-10 03:06:42,375 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) [2022-02-10 03:06:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2628 transitions. [2022-02-10 03:06:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:42,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:42,377 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:42,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:42,592 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 [2022-02-10 03:06:42,592 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash -131980131, now seen corresponding path program 213 times [2022-02-10 03:06:42,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:42,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892221252] [2022-02-10 03:06:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:42,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:42,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:42,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892221252] [2022-02-10 03:06:42,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892221252] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:42,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658261278] [2022-02-10 03:06:42,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:42,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:42,681 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) [2022-02-10 03:06:42,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-10 03:06:42,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:06:42,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:42,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:42,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:42,855 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-10 03:06:42,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:42,857 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-10 03:06:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:42,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:42,979 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:42,979 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:06:42,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:43,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658261278] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:43,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:43,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:06:43,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137995053] [2022-02-10 03:06:43,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:43,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:43,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:43,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:43,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:43,009 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) [2022-02-10 03:06:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:43,392 INFO L93 Difference]: Finished difference Result 927 states and 2804 transitions. [2022-02-10 03:06:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:06:43,393 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 [2022-02-10 03:06:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:43,394 INFO L225 Difference]: With dead ends: 927 [2022-02-10 03:06:43,394 INFO L226 Difference]: Without dead ends: 923 [2022-02-10 03:06:43,394 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 [2022-02-10 03:06:43,394 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 [2022-02-10 03:06:43,395 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] [2022-02-10 03:06:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-02-10 03:06:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 845. [2022-02-10 03:06:43,403 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) [2022-02-10 03:06:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2625 transitions. [2022-02-10 03:06:43,405 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2625 transitions. Word has length 17 [2022-02-10 03:06:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:43,405 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2625 transitions. [2022-02-10 03:06:43,405 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) [2022-02-10 03:06:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2625 transitions. [2022-02-10 03:06:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:43,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:43,406 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:43,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-02-10 03:06:43,619 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 [2022-02-10 03:06:43,619 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:43,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:43,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1928879671, now seen corresponding path program 214 times [2022-02-10 03:06:43,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:43,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803353006] [2022-02-10 03:06:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:43,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:43,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:43,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803353006] [2022-02-10 03:06:43,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803353006] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:43,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152321351] [2022-02-10 03:06:43,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:43,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:43,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:43,715 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) [2022-02-10 03:06:43,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-10 03:06:43,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:43,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:43,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:43,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:43,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:43,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:43,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:43,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:43,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:44,000 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:44,000 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 42 treesize of output 35 [2022-02-10 03:06:44,002 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 21 treesize of output 13 [2022-02-10 03:06:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:44,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152321351] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:44,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:44,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:44,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328495263] [2022-02-10 03:06:44,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:44,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:44,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:44,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:44,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:44,027 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) [2022-02-10 03:06:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:44,272 INFO L93 Difference]: Finished difference Result 925 states and 2799 transitions. [2022-02-10 03:06:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:06:44,272 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 [2022-02-10 03:06:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:44,273 INFO L225 Difference]: With dead ends: 925 [2022-02-10 03:06:44,273 INFO L226 Difference]: Without dead ends: 919 [2022-02-10 03:06:44,274 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 [2022-02-10 03:06:44,274 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 [2022-02-10 03:06:44,274 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] [2022-02-10 03:06:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-02-10 03:06:44,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 846. [2022-02-10 03:06:44,282 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) [2022-02-10 03:06:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2622 transitions. [2022-02-10 03:06:44,284 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2622 transitions. Word has length 17 [2022-02-10 03:06:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:44,284 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 2622 transitions. [2022-02-10 03:06:44,284 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) [2022-02-10 03:06:44,284 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2622 transitions. [2022-02-10 03:06:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:44,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:44,285 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:44,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-02-10 03:06:44,485 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 [2022-02-10 03:06:44,485 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash 146360275, now seen corresponding path program 215 times [2022-02-10 03:06:44,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:44,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422643131] [2022-02-10 03:06:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:44,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:44,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:44,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422643131] [2022-02-10 03:06:44,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422643131] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:44,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974970979] [2022-02-10 03:06:44,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:44,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:44,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:44,571 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) [2022-02-10 03:06:44,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-10 03:06:44,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:06:44,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:44,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:44,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:44,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:44,720 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 29 treesize of output 23 [2022-02-10 03:06:44,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:44,722 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 [2022-02-10 03:06:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:44,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:44,825 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:44,825 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 30 treesize of output 27 [2022-02-10 03:06:44,826 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 13 treesize of output 9 [2022-02-10 03:06:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:44,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974970979] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:44,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:44,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:44,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877359014] [2022-02-10 03:06:44,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:44,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:44,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:44,847 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) [2022-02-10 03:06:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:45,099 INFO L93 Difference]: Finished difference Result 952 states and 2852 transitions. [2022-02-10 03:06:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:06:45,099 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 [2022-02-10 03:06:45,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:45,100 INFO L225 Difference]: With dead ends: 952 [2022-02-10 03:06:45,100 INFO L226 Difference]: Without dead ends: 952 [2022-02-10 03:06:45,100 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 [2022-02-10 03:06:45,101 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 [2022-02-10 03:06:45,101 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] [2022-02-10 03:06:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-02-10 03:06:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 844. [2022-02-10 03:06:45,109 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) [2022-02-10 03:06:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2616 transitions. [2022-02-10 03:06:45,111 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2616 transitions. Word has length 17 [2022-02-10 03:06:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:45,111 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 2616 transitions. [2022-02-10 03:06:45,111 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) [2022-02-10 03:06:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2616 transitions. [2022-02-10 03:06:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:45,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:45,112 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:45,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-02-10 03:06:45,312 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 [2022-02-10 03:06:45,312 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:45,313 INFO L85 PathProgramCache]: Analyzing trace with hash -267672943, now seen corresponding path program 216 times [2022-02-10 03:06:45,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:45,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766164200] [2022-02-10 03:06:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:45,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:45,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:45,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766164200] [2022-02-10 03:06:45,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766164200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:45,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729633392] [2022-02-10 03:06:45,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:45,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:45,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:45,413 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) [2022-02-10 03:06:45,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-10 03:06:45,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:06:45,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:45,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:45,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:45,558 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:06:45,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:45,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:45,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:45,740 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:45,740 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:06:45,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:45,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729633392] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:45,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:45,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:06:45,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953835188] [2022-02-10 03:06:45,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:45,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:45,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:45,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:45,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:45,764 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) [2022-02-10 03:06:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:46,022 INFO L93 Difference]: Finished difference Result 974 states and 2878 transitions. [2022-02-10 03:06:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:06:46,022 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 [2022-02-10 03:06:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:46,023 INFO L225 Difference]: With dead ends: 974 [2022-02-10 03:06:46,023 INFO L226 Difference]: Without dead ends: 974 [2022-02-10 03:06:46,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:06:46,024 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 97 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:06:46,024 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] [2022-02-10 03:06:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-02-10 03:06:46,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 853. [2022-02-10 03:06:46,037 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) [2022-02-10 03:06:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2647 transitions. [2022-02-10 03:06:46,038 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2647 transitions. Word has length 17 [2022-02-10 03:06:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:46,038 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2647 transitions. [2022-02-10 03:06:46,038 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) [2022-02-10 03:06:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2647 transitions. [2022-02-10 03:06:46,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:46,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:46,039 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:46,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-02-10 03:06:46,240 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 [2022-02-10 03:06:46,240 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash 533943285, now seen corresponding path program 217 times [2022-02-10 03:06:46,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:46,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717290464] [2022-02-10 03:06:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:46,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:46,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:46,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717290464] [2022-02-10 03:06:46,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717290464] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:46,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282716880] [2022-02-10 03:06:46,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:46,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:46,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:46,331 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) [2022-02-10 03:06:46,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-10 03:06:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:46,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:46,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:46,471 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 43 treesize of output 35 [2022-02-10 03:06:46,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:46,473 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 35 treesize of output 27 [2022-02-10 03:06:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:46,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:46,641 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:46,641 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:06:46,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:46,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282716880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:46,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:46,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:06:46,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52797673] [2022-02-10 03:06:46,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:46,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:46,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:46,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:46,660 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) [2022-02-10 03:06:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:48,103 INFO L93 Difference]: Finished difference Result 1020 states and 2958 transitions. [2022-02-10 03:06:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-10 03:06:48,103 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 [2022-02-10 03:06:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:48,105 INFO L225 Difference]: With dead ends: 1020 [2022-02-10 03:06:48,105 INFO L226 Difference]: Without dead ends: 1014 [2022-02-10 03:06:48,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=463, Invalid=3443, Unknown=0, NotChecked=0, Total=3906 [2022-02-10 03:06:48,105 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 [2022-02-10 03:06:48,105 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] [2022-02-10 03:06:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-02-10 03:06:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 869. [2022-02-10 03:06:48,114 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) [2022-02-10 03:06:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2698 transitions. [2022-02-10 03:06:48,115 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2698 transitions. Word has length 17 [2022-02-10 03:06:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:48,115 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2698 transitions. [2022-02-10 03:06:48,115 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) [2022-02-10 03:06:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2698 transitions. [2022-02-10 03:06:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:48,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:48,117 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:48,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-02-10 03:06:48,317 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 [2022-02-10 03:06:48,317 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:48,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:48,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2042680305, now seen corresponding path program 218 times [2022-02-10 03:06:48,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:48,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678733862] [2022-02-10 03:06:48,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:48,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:48,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:48,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678733862] [2022-02-10 03:06:48,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678733862] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:48,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827889362] [2022-02-10 03:06:48,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:48,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:48,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:48,409 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) [2022-02-10 03:06:48,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-10 03:06:48,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:48,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:48,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:48,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:48,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:48,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:48,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:48,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:48,711 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:48,711 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 30 treesize of output 27 [2022-02-10 03:06:48,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:48,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827889362] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:48,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:48,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:06:48,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014516686] [2022-02-10 03:06:48,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:48,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:48,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:48,730 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) [2022-02-10 03:06:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:49,698 INFO L93 Difference]: Finished difference Result 1010 states and 2956 transitions. [2022-02-10 03:06:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-10 03:06:49,698 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 [2022-02-10 03:06:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:49,700 INFO L225 Difference]: With dead ends: 1010 [2022-02-10 03:06:49,700 INFO L226 Difference]: Without dead ends: 1010 [2022-02-10 03:06:49,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-02-10 03:06:49,700 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 [2022-02-10 03:06:49,700 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] [2022-02-10 03:06:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-02-10 03:06:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 852. [2022-02-10 03:06:49,709 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) [2022-02-10 03:06:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2640 transitions. [2022-02-10 03:06:49,710 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2640 transitions. Word has length 17 [2022-02-10 03:06:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:49,710 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2640 transitions. [2022-02-10 03:06:49,711 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) [2022-02-10 03:06:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2640 transitions. [2022-02-10 03:06:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:49,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:49,712 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:49,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-02-10 03:06:49,912 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 [2022-02-10 03:06:49,912 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:49,912 INFO L85 PathProgramCache]: Analyzing trace with hash 541673683, now seen corresponding path program 219 times [2022-02-10 03:06:49,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:49,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69321208] [2022-02-10 03:06:49,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:49,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:50,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:50,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69321208] [2022-02-10 03:06:50,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69321208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:50,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266000708] [2022-02-10 03:06:50,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:50,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:50,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:50,002 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) [2022-02-10 03:06:50,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-10 03:06:50,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:06:50,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:50,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:50,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:50,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:50,178 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 29 treesize of output 23 [2022-02-10 03:06:50,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:50,180 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:06:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:50,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:50,311 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:50,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:50,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:50,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266000708] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:50,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:50,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:06:50,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746639723] [2022-02-10 03:06:50,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:50,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:50,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:50,330 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) [2022-02-10 03:06:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:51,155 INFO L93 Difference]: Finished difference Result 992 states and 2932 transitions. [2022-02-10 03:06:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:06:51,156 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 [2022-02-10 03:06:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:51,157 INFO L225 Difference]: With dead ends: 992 [2022-02-10 03:06:51,157 INFO L226 Difference]: Without dead ends: 992 [2022-02-10 03:06:51,157 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 [2022-02-10 03:06:51,158 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:51,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 50 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 600 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-02-10 03:06:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-02-10 03:06:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 854. [2022-02-10 03:06:51,166 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) [2022-02-10 03:06:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2645 transitions. [2022-02-10 03:06:51,168 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2645 transitions. Word has length 17 [2022-02-10 03:06:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:51,168 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 2645 transitions. [2022-02-10 03:06:51,168 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) [2022-02-10 03:06:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2645 transitions. [2022-02-10 03:06:51,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:51,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:51,169 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:51,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:51,370 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 [2022-02-10 03:06:51,370 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:51,371 INFO L85 PathProgramCache]: Analyzing trace with hash -947731313, now seen corresponding path program 220 times [2022-02-10 03:06:51,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:51,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724760455] [2022-02-10 03:06:51,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:51,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:51,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:51,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724760455] [2022-02-10 03:06:51,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724760455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:51,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68488382] [2022-02-10 03:06:51,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:51,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:51,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:51,468 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) [2022-02-10 03:06:51,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-10 03:06:51,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:51,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:51,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:51,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:51,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:51,654 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 [2022-02-10 03:06:51,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:51,657 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 [2022-02-10 03:06:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:51,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:51,773 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:51,773 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:06:51,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:51,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68488382] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:51,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:51,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:06:51,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454023571] [2022-02-10 03:06:51,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:51,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:51,792 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) [2022-02-10 03:06:52,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:52,083 INFO L93 Difference]: Finished difference Result 972 states and 2920 transitions. [2022-02-10 03:06:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:06:52,083 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 [2022-02-10 03:06:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:52,084 INFO L225 Difference]: With dead ends: 972 [2022-02-10 03:06:52,084 INFO L226 Difference]: Without dead ends: 972 [2022-02-10 03:06:52,084 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 [2022-02-10 03:06:52,084 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-10 03:06:52,085 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] [2022-02-10 03:06:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-02-10 03:06:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 854. [2022-02-10 03:06:52,093 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) [2022-02-10 03:06:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2644 transitions. [2022-02-10 03:06:52,094 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2644 transitions. Word has length 17 [2022-02-10 03:06:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:52,094 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 2644 transitions. [2022-02-10 03:06:52,095 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) [2022-02-10 03:06:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2644 transitions. [2022-02-10 03:06:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:52,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:52,096 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:52,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-02-10 03:06:52,296 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 [2022-02-10 03:06:52,296 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash 125354067, now seen corresponding path program 221 times [2022-02-10 03:06:52,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:52,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19369477] [2022-02-10 03:06:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:52,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:52,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:52,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19369477] [2022-02-10 03:06:52,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19369477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:52,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070061259] [2022-02-10 03:06:52,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:52,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:52,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:52,395 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) [2022-02-10 03:06:52,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-10 03:06:52,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:06:52,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:52,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:52,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:52,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:52,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:52,571 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 [2022-02-10 03:06:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:52,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:52,672 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:52,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:52,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:52,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070061259] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:52,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:52,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:52,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55204744] [2022-02-10 03:06:52,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:52,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:52,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:52,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:52,691 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) [2022-02-10 03:06:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:52,847 INFO L93 Difference]: Finished difference Result 952 states and 2868 transitions. [2022-02-10 03:06:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:06:52,847 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 [2022-02-10 03:06:52,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:52,848 INFO L225 Difference]: With dead ends: 952 [2022-02-10 03:06:52,848 INFO L226 Difference]: Without dead ends: 952 [2022-02-10 03:06:52,848 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 [2022-02-10 03:06:52,849 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 [2022-02-10 03:06:52,849 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] [2022-02-10 03:06:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-02-10 03:06:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 858. [2022-02-10 03:06:52,857 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) [2022-02-10 03:06:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2656 transitions. [2022-02-10 03:06:52,858 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2656 transitions. Word has length 17 [2022-02-10 03:06:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:52,858 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 2656 transitions. [2022-02-10 03:06:52,858 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) [2022-02-10 03:06:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2656 transitions. [2022-02-10 03:06:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:52,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:52,860 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:52,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-02-10 03:06:53,060 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 [2022-02-10 03:06:53,060 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:53,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1732875253, now seen corresponding path program 222 times [2022-02-10 03:06:53,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:53,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320597906] [2022-02-10 03:06:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:53,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:53,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:53,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320597906] [2022-02-10 03:06:53,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320597906] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:53,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795997384] [2022-02-10 03:06:53,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:53,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:53,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:53,150 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) [2022-02-10 03:06:53,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-10 03:06:53,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:06:53,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:53,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:53,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:53,318 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:06:53,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:53,320 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 21 treesize of output 2 [2022-02-10 03:06:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:53,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:53,429 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:53,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:53,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:53,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795997384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:53,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:53,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:06:53,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350476704] [2022-02-10 03:06:53,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:53,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:53,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:53,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:53,448 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) [2022-02-10 03:06:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:53,640 INFO L93 Difference]: Finished difference Result 958 states and 2882 transitions. [2022-02-10 03:06:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:06:53,641 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 [2022-02-10 03:06:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:53,642 INFO L225 Difference]: With dead ends: 958 [2022-02-10 03:06:53,642 INFO L226 Difference]: Without dead ends: 958 [2022-02-10 03:06:53,642 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 [2022-02-10 03:06:53,642 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:53,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 50 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 447 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2022-02-10 03:06:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-02-10 03:06:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 854. [2022-02-10 03:06:53,651 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) [2022-02-10 03:06:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2644 transitions. [2022-02-10 03:06:53,653 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2644 transitions. Word has length 17 [2022-02-10 03:06:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:53,653 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 2644 transitions. [2022-02-10 03:06:53,653 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) [2022-02-10 03:06:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2644 transitions. [2022-02-10 03:06:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:53,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:53,654 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:53,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-02-10 03:06:53,854 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 [2022-02-10 03:06:53,855 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:53,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:53,855 INFO L85 PathProgramCache]: Analyzing trace with hash 150986867, now seen corresponding path program 223 times [2022-02-10 03:06:53,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:53,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502997366] [2022-02-10 03:06:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:53,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:53,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:53,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502997366] [2022-02-10 03:06:53,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502997366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:53,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647331974] [2022-02-10 03:06:53,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:53,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:53,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:53,945 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) [2022-02-10 03:06:53,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-10 03:06:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:53,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:54,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:54,116 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 [2022-02-10 03:06:54,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:54,119 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 7 treesize of output 1 [2022-02-10 03:06:54,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:54,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:54,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:54,231 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:54,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:54,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:54,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647331974] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:54,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:54,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:06:54,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102284130] [2022-02-10 03:06:54,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:54,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:54,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:54,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:54,254 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) [2022-02-10 03:06:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:54,622 INFO L93 Difference]: Finished difference Result 1019 states and 2980 transitions. [2022-02-10 03:06:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:06:54,623 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 [2022-02-10 03:06:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:54,624 INFO L225 Difference]: With dead ends: 1019 [2022-02-10 03:06:54,624 INFO L226 Difference]: Without dead ends: 1019 [2022-02-10 03:06:54,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:06:54,624 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:54,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 150 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:06:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-02-10 03:06:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 880. [2022-02-10 03:06:54,634 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) [2022-02-10 03:06:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2742 transitions. [2022-02-10 03:06:54,635 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2742 transitions. Word has length 17 [2022-02-10 03:06:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:54,635 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 2742 transitions. [2022-02-10 03:06:54,635 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) [2022-02-10 03:06:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2742 transitions. [2022-02-10 03:06:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:54,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:54,636 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:54,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-02-10 03:06:54,837 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 [2022-02-10 03:06:54,837 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:54,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1705035991, now seen corresponding path program 224 times [2022-02-10 03:06:54,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:54,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387541186] [2022-02-10 03:06:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:54,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:54,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:54,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387541186] [2022-02-10 03:06:54,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387541186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:54,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423826443] [2022-02-10 03:06:54,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:54,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:54,926 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) [2022-02-10 03:06:54,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-10 03:06:54,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:54,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:54,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:55,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:55,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:55,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:55,095 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 33 treesize of output 27 [2022-02-10 03:06:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:55,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:55,202 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:55,202 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:06:55,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:55,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423826443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:55,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:55,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:06:55,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200440040] [2022-02-10 03:06:55,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:55,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:55,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:55,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:55,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:55,235 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) [2022-02-10 03:06:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:55,679 INFO L93 Difference]: Finished difference Result 966 states and 2872 transitions. [2022-02-10 03:06:55,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:06:55,679 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 [2022-02-10 03:06:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:55,681 INFO L225 Difference]: With dead ends: 966 [2022-02-10 03:06:55,681 INFO L226 Difference]: Without dead ends: 960 [2022-02-10 03:06:55,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:06:55,681 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:55,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 128 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:06:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-02-10 03:06:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 884. [2022-02-10 03:06:55,690 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) [2022-02-10 03:06:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2743 transitions. [2022-02-10 03:06:55,692 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2743 transitions. Word has length 17 [2022-02-10 03:06:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:55,692 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 2743 transitions. [2022-02-10 03:06:55,692 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) [2022-02-10 03:06:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2743 transitions. [2022-02-10 03:06:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:55,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:55,693 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:55,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-02-10 03:06:55,893 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 [2022-02-10 03:06:55,893 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash 390629205, now seen corresponding path program 225 times [2022-02-10 03:06:55,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:55,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418557691] [2022-02-10 03:06:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:55,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:55,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:55,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418557691] [2022-02-10 03:06:55,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418557691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:55,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489363639] [2022-02-10 03:06:55,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:55,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:55,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:55,987 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) [2022-02-10 03:06:55,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-10 03:06:56,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:06:56,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:56,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:56,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:56,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:56,159 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 [2022-02-10 03:06:56,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:56,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:56,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:56,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:56,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:56,280 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:56,281 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 30 treesize of output 27 [2022-02-10 03:06:56,282 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 13 treesize of output 9 [2022-02-10 03:06:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:56,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489363639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:56,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:56,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:06:56,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815568519] [2022-02-10 03:06:56,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:56,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:56,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:56,303 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) [2022-02-10 03:06:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:57,243 INFO L93 Difference]: Finished difference Result 1107 states and 3200 transitions. [2022-02-10 03:06:57,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:06:57,244 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 [2022-02-10 03:06:57,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:57,245 INFO L225 Difference]: With dead ends: 1107 [2022-02-10 03:06:57,245 INFO L226 Difference]: Without dead ends: 1103 [2022-02-10 03:06:57,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-02-10 03:06:57,246 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:57,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 98 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:06:57,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-02-10 03:06:57,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 912. [2022-02-10 03:06:57,255 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) [2022-02-10 03:06:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2844 transitions. [2022-02-10 03:06:57,257 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2844 transitions. Word has length 17 [2022-02-10 03:06:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:57,257 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2844 transitions. [2022-02-10 03:06:57,257 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) [2022-02-10 03:06:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2844 transitions. [2022-02-10 03:06:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:57,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:57,258 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:57,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-02-10 03:06:57,458 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 [2022-02-10 03:06:57,458 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:57,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:57,459 INFO L85 PathProgramCache]: Analyzing trace with hash -529071503, now seen corresponding path program 226 times [2022-02-10 03:06:57,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:57,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236398898] [2022-02-10 03:06:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:57,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:57,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:57,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236398898] [2022-02-10 03:06:57,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236398898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:57,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52181540] [2022-02-10 03:06:57,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:57,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:57,550 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) [2022-02-10 03:06:57,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-10 03:06:57,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:57,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:57,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:57,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:57,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:57,725 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-10 03:06:57,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:57,726 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-10 03:06:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:57,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:57,842 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:57,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:57,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:57,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52181540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:57,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:57,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:06:57,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915291880] [2022-02-10 03:06:57,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:57,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:57,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:57,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:57,874 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) [2022-02-10 03:06:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:58,414 INFO L93 Difference]: Finished difference Result 995 states and 2978 transitions. [2022-02-10 03:06:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:06:58,414 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 [2022-02-10 03:06:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:58,416 INFO L225 Difference]: With dead ends: 995 [2022-02-10 03:06:58,416 INFO L226 Difference]: Without dead ends: 989 [2022-02-10 03:06:58,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:06:58,416 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 [2022-02-10 03:06:58,416 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] [2022-02-10 03:06:58,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-02-10 03:06:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 916. [2022-02-10 03:06:58,425 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) [2022-02-10 03:06:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 2840 transitions. [2022-02-10 03:06:58,427 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 2840 transitions. Word has length 17 [2022-02-10 03:06:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:58,427 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 2840 transitions. [2022-02-10 03:06:58,427 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) [2022-02-10 03:06:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 2840 transitions. [2022-02-10 03:06:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:06:58,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:58,428 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:58,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-02-10 03:06:58,628 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 [2022-02-10 03:06:58,628 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:06:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash 398359603, now seen corresponding path program 227 times [2022-02-10 03:06:58,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:58,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3816730] [2022-02-10 03:06:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:58,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:58,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:58,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3816730] [2022-02-10 03:06:58,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3816730] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:58,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452673725] [2022-02-10 03:06:58,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:58,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:58,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:58,742 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) [2022-02-10 03:06:58,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-10 03:06:58,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:06:58,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:58,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:06:58,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:58,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:58,884 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 [2022-02-10 03:06:58,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:58,886 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 [2022-02-10 03:06:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:58,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:59,041 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:06:59,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:06:59,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:06:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:06:59,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452673725] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:59,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:59,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:06:59,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902347803] [2022-02-10 03:06:59,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:59,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:59,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:59,064 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) [2022-02-10 03:07:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:00,010 INFO L93 Difference]: Finished difference Result 1155 states and 3239 transitions. [2022-02-10 03:07:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-10 03:07:00,011 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 [2022-02-10 03:07:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:00,012 INFO L225 Difference]: With dead ends: 1155 [2022-02-10 03:07:00,012 INFO L226 Difference]: Without dead ends: 1153 [2022-02-10 03:07:00,013 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 [2022-02-10 03:07:00,013 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 [2022-02-10 03:07:00,013 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] [2022-02-10 03:07:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-02-10 03:07:00,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 916. [2022-02-10 03:07:00,023 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) [2022-02-10 03:07:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 2844 transitions. [2022-02-10 03:07:00,024 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 2844 transitions. Word has length 17 [2022-02-10 03:07:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:00,024 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 2844 transitions. [2022-02-10 03:07:00,024 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) [2022-02-10 03:07:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 2844 transitions. [2022-02-10 03:07:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:00,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:00,026 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:00,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-02-10 03:07:00,226 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 [2022-02-10 03:07:00,226 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:00,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1199975831, now seen corresponding path program 228 times [2022-02-10 03:07:00,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:00,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327065378] [2022-02-10 03:07:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:00,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:00,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:00,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327065378] [2022-02-10 03:07:00,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327065378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:00,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980892374] [2022-02-10 03:07:00,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:00,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:00,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:00,324 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) [2022-02-10 03:07:00,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-10 03:07:00,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:07:00,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:00,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:00,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:00,467 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 43 treesize of output 35 [2022-02-10 03:07:00,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:00,469 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 35 treesize of output 27 [2022-02-10 03:07:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:00,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:00,640 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:00,640 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:07:00,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:00,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980892374] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:00,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:00,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:07:00,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572310674] [2022-02-10 03:07:00,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:00,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:00,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:00,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:00,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:00,667 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) [2022-02-10 03:07:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:01,275 INFO L93 Difference]: Finished difference Result 1063 states and 3095 transitions. [2022-02-10 03:07:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 03:07:01,276 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 [2022-02-10 03:07:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:01,277 INFO L225 Difference]: With dead ends: 1063 [2022-02-10 03:07:01,277 INFO L226 Difference]: Without dead ends: 1059 [2022-02-10 03:07:01,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:07:01,278 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:01,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 88 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:07:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-02-10 03:07:01,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 929. [2022-02-10 03:07:01,288 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) [2022-02-10 03:07:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2878 transitions. [2022-02-10 03:07:01,289 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2878 transitions. Word has length 17 [2022-02-10 03:07:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:01,289 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 2878 transitions. [2022-02-10 03:07:01,289 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) [2022-02-10 03:07:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2878 transitions. [2022-02-10 03:07:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:01,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:01,291 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:01,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-02-10 03:07:01,491 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 [2022-02-10 03:07:01,491 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1376647759, now seen corresponding path program 229 times [2022-02-10 03:07:01,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:01,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555840820] [2022-02-10 03:07:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:01,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:01,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:01,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555840820] [2022-02-10 03:07:01,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555840820] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:01,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409888442] [2022-02-10 03:07:01,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:01,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:01,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:01,586 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) [2022-02-10 03:07:01,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-10 03:07:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:01,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:01,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:01,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:01,729 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 43 treesize of output 35 [2022-02-10 03:07:01,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:01,731 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 35 treesize of output 27 [2022-02-10 03:07:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:01,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:01,872 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:01,872 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:07:01,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:01,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409888442] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:01,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:01,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:07:01,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203342200] [2022-02-10 03:07:01,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:01,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:01,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:01,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:01,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:01,904 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) [2022-02-10 03:07:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:02,451 INFO L93 Difference]: Finished difference Result 1041 states and 3042 transitions. [2022-02-10 03:07:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:07:02,451 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 [2022-02-10 03:07:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:02,453 INFO L225 Difference]: With dead ends: 1041 [2022-02-10 03:07:02,453 INFO L226 Difference]: Without dead ends: 1041 [2022-02-10 03:07:02,453 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 [2022-02-10 03:07:02,453 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:07:02,453 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] [2022-02-10 03:07:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-02-10 03:07:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 896. [2022-02-10 03:07:02,462 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) [2022-02-10 03:07:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2758 transitions. [2022-02-10 03:07:02,464 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2758 transitions. Word has length 17 [2022-02-10 03:07:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:02,464 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2758 transitions. [2022-02-10 03:07:02,464 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) [2022-02-10 03:07:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2758 transitions. [2022-02-10 03:07:02,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:02,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:02,465 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:02,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-02-10 03:07:02,665 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 [2022-02-10 03:07:02,665 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1216001127, now seen corresponding path program 230 times [2022-02-10 03:07:02,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:02,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468261398] [2022-02-10 03:07:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:02,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:02,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:02,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468261398] [2022-02-10 03:07:02,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468261398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:02,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217524040] [2022-02-10 03:07:02,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:02,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:02,746 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) [2022-02-10 03:07:02,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-10 03:07:02,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:02,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:02,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:02,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:02,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:02,872 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 35 treesize of output 27 [2022-02-10 03:07:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:02,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:03,005 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:03,005 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:07:03,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:03,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217524040] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:03,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:03,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:07:03,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780571604] [2022-02-10 03:07:03,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:03,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:03,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:03,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:03,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:03,029 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) [2022-02-10 03:07:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:03,784 INFO L93 Difference]: Finished difference Result 1015 states and 2966 transitions. [2022-02-10 03:07:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-10 03:07:03,784 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 [2022-02-10 03:07:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:03,786 INFO L225 Difference]: With dead ends: 1015 [2022-02-10 03:07:03,786 INFO L226 Difference]: Without dead ends: 1013 [2022-02-10 03:07:03,786 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 [2022-02-10 03:07:03,786 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 [2022-02-10 03:07:03,786 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] [2022-02-10 03:07:03,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-02-10 03:07:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 896. [2022-02-10 03:07:03,796 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) [2022-02-10 03:07:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2749 transitions. [2022-02-10 03:07:03,797 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2749 transitions. Word has length 17 [2022-02-10 03:07:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:03,797 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2749 transitions. [2022-02-10 03:07:03,797 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) [2022-02-10 03:07:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2749 transitions. [2022-02-10 03:07:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:03,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:03,798 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:03,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:03,999 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 [2022-02-10 03:07:03,999 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash -17960013, now seen corresponding path program 231 times [2022-02-10 03:07:03,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:03,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468579617] [2022-02-10 03:07:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:03,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:04,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:04,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468579617] [2022-02-10 03:07:04,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468579617] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:04,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134781626] [2022-02-10 03:07:04,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:04,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:04,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:04,083 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) [2022-02-10 03:07:04,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-10 03:07:04,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:07:04,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:04,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:04,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:04,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:04,208 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 [2022-02-10 03:07:04,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:04,209 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 [2022-02-10 03:07:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:04,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:04,338 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:04,338 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:07:04,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:04,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134781626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:04,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:04,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:07:04,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973264818] [2022-02-10 03:07:04,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:04,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:04,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:04,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:04,369 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) [2022-02-10 03:07:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:04,786 INFO L93 Difference]: Finished difference Result 987 states and 2893 transitions. [2022-02-10 03:07:04,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:07:04,786 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 [2022-02-10 03:07:04,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:04,788 INFO L225 Difference]: With dead ends: 987 [2022-02-10 03:07:04,788 INFO L226 Difference]: Without dead ends: 983 [2022-02-10 03:07:04,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:07:04,788 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 [2022-02-10 03:07:04,788 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] [2022-02-10 03:07:04,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-02-10 03:07:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 887. [2022-02-10 03:07:04,797 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) [2022-02-10 03:07:04,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2711 transitions. [2022-02-10 03:07:04,799 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2711 transitions. Word has length 17 [2022-02-10 03:07:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:04,799 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2711 transitions. [2022-02-10 03:07:04,799 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) [2022-02-10 03:07:04,799 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2711 transitions. [2022-02-10 03:07:04,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:04,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:04,800 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:04,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-02-10 03:07:05,000 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 [2022-02-10 03:07:05,000 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:05,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:05,001 INFO L85 PathProgramCache]: Analyzing trace with hash 783656215, now seen corresponding path program 232 times [2022-02-10 03:07:05,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:05,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672161806] [2022-02-10 03:07:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:05,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:05,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:05,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672161806] [2022-02-10 03:07:05,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672161806] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:05,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995561292] [2022-02-10 03:07:05,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:05,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:05,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:05,091 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) [2022-02-10 03:07:05,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-10 03:07:05,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:05,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:05,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:05,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:05,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:05,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:05,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:05,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:05,353 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:05,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:05,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:05,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995561292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:05,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:05,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:07:05,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059958498] [2022-02-10 03:07:05,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:05,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:05,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:05,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:05,382 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) [2022-02-10 03:07:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:05,926 INFO L93 Difference]: Finished difference Result 1011 states and 2961 transitions. [2022-02-10 03:07:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-10 03:07:05,927 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 [2022-02-10 03:07:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:05,928 INFO L225 Difference]: With dead ends: 1011 [2022-02-10 03:07:05,928 INFO L226 Difference]: Without dead ends: 1007 [2022-02-10 03:07:05,928 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 [2022-02-10 03:07:05,928 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 [2022-02-10 03:07:05,928 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] [2022-02-10 03:07:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-02-10 03:07:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 903. [2022-02-10 03:07:05,943 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) [2022-02-10 03:07:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2755 transitions. [2022-02-10 03:07:05,945 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2755 transitions. Word has length 17 [2022-02-10 03:07:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:05,945 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 2755 transitions. [2022-02-10 03:07:05,945 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) [2022-02-10 03:07:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2755 transitions. [2022-02-10 03:07:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:05,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:05,946 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:05,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:06,151 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 [2022-02-10 03:07:06,151 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:06,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:06,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1792967375, now seen corresponding path program 233 times [2022-02-10 03:07:06,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:06,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649389415] [2022-02-10 03:07:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:06,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:06,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:06,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649389415] [2022-02-10 03:07:06,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649389415] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:06,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349514393] [2022-02-10 03:07:06,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:06,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:06,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:06,234 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) [2022-02-10 03:07:06,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-10 03:07:06,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:07:06,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:06,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:06,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:06,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:06,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:06,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:06,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:06,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:06,479 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:06,479 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 28 treesize of output 23 [2022-02-10 03:07:06,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:06,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349514393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:06,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:06,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:07:06,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245050352] [2022-02-10 03:07:06,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:06,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:06,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:06,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:06,504 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) [2022-02-10 03:07:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:06,896 INFO L93 Difference]: Finished difference Result 1006 states and 2942 transitions. [2022-02-10 03:07:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:07:06,897 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 [2022-02-10 03:07:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:06,898 INFO L225 Difference]: With dead ends: 1006 [2022-02-10 03:07:06,898 INFO L226 Difference]: Without dead ends: 1005 [2022-02-10 03:07:06,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:07:06,898 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 [2022-02-10 03:07:06,898 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] [2022-02-10 03:07:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-02-10 03:07:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 885. [2022-02-10 03:07:06,907 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) [2022-02-10 03:07:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2688 transitions. [2022-02-10 03:07:06,909 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2688 transitions. Word has length 17 [2022-02-10 03:07:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:06,909 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 2688 transitions. [2022-02-10 03:07:06,909 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) [2022-02-10 03:07:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2688 transitions. [2022-02-10 03:07:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:06,910 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:06,910 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:06,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-02-10 03:07:07,110 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 [2022-02-10 03:07:07,110 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:07,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:07,110 INFO L85 PathProgramCache]: Analyzing trace with hash 791386613, now seen corresponding path program 234 times [2022-02-10 03:07:07,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:07,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794604231] [2022-02-10 03:07:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:07,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:07,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:07,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794604231] [2022-02-10 03:07:07,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794604231] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:07,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436674786] [2022-02-10 03:07:07,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:07,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:07,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:07,189 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) [2022-02-10 03:07:07,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-10 03:07:07,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:07:07,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:07,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:07,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:07,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:07,355 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:07:07,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:07,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:07,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:07,448 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:07,448 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 28 treesize of output 23 [2022-02-10 03:07:07,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:07,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436674786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:07,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:07,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:07:07,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353592481] [2022-02-10 03:07:07,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:07,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:07,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:07,473 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) [2022-02-10 03:07:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:07,747 INFO L93 Difference]: Finished difference Result 958 states and 2834 transitions. [2022-02-10 03:07:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:07:07,748 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 [2022-02-10 03:07:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:07,749 INFO L225 Difference]: With dead ends: 958 [2022-02-10 03:07:07,749 INFO L226 Difference]: Without dead ends: 958 [2022-02-10 03:07:07,749 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 [2022-02-10 03:07:07,749 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 [2022-02-10 03:07:07,749 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] [2022-02-10 03:07:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-02-10 03:07:07,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 870. [2022-02-10 03:07:07,758 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) [2022-02-10 03:07:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2642 transitions. [2022-02-10 03:07:07,759 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2642 transitions. Word has length 17 [2022-02-10 03:07:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:07,760 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 2642 transitions. [2022-02-10 03:07:07,760 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) [2022-02-10 03:07:07,760 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2642 transitions. [2022-02-10 03:07:07,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:07,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:07,761 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:07,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-02-10 03:07:07,961 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 [2022-02-10 03:07:07,961 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:07,961 INFO L85 PathProgramCache]: Analyzing trace with hash -38966221, now seen corresponding path program 235 times [2022-02-10 03:07:07,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:07,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368236051] [2022-02-10 03:07:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:07,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:08,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:08,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368236051] [2022-02-10 03:07:08,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368236051] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:08,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711223768] [2022-02-10 03:07:08,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:08,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:08,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:08,049 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) [2022-02-10 03:07:08,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-10 03:07:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:08,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:08,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:08,189 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 43 treesize of output 35 [2022-02-10 03:07:08,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:08,191 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 35 treesize of output 27 [2022-02-10 03:07:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:08,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:08,338 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:08,338 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:07:08,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:08,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711223768] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:08,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:08,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:07:08,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3366772] [2022-02-10 03:07:08,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:08,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:08,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:08,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:08,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:08,364 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) [2022-02-10 03:07:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:08,726 INFO L93 Difference]: Finished difference Result 1001 states and 2880 transitions. [2022-02-10 03:07:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:07:08,726 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 [2022-02-10 03:07:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:08,727 INFO L225 Difference]: With dead ends: 1001 [2022-02-10 03:07:08,727 INFO L226 Difference]: Without dead ends: 999 [2022-02-10 03:07:08,727 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 [2022-02-10 03:07:08,727 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 108 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-10 03:07:08,727 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] [2022-02-10 03:07:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-02-10 03:07:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 887. [2022-02-10 03:07:08,737 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) [2022-02-10 03:07:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2699 transitions. [2022-02-10 03:07:08,738 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2699 transitions. Word has length 17 [2022-02-10 03:07:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:08,738 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2699 transitions. [2022-02-10 03:07:08,738 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) [2022-02-10 03:07:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2699 transitions. [2022-02-10 03:07:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:08,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:08,739 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:08,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:08,939 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 [2022-02-10 03:07:08,940 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash 762650007, now seen corresponding path program 236 times [2022-02-10 03:07:08,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:08,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120155672] [2022-02-10 03:07:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:08,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:09,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:09,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120155672] [2022-02-10 03:07:09,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120155672] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:09,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327218540] [2022-02-10 03:07:09,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:09,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:09,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:09,026 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) [2022-02-10 03:07:09,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-10 03:07:09,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:09,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:09,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:09,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:09,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:09,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:09,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:09,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:09,310 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:09,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:09,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:09,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327218540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:09,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:09,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:07:09,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368024809] [2022-02-10 03:07:09,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:09,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:09,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:09,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:09,332 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) [2022-02-10 03:07:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:10,373 INFO L93 Difference]: Finished difference Result 1090 states and 3107 transitions. [2022-02-10 03:07:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-10 03:07:10,374 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 [2022-02-10 03:07:10,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:10,375 INFO L225 Difference]: With dead ends: 1090 [2022-02-10 03:07:10,375 INFO L226 Difference]: Without dead ends: 1083 [2022-02-10 03:07:10,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2022-02-10 03:07:10,375 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:10,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 68 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:07:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-02-10 03:07:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 912. [2022-02-10 03:07:10,385 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) [2022-02-10 03:07:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2780 transitions. [2022-02-10 03:07:10,386 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2780 transitions. Word has length 17 [2022-02-10 03:07:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:10,387 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2780 transitions. [2022-02-10 03:07:10,387 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) [2022-02-10 03:07:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2780 transitions. [2022-02-10 03:07:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:10,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:10,388 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:10,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:10,600 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 [2022-02-10 03:07:10,600 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1813973583, now seen corresponding path program 237 times [2022-02-10 03:07:10,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:10,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725084147] [2022-02-10 03:07:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:10,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:10,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:10,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725084147] [2022-02-10 03:07:10,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725084147] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:10,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988834809] [2022-02-10 03:07:10,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:10,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:10,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:10,681 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) [2022-02-10 03:07:10,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-10 03:07:10,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:07:10,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:10,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:10,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:10,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:10,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:10,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:10,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:10,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:10,961 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:10,961 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:07:10,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:10,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988834809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:10,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:10,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:07:10,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17388723] [2022-02-10 03:07:10,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:10,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:10,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:10,982 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) [2022-02-10 03:07:11,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:11,745 INFO L93 Difference]: Finished difference Result 1086 states and 3082 transitions. [2022-02-10 03:07:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-10 03:07:11,746 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 [2022-02-10 03:07:11,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:11,747 INFO L225 Difference]: With dead ends: 1086 [2022-02-10 03:07:11,747 INFO L226 Difference]: Without dead ends: 1084 [2022-02-10 03:07:11,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1536, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:07:11,748 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 [2022-02-10 03:07:11,748 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] [2022-02-10 03:07:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-02-10 03:07:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 888. [2022-02-10 03:07:11,757 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) [2022-02-10 03:07:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2685 transitions. [2022-02-10 03:07:11,758 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2685 transitions. Word has length 17 [2022-02-10 03:07:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:11,758 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 2685 transitions. [2022-02-10 03:07:11,758 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) [2022-02-10 03:07:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2685 transitions. [2022-02-10 03:07:11,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:11,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:11,759 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:11,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-02-10 03:07:11,960 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 [2022-02-10 03:07:11,960 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash 770380405, now seen corresponding path program 238 times [2022-02-10 03:07:11,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:11,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893662862] [2022-02-10 03:07:11,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:11,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:12,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:12,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893662862] [2022-02-10 03:07:12,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893662862] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:12,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405475850] [2022-02-10 03:07:12,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:12,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:12,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:12,039 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) [2022-02-10 03:07:12,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-10 03:07:12,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:12,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:12,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:12,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:12,202 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 29 treesize of output 23 [2022-02-10 03:07:12,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:12,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:12,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:12,310 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:12,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:12,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:12,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405475850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:12,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:12,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:07:12,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075137026] [2022-02-10 03:07:12,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:12,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:12,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:12,331 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) [2022-02-10 03:07:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:12,909 INFO L93 Difference]: Finished difference Result 1011 states and 2925 transitions. [2022-02-10 03:07:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:07:12,910 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 [2022-02-10 03:07:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:12,911 INFO L225 Difference]: With dead ends: 1011 [2022-02-10 03:07:12,911 INFO L226 Difference]: Without dead ends: 1011 [2022-02-10 03:07:12,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:07:12,911 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:07:12,911 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] [2022-02-10 03:07:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-02-10 03:07:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 882. [2022-02-10 03:07:12,920 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) [2022-02-10 03:07:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2665 transitions. [2022-02-10 03:07:12,921 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2665 transitions. Word has length 17 [2022-02-10 03:07:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:12,922 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2665 transitions. [2022-02-10 03:07:12,922 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) [2022-02-10 03:07:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2665 transitions. [2022-02-10 03:07:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:12,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:12,923 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:12,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-02-10 03:07:13,123 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 [2022-02-10 03:07:13,123 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash -719024591, now seen corresponding path program 239 times [2022-02-10 03:07:13,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:13,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642640432] [2022-02-10 03:07:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:13,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:13,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:13,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642640432] [2022-02-10 03:07:13,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642640432] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:13,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755129992] [2022-02-10 03:07:13,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:13,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:13,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:13,201 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) [2022-02-10 03:07:13,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-10 03:07:13,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:07:13,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:13,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:13,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:13,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:13,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:13,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:13,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:13,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:13,475 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:13,475 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 30 treesize of output 27 [2022-02-10 03:07:13,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:13,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755129992] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:13,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:13,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:07:13,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793656517] [2022-02-10 03:07:13,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:13,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:13,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:13,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:13,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:13,496 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) [2022-02-10 03:07:13,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:13,676 INFO L93 Difference]: Finished difference Result 960 states and 2824 transitions. [2022-02-10 03:07:13,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:07:13,676 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 [2022-02-10 03:07:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:13,677 INFO L225 Difference]: With dead ends: 960 [2022-02-10 03:07:13,677 INFO L226 Difference]: Without dead ends: 960 [2022-02-10 03:07:13,678 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 [2022-02-10 03:07:13,678 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 [2022-02-10 03:07:13,678 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] [2022-02-10 03:07:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-02-10 03:07:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 878. [2022-02-10 03:07:13,687 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) [2022-02-10 03:07:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2652 transitions. [2022-02-10 03:07:13,688 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2652 transitions. Word has length 17 [2022-02-10 03:07:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:13,688 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 2652 transitions. [2022-02-10 03:07:13,688 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) [2022-02-10 03:07:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2652 transitions. [2022-02-10 03:07:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:13,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:13,689 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:13,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-02-10 03:07:13,889 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 [2022-02-10 03:07:13,890 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash -690158669, now seen corresponding path program 240 times [2022-02-10 03:07:13,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:13,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650740497] [2022-02-10 03:07:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:13,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:13,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:13,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650740497] [2022-02-10 03:07:13,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650740497] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:13,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650753788] [2022-02-10 03:07:13,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:13,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:13,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:13,992 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) [2022-02-10 03:07:13,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-10 03:07:14,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:07:14,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:14,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:14,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:14,152 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 43 treesize of output 35 [2022-02-10 03:07:14,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:14,154 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 35 treesize of output 27 [2022-02-10 03:07:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:14,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:14,336 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:14,336 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 42 treesize of output 35 [2022-02-10 03:07:14,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:14,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650753788] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:14,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:14,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:07:14,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970463086] [2022-02-10 03:07:14,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:14,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:14,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:14,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:14,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:14,360 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) [2022-02-10 03:07:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:14,696 INFO L93 Difference]: Finished difference Result 1016 states and 2901 transitions. [2022-02-10 03:07:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:07:14,696 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 [2022-02-10 03:07:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:14,698 INFO L225 Difference]: With dead ends: 1016 [2022-02-10 03:07:14,698 INFO L226 Difference]: Without dead ends: 1016 [2022-02-10 03:07:14,698 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 [2022-02-10 03:07:14,698 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 [2022-02-10 03:07:14,698 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] [2022-02-10 03:07:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-02-10 03:07:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 900. [2022-02-10 03:07:14,707 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) [2022-02-10 03:07:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2724 transitions. [2022-02-10 03:07:14,709 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2724 transitions. Word has length 17 [2022-02-10 03:07:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:14,709 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2724 transitions. [2022-02-10 03:07:14,709 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) [2022-02-10 03:07:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2724 transitions. [2022-02-10 03:07:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:14,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:14,710 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:14,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-02-10 03:07:14,910 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 [2022-02-10 03:07:14,910 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash 111457559, now seen corresponding path program 241 times [2022-02-10 03:07:14,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:14,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940954987] [2022-02-10 03:07:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:14,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:15,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:15,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940954987] [2022-02-10 03:07:15,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940954987] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:15,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353828861] [2022-02-10 03:07:15,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:15,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:15,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:15,023 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) [2022-02-10 03:07:15,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-10 03:07:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:15,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:15,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:15,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:15,184 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 43 treesize of output 35 [2022-02-10 03:07:15,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:15,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:15,361 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:15,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:15,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:15,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353828861] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:15,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:15,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:07:15,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349041796] [2022-02-10 03:07:15,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:15,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:15,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:15,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:15,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:15,380 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) [2022-02-10 03:07:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:16,808 INFO L93 Difference]: Finished difference Result 1064 states and 3006 transitions. [2022-02-10 03:07:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-10 03:07:16,808 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 [2022-02-10 03:07:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:16,810 INFO L225 Difference]: With dead ends: 1064 [2022-02-10 03:07:16,810 INFO L226 Difference]: Without dead ends: 1058 [2022-02-10 03:07:16,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=423, Invalid=2999, Unknown=0, NotChecked=0, Total=3422 [2022-02-10 03:07:16,810 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 [2022-02-10 03:07:16,810 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] [2022-02-10 03:07:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-02-10 03:07:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 921. [2022-02-10 03:07:16,819 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) [2022-02-10 03:07:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2791 transitions. [2022-02-10 03:07:16,821 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2791 transitions. Word has length 17 [2022-02-10 03:07:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:16,821 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 2791 transitions. [2022-02-10 03:07:16,821 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) [2022-02-10 03:07:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2791 transitions. [2022-02-10 03:07:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:16,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:16,822 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:16,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-02-10 03:07:17,026 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 [2022-02-10 03:07:17,026 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:17,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1829801265, now seen corresponding path program 242 times [2022-02-10 03:07:17,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:17,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830902500] [2022-02-10 03:07:17,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:17,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:17,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:17,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830902500] [2022-02-10 03:07:17,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830902500] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:17,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249495796] [2022-02-10 03:07:17,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:17,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:17,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:17,119 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) [2022-02-10 03:07:17,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-10 03:07:17,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:17,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:17,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:17,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:17,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:17,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:17,284 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 35 treesize of output 27 [2022-02-10 03:07:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:17,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:17,443 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:17,443 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:07:17,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:17,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249495796] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:17,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:17,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:07:17,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031574729] [2022-02-10 03:07:17,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:17,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:17,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:17,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:17,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:17,462 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) [2022-02-10 03:07:18,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:18,527 INFO L93 Difference]: Finished difference Result 1059 states and 3012 transitions. [2022-02-10 03:07:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:07:18,528 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 [2022-02-10 03:07:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:18,530 INFO L225 Difference]: With dead ends: 1059 [2022-02-10 03:07:18,530 INFO L226 Difference]: Without dead ends: 1059 [2022-02-10 03:07:18,530 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 [2022-02-10 03:07:18,530 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 [2022-02-10 03:07:18,530 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] [2022-02-10 03:07:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-02-10 03:07:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 902. [2022-02-10 03:07:18,539 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) [2022-02-10 03:07:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2724 transitions. [2022-02-10 03:07:18,541 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2724 transitions. Word has length 17 [2022-02-10 03:07:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:18,541 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 2724 transitions. [2022-02-10 03:07:18,541 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) [2022-02-10 03:07:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2724 transitions. [2022-02-10 03:07:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:18,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:18,542 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:18,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-02-10 03:07:18,744 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 [2022-02-10 03:07:18,744 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:18,745 INFO L85 PathProgramCache]: Analyzing trace with hash 119187957, now seen corresponding path program 243 times [2022-02-10 03:07:18,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:18,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139894828] [2022-02-10 03:07:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:18,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:18,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:18,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139894828] [2022-02-10 03:07:18,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139894828] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:18,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640883195] [2022-02-10 03:07:18,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:18,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:18,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:18,834 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) [2022-02-10 03:07:18,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-10 03:07:18,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:07:18,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:18,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:18,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:19,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:19,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:19,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:19,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:19,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:19,144 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:19,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:19,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:19,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640883195] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:19,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:19,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:07:19,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010163213] [2022-02-10 03:07:19,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:19,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:19,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:19,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:19,163 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) [2022-02-10 03:07:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:20,130 INFO L93 Difference]: Finished difference Result 1032 states and 2971 transitions. [2022-02-10 03:07:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 03:07:20,131 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 [2022-02-10 03:07:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:20,132 INFO L225 Difference]: With dead ends: 1032 [2022-02-10 03:07:20,132 INFO L226 Difference]: Without dead ends: 1032 [2022-02-10 03:07:20,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=334, Invalid=1922, Unknown=0, NotChecked=0, Total=2256 [2022-02-10 03:07:20,133 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:20,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 60 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 783 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2022-02-10 03:07:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-02-10 03:07:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 903. [2022-02-10 03:07:20,141 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) [2022-02-10 03:07:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2724 transitions. [2022-02-10 03:07:20,143 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2724 transitions. Word has length 17 [2022-02-10 03:07:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:20,143 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 2724 transitions. [2022-02-10 03:07:20,143 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) [2022-02-10 03:07:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2724 transitions. [2022-02-10 03:07:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:20,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:20,144 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:20,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-02-10 03:07:20,344 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 [2022-02-10 03:07:20,345 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:20,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1726709143, now seen corresponding path program 244 times [2022-02-10 03:07:20,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:20,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105457043] [2022-02-10 03:07:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:20,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:20,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:20,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105457043] [2022-02-10 03:07:20,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105457043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:20,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478179729] [2022-02-10 03:07:20,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:20,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:20,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:20,435 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) [2022-02-10 03:07:20,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-10 03:07:20,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:20,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:20,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:20,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:20,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:20,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:20,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:20,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:20,770 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:20,770 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:07:20,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:20,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478179729] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:20,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:20,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:07:20,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533969145] [2022-02-10 03:07:20,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:20,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:20,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:20,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:20,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:20,789 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) [2022-02-10 03:07:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:21,662 INFO L93 Difference]: Finished difference Result 1012 states and 2932 transitions. [2022-02-10 03:07:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:07:21,662 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 [2022-02-10 03:07:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:21,664 INFO L225 Difference]: With dead ends: 1012 [2022-02-10 03:07:21,664 INFO L226 Difference]: Without dead ends: 1012 [2022-02-10 03:07:21,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:07:21,664 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:21,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 30 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 604 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-02-10 03:07:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-02-10 03:07:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 903. [2022-02-10 03:07:21,673 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) [2022-02-10 03:07:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2724 transitions. [2022-02-10 03:07:21,674 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2724 transitions. Word has length 17 [2022-02-10 03:07:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:21,675 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 2724 transitions. [2022-02-10 03:07:21,675 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) [2022-02-10 03:07:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2724 transitions. [2022-02-10 03:07:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:21,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:21,676 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:21,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:21,876 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 [2022-02-10 03:07:21,876 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1370217039, now seen corresponding path program 245 times [2022-02-10 03:07:21,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:21,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991564610] [2022-02-10 03:07:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:21,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:21,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:21,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991564610] [2022-02-10 03:07:21,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991564610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:21,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192920487] [2022-02-10 03:07:21,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:21,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:21,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:21,966 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) [2022-02-10 03:07:21,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-10 03:07:21,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:07:21,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:21,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:21,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:22,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:22,146 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:07:22,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:22,148 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:07:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:22,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:22,265 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:22,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:22,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:22,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192920487] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:22,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:22,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:07:22,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698776316] [2022-02-10 03:07:22,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:22,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:22,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:22,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:22,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:22,284 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) [2022-02-10 03:07:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:22,836 INFO L93 Difference]: Finished difference Result 984 states and 2887 transitions. [2022-02-10 03:07:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:07:22,836 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 [2022-02-10 03:07:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:22,837 INFO L225 Difference]: With dead ends: 984 [2022-02-10 03:07:22,837 INFO L226 Difference]: Without dead ends: 984 [2022-02-10 03:07:22,838 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 [2022-02-10 03:07:22,838 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 [2022-02-10 03:07:22,838 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] [2022-02-10 03:07:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-02-10 03:07:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 904. [2022-02-10 03:07:22,847 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) [2022-02-10 03:07:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2726 transitions. [2022-02-10 03:07:22,848 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2726 transitions. Word has length 17 [2022-02-10 03:07:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:22,848 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2726 transitions. [2022-02-10 03:07:22,848 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) [2022-02-10 03:07:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2726 transitions. [2022-02-10 03:07:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:22,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:22,849 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:22,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-02-10 03:07:23,049 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 [2022-02-10 03:07:23,050 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:23,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:23,050 INFO L85 PathProgramCache]: Analyzing trace with hash -297131659, now seen corresponding path program 246 times [2022-02-10 03:07:23,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:23,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603209832] [2022-02-10 03:07:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:23,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:23,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:23,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603209832] [2022-02-10 03:07:23,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603209832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:23,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582928087] [2022-02-10 03:07:23,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:23,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:23,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:23,140 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) [2022-02-10 03:07:23,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-10 03:07:23,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:07:23,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:23,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:23,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:23,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:23,312 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 29 treesize of output 23 [2022-02-10 03:07:23,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:23,314 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:07:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:23,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:23,418 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:23,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:23,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:23,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582928087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:23,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:23,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:07:23,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859362024] [2022-02-10 03:07:23,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:23,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:23,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:23,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:23,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:23,437 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) [2022-02-10 03:07:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:23,602 INFO L93 Difference]: Finished difference Result 952 states and 2831 transitions. [2022-02-10 03:07:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:07:23,602 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 [2022-02-10 03:07:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:23,603 INFO L225 Difference]: With dead ends: 952 [2022-02-10 03:07:23,603 INFO L226 Difference]: Without dead ends: 952 [2022-02-10 03:07:23,603 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 [2022-02-10 03:07:23,603 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 [2022-02-10 03:07:23,604 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] [2022-02-10 03:07:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-02-10 03:07:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 908. [2022-02-10 03:07:23,612 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) [2022-02-10 03:07:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2738 transitions. [2022-02-10 03:07:23,614 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2738 transitions. Word has length 17 [2022-02-10 03:07:23,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:23,614 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2738 transitions. [2022-02-10 03:07:23,614 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) [2022-02-10 03:07:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2738 transitions. [2022-02-10 03:07:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:23,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:23,615 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:23,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:23,815 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 [2022-02-10 03:07:23,815 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:23,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1310389527, now seen corresponding path program 247 times [2022-02-10 03:07:23,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:23,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623469610] [2022-02-10 03:07:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:23,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:23,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:23,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623469610] [2022-02-10 03:07:23,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623469610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:23,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693682127] [2022-02-10 03:07:23,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:23,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:23,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:23,905 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) [2022-02-10 03:07:23,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-10 03:07:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:23,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:23,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:24,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:24,084 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 29 treesize of output 23 [2022-02-10 03:07:24,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:24,086 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 21 treesize of output 2 [2022-02-10 03:07:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:24,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:24,191 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:24,192 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:07:24,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:24,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693682127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:24,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:24,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:07:24,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16855750] [2022-02-10 03:07:24,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:24,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:24,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:24,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:24,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:24,210 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) [2022-02-10 03:07:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:24,381 INFO L93 Difference]: Finished difference Result 962 states and 2849 transitions. [2022-02-10 03:07:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:07:24,381 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 [2022-02-10 03:07:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:24,382 INFO L225 Difference]: With dead ends: 962 [2022-02-10 03:07:24,383 INFO L226 Difference]: Without dead ends: 962 [2022-02-10 03:07:24,383 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 [2022-02-10 03:07:24,383 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 [2022-02-10 03:07:24,383 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] [2022-02-10 03:07:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-02-10 03:07:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 906. [2022-02-10 03:07:24,392 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) [2022-02-10 03:07:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2732 transitions. [2022-02-10 03:07:24,399 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2732 transitions. Word has length 17 [2022-02-10 03:07:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:24,400 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2732 transitions. [2022-02-10 03:07:24,400 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) [2022-02-10 03:07:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2732 transitions. [2022-02-10 03:07:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:24,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:24,401 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:24,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-02-10 03:07:24,601 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 [2022-02-10 03:07:24,601 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1255530435, now seen corresponding path program 248 times [2022-02-10 03:07:24,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:24,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603425314] [2022-02-10 03:07:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:24,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:24,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:24,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603425314] [2022-02-10 03:07:24,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603425314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:24,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087998700] [2022-02-10 03:07:24,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:24,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:24,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:24,692 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) [2022-02-10 03:07:24,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-10 03:07:24,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:24,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:24,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:24,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:24,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:24,872 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 29 treesize of output 23 [2022-02-10 03:07:24,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:24,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:24,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:24,997 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:24,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:24,999 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 [2022-02-10 03:07:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:25,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087998700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:25,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:25,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:07:25,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397404274] [2022-02-10 03:07:25,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:25,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:25,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:25,017 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) [2022-02-10 03:07:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:25,216 INFO L93 Difference]: Finished difference Result 962 states and 2841 transitions. [2022-02-10 03:07:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:07:25,216 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 [2022-02-10 03:07:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:25,217 INFO L225 Difference]: With dead ends: 962 [2022-02-10 03:07:25,217 INFO L226 Difference]: Without dead ends: 962 [2022-02-10 03:07:25,218 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 [2022-02-10 03:07:25,218 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 [2022-02-10 03:07:25,218 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] [2022-02-10 03:07:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-02-10 03:07:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 904. [2022-02-10 03:07:25,226 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) [2022-02-10 03:07:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2726 transitions. [2022-02-10 03:07:25,228 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2726 transitions. Word has length 17 [2022-02-10 03:07:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:25,228 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2726 transitions. [2022-02-10 03:07:25,228 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) [2022-02-10 03:07:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2726 transitions. [2022-02-10 03:07:25,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:25,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:25,229 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:25,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-02-10 03:07:25,429 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 [2022-02-10 03:07:25,430 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:25,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash 906074359, now seen corresponding path program 249 times [2022-02-10 03:07:25,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:25,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112876468] [2022-02-10 03:07:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:25,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:25,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:25,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112876468] [2022-02-10 03:07:25,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112876468] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:25,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248620724] [2022-02-10 03:07:25,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:25,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:25,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:25,539 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) [2022-02-10 03:07:25,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-10 03:07:25,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:07:25,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:25,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:25,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:25,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:25,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:25,726 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 7 treesize of output 1 [2022-02-10 03:07:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:25,729 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 8 treesize of output 1 [2022-02-10 03:07:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:25,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:25,845 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:25,845 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 30 treesize of output 27 [2022-02-10 03:07:25,847 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 13 treesize of output 9 [2022-02-10 03:07:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:25,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248620724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:25,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:25,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:07:25,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707311398] [2022-02-10 03:07:25,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:25,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:25,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:25,865 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) [2022-02-10 03:07:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:26,191 INFO L93 Difference]: Finished difference Result 1039 states and 2986 transitions. [2022-02-10 03:07:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:07:26,191 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 [2022-02-10 03:07:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:26,193 INFO L225 Difference]: With dead ends: 1039 [2022-02-10 03:07:26,193 INFO L226 Difference]: Without dead ends: 1039 [2022-02-10 03:07:26,193 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 [2022-02-10 03:07:26,193 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:26,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 230 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:07:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-02-10 03:07:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 944. [2022-02-10 03:07:26,202 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) [2022-02-10 03:07:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2855 transitions. [2022-02-10 03:07:26,204 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2855 transitions. Word has length 17 [2022-02-10 03:07:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:26,204 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 2855 transitions. [2022-02-10 03:07:26,204 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) [2022-02-10 03:07:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2855 transitions. [2022-02-10 03:07:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:26,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:26,205 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:26,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-02-10 03:07:26,405 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 [2022-02-10 03:07:26,406 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:26,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1836956947, now seen corresponding path program 250 times [2022-02-10 03:07:26,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:26,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004957910] [2022-02-10 03:07:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:26,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:26,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:26,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004957910] [2022-02-10 03:07:26,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004957910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:26,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356291776] [2022-02-10 03:07:26,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:26,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:26,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:26,498 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) [2022-02-10 03:07:26,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-10 03:07:26,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:26,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:26,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:26,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:26,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:26,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:26,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:26,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:26,793 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:26,793 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:07:26,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:26,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356291776] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:26,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:26,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:07:26,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929038180] [2022-02-10 03:07:26,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:26,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:26,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:26,817 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) [2022-02-10 03:07:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:27,207 INFO L93 Difference]: Finished difference Result 1027 states and 2957 transitions. [2022-02-10 03:07:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:07:27,207 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 [2022-02-10 03:07:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:27,209 INFO L225 Difference]: With dead ends: 1027 [2022-02-10 03:07:27,209 INFO L226 Difference]: Without dead ends: 1019 [2022-02-10 03:07:27,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:07:27,209 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:07:27,209 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] [2022-02-10 03:07:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-02-10 03:07:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 950. [2022-02-10 03:07:27,219 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) [2022-02-10 03:07:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2861 transitions. [2022-02-10 03:07:27,221 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2861 transitions. Word has length 17 [2022-02-10 03:07:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:27,221 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 2861 transitions. [2022-02-10 03:07:27,221 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) [2022-02-10 03:07:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2861 transitions. [2022-02-10 03:07:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:27,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:27,222 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:27,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-02-10 03:07:27,422 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 [2022-02-10 03:07:27,423 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:27,423 INFO L85 PathProgramCache]: Analyzing trace with hash -254947755, now seen corresponding path program 251 times [2022-02-10 03:07:27,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:27,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523932259] [2022-02-10 03:07:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:27,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:27,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:27,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523932259] [2022-02-10 03:07:27,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523932259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:27,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283299354] [2022-02-10 03:07:27,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:27,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:27,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:27,519 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) [2022-02-10 03:07:27,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-10 03:07:27,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:07:27,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:27,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:27,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:27,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:27,712 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 [2022-02-10 03:07:27,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:27,715 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-10 03:07:27,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:27,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:27,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:27,842 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:27,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:27,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:27,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283299354] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:27,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:27,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:07:27,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902907722] [2022-02-10 03:07:27,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:27,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:27,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:27,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:27,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:27,861 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) [2022-02-10 03:07:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:29,159 INFO L93 Difference]: Finished difference Result 1142 states and 3172 transitions. [2022-02-10 03:07:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-10 03:07:29,160 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 [2022-02-10 03:07:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:29,161 INFO L225 Difference]: With dead ends: 1142 [2022-02-10 03:07:29,161 INFO L226 Difference]: Without dead ends: 1138 [2022-02-10 03:07:29,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=436, Invalid=2644, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 03:07:29,162 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:29,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 192 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:07:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-02-10 03:07:29,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 948. [2022-02-10 03:07:29,172 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) [2022-02-10 03:07:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2862 transitions. [2022-02-10 03:07:29,173 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2862 transitions. Word has length 17 [2022-02-10 03:07:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:29,173 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 2862 transitions. [2022-02-10 03:07:29,173 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) [2022-02-10 03:07:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2862 transitions. [2022-02-10 03:07:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:29,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:29,175 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:29,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-02-10 03:07:29,375 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 [2022-02-10 03:07:29,375 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:29,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1299101369, now seen corresponding path program 252 times [2022-02-10 03:07:29,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:29,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262005009] [2022-02-10 03:07:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:29,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:29,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:29,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262005009] [2022-02-10 03:07:29,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262005009] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:29,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487562815] [2022-02-10 03:07:29,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:29,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:29,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:29,471 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) [2022-02-10 03:07:29,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-10 03:07:29,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:07:29,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:29,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:29,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:29,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:29,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:29,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:29,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:29,800 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:29,800 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 42 treesize of output 35 [2022-02-10 03:07:29,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:29,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487562815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:29,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:29,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:07:29,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108275472] [2022-02-10 03:07:29,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:29,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:29,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:29,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:29,824 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) [2022-02-10 03:07:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:30,385 INFO L93 Difference]: Finished difference Result 1042 states and 2980 transitions. [2022-02-10 03:07:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:07:30,385 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 [2022-02-10 03:07:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:30,386 INFO L225 Difference]: With dead ends: 1042 [2022-02-10 03:07:30,386 INFO L226 Difference]: Without dead ends: 1033 [2022-02-10 03:07:30,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 03:07:30,387 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:30,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 130 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:07:30,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-02-10 03:07:30,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 951. [2022-02-10 03:07:30,396 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) [2022-02-10 03:07:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 2865 transitions. [2022-02-10 03:07:30,398 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 2865 transitions. Word has length 17 [2022-02-10 03:07:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:30,398 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 2865 transitions. [2022-02-10 03:07:30,398 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) [2022-02-10 03:07:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 2865 transitions. [2022-02-10 03:07:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:30,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:30,399 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:30,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-02-10 03:07:30,601 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 [2022-02-10 03:07:30,601 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash -15305417, now seen corresponding path program 253 times [2022-02-10 03:07:30,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:30,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887539779] [2022-02-10 03:07:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:30,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:30,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:30,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887539779] [2022-02-10 03:07:30,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887539779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:30,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559936955] [2022-02-10 03:07:30,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:30,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:30,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:30,701 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) [2022-02-10 03:07:30,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-10 03:07:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:30,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:30,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:30,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:30,903 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:07:30,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:30,906 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 7 treesize of output 1 [2022-02-10 03:07:30,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:30,908 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-02-10 03:07:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:30,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:31,058 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:31,058 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 30 treesize of output 27 [2022-02-10 03:07:31,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:31,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559936955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:31,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:31,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:07:31,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327225490] [2022-02-10 03:07:31,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:31,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:31,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:31,077 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) [2022-02-10 03:07:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:32,240 INFO L93 Difference]: Finished difference Result 1141 states and 3180 transitions. [2022-02-10 03:07:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-10 03:07:32,240 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 [2022-02-10 03:07:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:32,242 INFO L225 Difference]: With dead ends: 1141 [2022-02-10 03:07:32,242 INFO L226 Difference]: Without dead ends: 1135 [2022-02-10 03:07:32,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2022-02-10 03:07:32,242 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:32,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 126 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:07:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-02-10 03:07:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 957. [2022-02-10 03:07:32,256 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) [2022-02-10 03:07:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2891 transitions. [2022-02-10 03:07:32,258 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2891 transitions. Word has length 17 [2022-02-10 03:07:32,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:32,258 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 2891 transitions. [2022-02-10 03:07:32,258 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) [2022-02-10 03:07:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2891 transitions. [2022-02-10 03:07:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:32,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:32,259 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:32,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-02-10 03:07:32,459 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 [2022-02-10 03:07:32,459 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:32,460 INFO L85 PathProgramCache]: Analyzing trace with hash -935006125, now seen corresponding path program 254 times [2022-02-10 03:07:32,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:32,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133402348] [2022-02-10 03:07:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:32,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:32,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:32,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133402348] [2022-02-10 03:07:32,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133402348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:32,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246889236] [2022-02-10 03:07:32,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:32,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:32,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:32,559 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) [2022-02-10 03:07:32,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-10 03:07:32,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:32,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:32,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:32,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:32,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:32,759 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 39 treesize of output 33 [2022-02-10 03:07:32,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:32,761 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 33 treesize of output 27 [2022-02-10 03:07:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:32,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:32,900 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:32,901 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:07:32,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:32,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246889236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:32,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:32,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:07:32,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600421487] [2022-02-10 03:07:32,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:32,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:32,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:32,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:32,925 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) [2022-02-10 03:07:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:33,451 INFO L93 Difference]: Finished difference Result 1020 states and 2973 transitions. [2022-02-10 03:07:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:07:33,452 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 [2022-02-10 03:07:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:33,453 INFO L225 Difference]: With dead ends: 1020 [2022-02-10 03:07:33,453 INFO L226 Difference]: Without dead ends: 1014 [2022-02-10 03:07:33,453 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 [2022-02-10 03:07:33,454 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 [2022-02-10 03:07:33,454 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] [2022-02-10 03:07:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-02-10 03:07:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 958. [2022-02-10 03:07:33,463 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) [2022-02-10 03:07:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2890 transitions. [2022-02-10 03:07:33,464 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2890 transitions. Word has length 17 [2022-02-10 03:07:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:33,464 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 2890 transitions. [2022-02-10 03:07:33,464 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) [2022-02-10 03:07:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2890 transitions. [2022-02-10 03:07:33,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:33,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:33,470 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:33,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-02-10 03:07:33,675 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 [2022-02-10 03:07:33,675 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash -7575019, now seen corresponding path program 255 times [2022-02-10 03:07:33,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:33,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618044786] [2022-02-10 03:07:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:33,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:33,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:33,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618044786] [2022-02-10 03:07:33,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618044786] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:33,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850154026] [2022-02-10 03:07:33,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:33,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:33,781 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) [2022-02-10 03:07:33,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-10 03:07:33,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:07:33,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:33,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:07:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:33,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:33,951 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 43 treesize of output 35 [2022-02-10 03:07:33,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:33,953 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:07:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:34,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:34,131 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:34,132 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:07:34,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:34,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850154026] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:34,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:34,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:07:34,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739582821] [2022-02-10 03:07:34,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:34,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:34,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:34,151 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) [2022-02-10 03:07:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:35,107 INFO L93 Difference]: Finished difference Result 1119 states and 3082 transitions. [2022-02-10 03:07:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:07:35,108 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 [2022-02-10 03:07:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:35,109 INFO L225 Difference]: With dead ends: 1119 [2022-02-10 03:07:35,109 INFO L226 Difference]: Without dead ends: 1113 [2022-02-10 03:07:35,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=284, Invalid=1696, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:07:35,109 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:35,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 146 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:07:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-02-10 03:07:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 937. [2022-02-10 03:07:35,119 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) [2022-02-10 03:07:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2816 transitions. [2022-02-10 03:07:35,120 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2816 transitions. Word has length 17 [2022-02-10 03:07:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:35,120 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 2816 transitions. [2022-02-10 03:07:35,120 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) [2022-02-10 03:07:35,120 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2816 transitions. [2022-02-10 03:07:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:35,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:35,121 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:35,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-02-10 03:07:35,321 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 [2022-02-10 03:07:35,322 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:35,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:35,322 INFO L85 PathProgramCache]: Analyzing trace with hash 794041209, now seen corresponding path program 256 times [2022-02-10 03:07:35,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:35,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347487352] [2022-02-10 03:07:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:35,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:35,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:35,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347487352] [2022-02-10 03:07:35,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347487352] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:35,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743736398] [2022-02-10 03:07:35,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:35,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:35,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:35,425 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) [2022-02-10 03:07:35,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-10 03:07:35,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:35,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:35,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:35,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:35,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:35,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:35,596 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 35 treesize of output 27 [2022-02-10 03:07:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:35,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:35,764 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:35,764 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 [2022-02-10 03:07:35,766 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 [2022-02-10 03:07:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:35,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743736398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:35,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:35,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:07:35,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189553730] [2022-02-10 03:07:35,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:35,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:35,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:35,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:35,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:35,787 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) [2022-02-10 03:07:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:36,315 INFO L93 Difference]: Finished difference Result 1015 states and 2930 transitions. [2022-02-10 03:07:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:07:36,316 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 [2022-02-10 03:07:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:36,317 INFO L225 Difference]: With dead ends: 1015 [2022-02-10 03:07:36,317 INFO L226 Difference]: Without dead ends: 1011 [2022-02-10 03:07:36,317 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 [2022-02-10 03:07:36,317 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 [2022-02-10 03:07:36,317 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] [2022-02-10 03:07:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-02-10 03:07:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 942. [2022-02-10 03:07:36,326 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) [2022-02-10 03:07:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2829 transitions. [2022-02-10 03:07:36,328 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2829 transitions. Word has length 17 [2022-02-10 03:07:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:36,328 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 2829 transitions. [2022-02-10 03:07:36,328 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) [2022-02-10 03:07:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2829 transitions. [2022-02-10 03:07:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:36,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:36,329 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:36,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:36,529 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 [2022-02-10 03:07:36,530 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1782582381, now seen corresponding path program 257 times [2022-02-10 03:07:36,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:36,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774219307] [2022-02-10 03:07:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:36,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:36,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:36,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774219307] [2022-02-10 03:07:36,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774219307] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:36,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097629250] [2022-02-10 03:07:36,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:36,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:36,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:36,630 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) [2022-02-10 03:07:36,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-10 03:07:36,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:07:36,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:36,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:36,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:36,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:36,800 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 43 treesize of output 35 [2022-02-10 03:07:36,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:36,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:36,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:36,984 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:36,984 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 42 treesize of output 35 [2022-02-10 03:07:36,986 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 [2022-02-10 03:07:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:37,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097629250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:37,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:37,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:07:37,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136664041] [2022-02-10 03:07:37,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:37,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:37,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:37,009 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) [2022-02-10 03:07:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:37,387 INFO L93 Difference]: Finished difference Result 1004 states and 2916 transitions. [2022-02-10 03:07:37,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:07:37,387 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 [2022-02-10 03:07:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:37,389 INFO L225 Difference]: With dead ends: 1004 [2022-02-10 03:07:37,389 INFO L226 Difference]: Without dead ends: 1004 [2022-02-10 03:07:37,389 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 [2022-02-10 03:07:37,389 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 [2022-02-10 03:07:37,389 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] [2022-02-10 03:07:37,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-02-10 03:07:37,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 931. [2022-02-10 03:07:37,398 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) [2022-02-10 03:07:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2794 transitions. [2022-02-10 03:07:37,400 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2794 transitions. Word has length 17 [2022-02-10 03:07:37,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:37,400 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 2794 transitions. [2022-02-10 03:07:37,400 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) [2022-02-10 03:07:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2794 transitions. [2022-02-10 03:07:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:37,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:37,401 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:37,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:37,601 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 [2022-02-10 03:07:37,601 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:37,602 INFO L85 PathProgramCache]: Analyzing trace with hash 505854579, now seen corresponding path program 258 times [2022-02-10 03:07:37,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:37,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542667900] [2022-02-10 03:07:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:37,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:37,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:37,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542667900] [2022-02-10 03:07:37,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542667900] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:37,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005001824] [2022-02-10 03:07:37,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:37,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:37,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:37,694 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) [2022-02-10 03:07:37,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-10 03:07:37,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:07:37,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:37,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:37,845 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:07:37,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:37,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:37,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:38,009 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:38,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:38,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:38,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005001824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:38,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:38,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:07:38,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213670700] [2022-02-10 03:07:38,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:38,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:38,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:38,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:38,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:38,031 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) [2022-02-10 03:07:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:38,730 INFO L93 Difference]: Finished difference Result 992 states and 2918 transitions. [2022-02-10 03:07:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:07:38,730 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 [2022-02-10 03:07:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:38,732 INFO L225 Difference]: With dead ends: 992 [2022-02-10 03:07:38,732 INFO L226 Difference]: Without dead ends: 990 [2022-02-10 03:07:38,732 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 [2022-02-10 03:07:38,732 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 [2022-02-10 03:07:38,732 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] [2022-02-10 03:07:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-02-10 03:07:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 937. [2022-02-10 03:07:38,741 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) [2022-02-10 03:07:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2806 transitions. [2022-02-10 03:07:38,743 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2806 transitions. Word has length 17 [2022-02-10 03:07:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:38,743 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 2806 transitions. [2022-02-10 03:07:38,743 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) [2022-02-10 03:07:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2806 transitions. [2022-02-10 03:07:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:38,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:38,744 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:38,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:38,955 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 [2022-02-10 03:07:38,955 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:38,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1517986223, now seen corresponding path program 259 times [2022-02-10 03:07:38,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:38,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445574709] [2022-02-10 03:07:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:38,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:39,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:39,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445574709] [2022-02-10 03:07:39,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445574709] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:39,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671490724] [2022-02-10 03:07:39,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:39,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:39,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:39,037 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) [2022-02-10 03:07:39,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-10 03:07:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:39,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:39,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:39,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:39,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:39,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:39,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:39,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:39,294 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:39,294 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:07:39,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:39,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671490724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:39,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:39,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:07:39,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020043640] [2022-02-10 03:07:39,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:39,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:39,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:39,322 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) [2022-02-10 03:07:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:39,594 INFO L93 Difference]: Finished difference Result 1061 states and 3027 transitions. [2022-02-10 03:07:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:07:39,594 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 [2022-02-10 03:07:39,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:39,595 INFO L225 Difference]: With dead ends: 1061 [2022-02-10 03:07:39,595 INFO L226 Difference]: Without dead ends: 1061 [2022-02-10 03:07:39,595 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 [2022-02-10 03:07:39,596 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-10 03:07:39,596 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] [2022-02-10 03:07:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2022-02-10 03:07:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 962. [2022-02-10 03:07:39,605 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) [2022-02-10 03:07:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 2888 transitions. [2022-02-10 03:07:39,606 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 2888 transitions. Word has length 17 [2022-02-10 03:07:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:39,607 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 2888 transitions. [2022-02-10 03:07:39,607 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) [2022-02-10 03:07:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 2888 transitions. [2022-02-10 03:07:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:39,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:39,608 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:39,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-02-10 03:07:39,808 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 [2022-02-10 03:07:39,808 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash -716369995, now seen corresponding path program 260 times [2022-02-10 03:07:39,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:39,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028042859] [2022-02-10 03:07:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:39,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:39,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:39,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028042859] [2022-02-10 03:07:39,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028042859] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:39,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243687054] [2022-02-10 03:07:39,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:39,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:39,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:39,881 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) [2022-02-10 03:07:39,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-10 03:07:39,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:39,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:40,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:40,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:40,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:40,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:40,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:40,148 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:40,148 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 28 treesize of output 23 [2022-02-10 03:07:40,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:40,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243687054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:40,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:40,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:07:40,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319277784] [2022-02-10 03:07:40,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:40,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:40,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:40,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:40,172 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) [2022-02-10 03:07:40,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:40,663 INFO L93 Difference]: Finished difference Result 1096 states and 3114 transitions. [2022-02-10 03:07:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:07:40,663 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 [2022-02-10 03:07:40,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:40,665 INFO L225 Difference]: With dead ends: 1096 [2022-02-10 03:07:40,665 INFO L226 Difference]: Without dead ends: 1092 [2022-02-10 03:07:40,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:07:40,665 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:40,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 146 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:07:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-02-10 03:07:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 976. [2022-02-10 03:07:40,674 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) [2022-02-10 03:07:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2932 transitions. [2022-02-10 03:07:40,676 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2932 transitions. Word has length 17 [2022-02-10 03:07:40,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:40,676 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 2932 transitions. [2022-02-10 03:07:40,676 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) [2022-02-10 03:07:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2932 transitions. [2022-02-10 03:07:40,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:40,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:40,677 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:40,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-02-10 03:07:40,877 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 [2022-02-10 03:07:40,877 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:40,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:40,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1001973711, now seen corresponding path program 261 times [2022-02-10 03:07:40,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:40,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652879326] [2022-02-10 03:07:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:40,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:40,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:40,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652879326] [2022-02-10 03:07:40,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652879326] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:40,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241086102] [2022-02-10 03:07:40,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:40,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:40,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:40,951 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) [2022-02-10 03:07:40,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-10 03:07:40,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:07:40,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:40,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:40,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:41,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:41,082 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 43 treesize of output 35 [2022-02-10 03:07:41,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:41,084 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 35 treesize of output 27 [2022-02-10 03:07:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:41,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:41,203 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:41,203 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 28 treesize of output 23 [2022-02-10 03:07:41,205 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 11 treesize of output 7 [2022-02-10 03:07:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:41,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241086102] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:41,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:41,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:07:41,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927415849] [2022-02-10 03:07:41,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:41,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:41,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:41,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:41,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:41,228 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) [2022-02-10 03:07:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:41,540 INFO L93 Difference]: Finished difference Result 1074 states and 3079 transitions. [2022-02-10 03:07:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:07:41,540 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 [2022-02-10 03:07:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:41,541 INFO L225 Difference]: With dead ends: 1074 [2022-02-10 03:07:41,541 INFO L226 Difference]: Without dead ends: 1074 [2022-02-10 03:07:41,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:07:41,542 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:41,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 120 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:07:41,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-02-10 03:07:41,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 965. [2022-02-10 03:07:41,551 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) [2022-02-10 03:07:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 2887 transitions. [2022-02-10 03:07:41,553 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 2887 transitions. Word has length 17 [2022-02-10 03:07:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:41,553 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 2887 transitions. [2022-02-10 03:07:41,553 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) [2022-02-10 03:07:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 2887 transitions. [2022-02-10 03:07:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:41,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:41,554 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:41,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:41,770 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 [2022-02-10 03:07:41,770 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:41,770 INFO L85 PathProgramCache]: Analyzing trace with hash -708639597, now seen corresponding path program 262 times [2022-02-10 03:07:41,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:41,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975419311] [2022-02-10 03:07:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:41,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:41,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:41,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975419311] [2022-02-10 03:07:41,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975419311] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:41,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152032249] [2022-02-10 03:07:41,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:41,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:41,840 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) [2022-02-10 03:07:41,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-10 03:07:41,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:41,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:41,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:41,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:41,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:42,000 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 29 treesize of output 23 [2022-02-10 03:07:42,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:42,002 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 21 treesize of output 2 [2022-02-10 03:07:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:42,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:42,094 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:42,094 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:07:42,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:42,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152032249] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:42,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:42,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:07:42,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145808145] [2022-02-10 03:07:42,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:42,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:42,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:42,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:42,118 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) [2022-02-10 03:07:42,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:42,378 INFO L93 Difference]: Finished difference Result 1048 states and 3022 transitions. [2022-02-10 03:07:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:07:42,379 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 [2022-02-10 03:07:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:42,380 INFO L225 Difference]: With dead ends: 1048 [2022-02-10 03:07:42,380 INFO L226 Difference]: Without dead ends: 1048 [2022-02-10 03:07:42,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:42,381 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 [2022-02-10 03:07:42,381 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] [2022-02-10 03:07:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-02-10 03:07:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 964. [2022-02-10 03:07:42,390 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) [2022-02-10 03:07:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2883 transitions. [2022-02-10 03:07:42,392 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2883 transitions. Word has length 17 [2022-02-10 03:07:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:42,392 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 2883 transitions. [2022-02-10 03:07:42,392 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) [2022-02-10 03:07:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2883 transitions. [2022-02-10 03:07:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:42,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:42,393 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:42,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-02-10 03:07:42,593 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 [2022-02-10 03:07:42,593 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash -561657485, now seen corresponding path program 263 times [2022-02-10 03:07:42,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:42,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596356773] [2022-02-10 03:07:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:42,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:42,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:42,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596356773] [2022-02-10 03:07:42,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596356773] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:42,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879307672] [2022-02-10 03:07:42,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:42,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:42,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:42,669 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) [2022-02-10 03:07:42,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-10 03:07:42,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:07:42,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:42,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:42,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:42,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:42,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:42,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:42,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:42,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:42,939 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:42,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:42,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:42,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879307672] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:42,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:42,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:07:42,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377217613] [2022-02-10 03:07:42,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:42,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:42,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:42,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:42,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:42,968 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) [2022-02-10 03:07:43,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:43,302 INFO L93 Difference]: Finished difference Result 1006 states and 2955 transitions. [2022-02-10 03:07:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:07:43,302 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 [2022-02-10 03:07:43,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:43,304 INFO L225 Difference]: With dead ends: 1006 [2022-02-10 03:07:43,304 INFO L226 Difference]: Without dead ends: 1004 [2022-02-10 03:07:43,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:07:43,304 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:43,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 24 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:07:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-02-10 03:07:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 966. [2022-02-10 03:07:43,313 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) [2022-02-10 03:07:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 2881 transitions. [2022-02-10 03:07:43,315 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 2881 transitions. Word has length 17 [2022-02-10 03:07:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:43,315 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 2881 transitions. [2022-02-10 03:07:43,315 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) [2022-02-10 03:07:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 2881 transitions. [2022-02-10 03:07:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:43,316 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:43,316 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:43,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:43,516 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 [2022-02-10 03:07:43,516 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:43,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1167389849, now seen corresponding path program 264 times [2022-02-10 03:07:43,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:43,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221030488] [2022-02-10 03:07:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:43,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:43,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:43,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221030488] [2022-02-10 03:07:43,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221030488] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:43,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850642970] [2022-02-10 03:07:43,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:43,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:43,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:43,589 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) [2022-02-10 03:07:43,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-10 03:07:43,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:07:43,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:43,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:43,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:43,766 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 39 treesize of output 33 [2022-02-10 03:07:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:43,768 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 33 treesize of output 27 [2022-02-10 03:07:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:43,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:43,863 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:07:43,863 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 42 treesize of output 33 [2022-02-10 03:07:43,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:43,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850642970] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:43,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:43,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:07:43,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354103861] [2022-02-10 03:07:43,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:43,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:43,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:43,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:43,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:43,891 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) [2022-02-10 03:07:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:44,121 INFO L93 Difference]: Finished difference Result 981 states and 2909 transitions. [2022-02-10 03:07:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:07:44,122 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 [2022-02-10 03:07:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:44,123 INFO L225 Difference]: With dead ends: 981 [2022-02-10 03:07:44,123 INFO L226 Difference]: Without dead ends: 977 [2022-02-10 03:07:44,123 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 [2022-02-10 03:07:44,123 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 [2022-02-10 03:07:44,123 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] [2022-02-10 03:07:44,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-02-10 03:07:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 966. [2022-02-10 03:07:44,132 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) [2022-02-10 03:07:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 2871 transitions. [2022-02-10 03:07:44,134 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 2871 transitions. Word has length 17 [2022-02-10 03:07:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:44,134 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 2871 transitions. [2022-02-10 03:07:44,134 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) [2022-02-10 03:07:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 2871 transitions. [2022-02-10 03:07:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:44,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:44,135 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:44,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-02-10 03:07:44,335 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 [2022-02-10 03:07:44,336 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:44,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:44,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1096093291, now seen corresponding path program 265 times [2022-02-10 03:07:44,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:44,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254173572] [2022-02-10 03:07:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:44,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:44,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:44,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254173572] [2022-02-10 03:07:44,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254173572] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:44,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211678891] [2022-02-10 03:07:44,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:44,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:44,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:44,423 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) [2022-02-10 03:07:44,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-10 03:07:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:44,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:44,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:44,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:44,572 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:07:44,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:44,574 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:07:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:44,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:44,721 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:44,722 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 42 treesize of output 35 [2022-02-10 03:07:44,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:44,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211678891] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:44,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:44,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:07:44,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557817363] [2022-02-10 03:07:44,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:44,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:44,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:44,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:44,748 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) [2022-02-10 03:07:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:45,107 INFO L93 Difference]: Finished difference Result 1114 states and 3122 transitions. [2022-02-10 03:07:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:07:45,107 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 [2022-02-10 03:07:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:45,109 INFO L225 Difference]: With dead ends: 1114 [2022-02-10 03:07:45,109 INFO L226 Difference]: Without dead ends: 1114 [2022-02-10 03:07:45,109 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 [2022-02-10 03:07:45,109 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 [2022-02-10 03:07:45,109 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] [2022-02-10 03:07:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-02-10 03:07:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 987. [2022-02-10 03:07:45,124 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) [2022-02-10 03:07:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2944 transitions. [2022-02-10 03:07:45,126 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2944 transitions. Word has length 17 [2022-02-10 03:07:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:45,126 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 2944 transitions. [2022-02-10 03:07:45,126 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) [2022-02-10 03:07:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2944 transitions. [2022-02-10 03:07:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:45,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:45,127 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:45,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-02-10 03:07:45,327 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 [2022-02-10 03:07:45,328 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash -294477063, now seen corresponding path program 266 times [2022-02-10 03:07:45,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:45,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122228848] [2022-02-10 03:07:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:45,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:45,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:45,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122228848] [2022-02-10 03:07:45,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122228848] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:45,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598066726] [2022-02-10 03:07:45,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:45,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:45,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:45,415 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) [2022-02-10 03:07:45,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-10 03:07:45,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:45,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:45,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:45,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:45,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:45,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:45,566 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 35 treesize of output 27 [2022-02-10 03:07:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:45,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:45,729 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:45,729 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:07:45,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:45,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598066726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:45,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:45,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-02-10 03:07:45,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369327958] [2022-02-10 03:07:45,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:45,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:45,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:45,751 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) [2022-02-10 03:07:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:46,792 INFO L93 Difference]: Finished difference Result 1235 states and 3387 transitions. [2022-02-10 03:07:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-10 03:07:46,792 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 [2022-02-10 03:07:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:46,794 INFO L225 Difference]: With dead ends: 1235 [2022-02-10 03:07:46,794 INFO L226 Difference]: Without dead ends: 1229 [2022-02-10 03:07:46,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=2483, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:07:46,794 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 [2022-02-10 03:07:46,794 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] [2022-02-10 03:07:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-02-10 03:07:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1012. [2022-02-10 03:07:46,805 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) [2022-02-10 03:07:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3027 transitions. [2022-02-10 03:07:46,806 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3027 transitions. Word has length 17 [2022-02-10 03:07:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:46,806 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3027 transitions. [2022-02-10 03:07:46,806 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) [2022-02-10 03:07:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3027 transitions. [2022-02-10 03:07:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:46,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:46,808 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:46,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-02-10 03:07:47,008 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 [2022-02-10 03:07:47,008 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1423866643, now seen corresponding path program 267 times [2022-02-10 03:07:47,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:47,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956456457] [2022-02-10 03:07:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:47,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:47,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:47,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956456457] [2022-02-10 03:07:47,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956456457] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:47,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662737178] [2022-02-10 03:07:47,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:47,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:47,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:47,095 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) [2022-02-10 03:07:47,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-10 03:07:47,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:07:47,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:47,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:47,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:47,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:47,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:47,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:47,248 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 35 treesize of output 27 [2022-02-10 03:07:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:47,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:47,400 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:47,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:47,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:47,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662737178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:47,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:47,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-02-10 03:07:47,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732643250] [2022-02-10 03:07:47,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:47,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:47,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:47,422 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) [2022-02-10 03:07:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:48,073 INFO L93 Difference]: Finished difference Result 1196 states and 3328 transitions. [2022-02-10 03:07:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:07:48,073 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 [2022-02-10 03:07:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:48,075 INFO L225 Difference]: With dead ends: 1196 [2022-02-10 03:07:48,075 INFO L226 Difference]: Without dead ends: 1196 [2022-02-10 03:07:48,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:07:48,075 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 [2022-02-10 03:07:48,075 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] [2022-02-10 03:07:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-02-10 03:07:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 996. [2022-02-10 03:07:48,086 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) [2022-02-10 03:07:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 2964 transitions. [2022-02-10 03:07:48,087 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 2964 transitions. Word has length 17 [2022-02-10 03:07:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:48,087 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 2964 transitions. [2022-02-10 03:07:48,087 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) [2022-02-10 03:07:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 2964 transitions. [2022-02-10 03:07:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:48,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:48,089 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:48,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-02-10 03:07:48,289 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 [2022-02-10 03:07:48,289 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:48,289 INFO L85 PathProgramCache]: Analyzing trace with hash -286746665, now seen corresponding path program 268 times [2022-02-10 03:07:48,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:48,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111523707] [2022-02-10 03:07:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:48,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:48,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:48,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111523707] [2022-02-10 03:07:48,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111523707] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:48,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217652075] [2022-02-10 03:07:48,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:48,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:48,402 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) [2022-02-10 03:07:48,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-10 03:07:48,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:48,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:48,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:48,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:48,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:48,576 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 [2022-02-10 03:07:48,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:48,578 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 21 treesize of output 2 [2022-02-10 03:07:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:48,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:48,691 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:48,692 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 [2022-02-10 03:07:48,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:48,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217652075] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:48,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:48,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:07:48,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682741692] [2022-02-10 03:07:48,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:48,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:48,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:48,715 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) [2022-02-10 03:07:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:49,430 INFO L93 Difference]: Finished difference Result 1133 states and 3184 transitions. [2022-02-10 03:07:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 03:07:49,431 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 [2022-02-10 03:07:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:49,432 INFO L225 Difference]: With dead ends: 1133 [2022-02-10 03:07:49,432 INFO L226 Difference]: Without dead ends: 1133 [2022-02-10 03:07:49,432 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 [2022-02-10 03:07:49,432 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 [2022-02-10 03:07:49,432 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] [2022-02-10 03:07:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-02-10 03:07:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 998. [2022-02-10 03:07:49,442 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) [2022-02-10 03:07:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2965 transitions. [2022-02-10 03:07:49,444 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2965 transitions. Word has length 17 [2022-02-10 03:07:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:49,444 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 2965 transitions. [2022-02-10 03:07:49,444 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) [2022-02-10 03:07:49,444 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2965 transitions. [2022-02-10 03:07:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:49,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:49,445 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:49,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-02-10 03:07:49,645 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 [2022-02-10 03:07:49,645 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:49,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1320774521, now seen corresponding path program 269 times [2022-02-10 03:07:49,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:49,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171387942] [2022-02-10 03:07:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:49,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:49,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:49,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171387942] [2022-02-10 03:07:49,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171387942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:49,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081599987] [2022-02-10 03:07:49,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:49,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:49,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:49,730 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) [2022-02-10 03:07:49,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-02-10 03:07:49,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:07:49,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:49,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:49,916 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 29 treesize of output 23 [2022-02-10 03:07:49,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:49,918 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 21 treesize of output 2 [2022-02-10 03:07:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:49,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:50,033 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:50,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:50,035 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 [2022-02-10 03:07:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:50,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081599987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:50,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:50,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:07:50,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937882930] [2022-02-10 03:07:50,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:50,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:50,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:50,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:50,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:50,055 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) [2022-02-10 03:07:50,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:50,597 INFO L93 Difference]: Finished difference Result 1113 states and 3153 transitions. [2022-02-10 03:07:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:07:50,598 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 [2022-02-10 03:07:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:50,599 INFO L225 Difference]: With dead ends: 1113 [2022-02-10 03:07:50,599 INFO L226 Difference]: Without dead ends: 1113 [2022-02-10 03:07:50,599 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 [2022-02-10 03:07:50,599 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 [2022-02-10 03:07:50,599 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] [2022-02-10 03:07:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-02-10 03:07:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 988. [2022-02-10 03:07:50,609 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) [2022-02-10 03:07:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2935 transitions. [2022-02-10 03:07:50,610 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2935 transitions. Word has length 17 [2022-02-10 03:07:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:50,610 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 2935 transitions. [2022-02-10 03:07:50,610 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) [2022-02-10 03:07:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2935 transitions. [2022-02-10 03:07:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:50,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:50,611 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:50,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:50,812 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 [2022-02-10 03:07:50,812 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1776151661, now seen corresponding path program 270 times [2022-02-10 03:07:50,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:50,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571610442] [2022-02-10 03:07:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:50,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:50,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:50,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571610442] [2022-02-10 03:07:50,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571610442] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:50,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889012967] [2022-02-10 03:07:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:50,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:50,892 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) [2022-02-10 03:07:50,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-02-10 03:07:50,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:07:50,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:50,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:50,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:51,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:51,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:51,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:51,065 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:07:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:51,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:51,165 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:51,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:51,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:51,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889012967] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:51,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:51,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:07:51,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553000901] [2022-02-10 03:07:51,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:51,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:51,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:51,188 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) [2022-02-10 03:07:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:51,431 INFO L93 Difference]: Finished difference Result 1080 states and 3088 transitions. [2022-02-10 03:07:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:07:51,432 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 [2022-02-10 03:07:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:51,433 INFO L225 Difference]: With dead ends: 1080 [2022-02-10 03:07:51,433 INFO L226 Difference]: Without dead ends: 1080 [2022-02-10 03:07:51,434 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 [2022-02-10 03:07:51,434 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 [2022-02-10 03:07:51,434 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] [2022-02-10 03:07:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-02-10 03:07:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 988. [2022-02-10 03:07:51,444 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) [2022-02-10 03:07:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2935 transitions. [2022-02-10 03:07:51,446 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2935 transitions. Word has length 17 [2022-02-10 03:07:51,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:51,446 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 2935 transitions. [2022-02-10 03:07:51,446 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) [2022-02-10 03:07:51,446 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2935 transitions. [2022-02-10 03:07:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:51,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:51,447 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:51,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:51,647 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 [2022-02-10 03:07:51,647 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1799298487, now seen corresponding path program 271 times [2022-02-10 03:07:51,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:51,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400171695] [2022-02-10 03:07:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:51,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:51,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:51,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400171695] [2022-02-10 03:07:51,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400171695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:51,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367260500] [2022-02-10 03:07:51,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:51,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:51,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:51,743 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) [2022-02-10 03:07:51,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-02-10 03:07:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:51,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:51,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:51,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:51,898 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:07:51,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:51,900 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 35 treesize of output 27 [2022-02-10 03:07:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:51,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:52,048 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:52,049 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 42 treesize of output 35 [2022-02-10 03:07:52,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:52,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367260500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:52,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:52,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:07:52,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079331813] [2022-02-10 03:07:52,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:52,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:52,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:52,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:52,075 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) [2022-02-10 03:07:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:52,615 INFO L93 Difference]: Finished difference Result 1107 states and 3149 transitions. [2022-02-10 03:07:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:07:52,615 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 [2022-02-10 03:07:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:52,617 INFO L225 Difference]: With dead ends: 1107 [2022-02-10 03:07:52,617 INFO L226 Difference]: Without dead ends: 1105 [2022-02-10 03:07:52,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:07:52,617 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:07:52,617 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] [2022-02-10 03:07:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-02-10 03:07:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1004. [2022-02-10 03:07:52,627 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) [2022-02-10 03:07:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 2983 transitions. [2022-02-10 03:07:52,628 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 2983 transitions. Word has length 17 [2022-02-10 03:07:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:52,628 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 2983 transitions. [2022-02-10 03:07:52,628 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) [2022-02-10 03:07:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 2983 transitions. [2022-02-10 03:07:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:52,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:52,630 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:52,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-02-10 03:07:52,830 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 [2022-02-10 03:07:52,830 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:52,831 INFO L85 PathProgramCache]: Analyzing trace with hash -766621475, now seen corresponding path program 272 times [2022-02-10 03:07:52,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:52,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995035812] [2022-02-10 03:07:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:52,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:52,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:52,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995035812] [2022-02-10 03:07:52,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995035812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:52,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818524004] [2022-02-10 03:07:52,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:52,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:52,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:52,915 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) [2022-02-10 03:07:52,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-02-10 03:07:52,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:52,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:52,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:52,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:53,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:53,117 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 39 treesize of output 33 [2022-02-10 03:07:53,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:53,119 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 33 treesize of output 27 [2022-02-10 03:07:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:53,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:53,240 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:53,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:53,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:53,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818524004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:53,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:53,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:07:53,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168877058] [2022-02-10 03:07:53,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:53,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:53,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:53,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:53,267 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) [2022-02-10 03:07:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:53,724 INFO L93 Difference]: Finished difference Result 1064 states and 3066 transitions. [2022-02-10 03:07:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:07:53,724 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 [2022-02-10 03:07:53,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:53,726 INFO L225 Difference]: With dead ends: 1064 [2022-02-10 03:07:53,726 INFO L226 Difference]: Without dead ends: 1060 [2022-02-10 03:07:53,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:07:53,726 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:07:53,726 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] [2022-02-10 03:07:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-02-10 03:07:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1004. [2022-02-10 03:07:53,736 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) [2022-02-10 03:07:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 2977 transitions. [2022-02-10 03:07:53,737 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 2977 transitions. Word has length 17 [2022-02-10 03:07:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:53,737 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 2977 transitions. [2022-02-10 03:07:53,737 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) [2022-02-10 03:07:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 2977 transitions. [2022-02-10 03:07:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:53,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:53,738 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:53,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-02-10 03:07:53,939 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 [2022-02-10 03:07:53,939 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1294238327, now seen corresponding path program 273 times [2022-02-10 03:07:53,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:53,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371483508] [2022-02-10 03:07:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:53,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:54,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:54,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371483508] [2022-02-10 03:07:54,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371483508] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:54,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847051988] [2022-02-10 03:07:54,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:54,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:54,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:54,021 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) [2022-02-10 03:07:54,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-02-10 03:07:54,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:07:54,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:54,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:54,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:54,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:54,220 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 39 treesize of output 33 [2022-02-10 03:07:54,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:54,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:54,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:54,331 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:54,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:54,333 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 21 treesize of output 13 [2022-02-10 03:07:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:07:54,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847051988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:54,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:54,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:07:54,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372558156] [2022-02-10 03:07:54,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:54,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:54,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:54,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:54,357 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) [2022-02-10 03:07:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:54,742 INFO L93 Difference]: Finished difference Result 1059 states and 3049 transitions. [2022-02-10 03:07:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:07:54,742 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 [2022-02-10 03:07:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:54,744 INFO L225 Difference]: With dead ends: 1059 [2022-02-10 03:07:54,744 INFO L226 Difference]: Without dead ends: 1053 [2022-02-10 03:07:54,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:07:54,744 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:54,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 110 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 508 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-02-10 03:07:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-02-10 03:07:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1007. [2022-02-10 03:07:54,754 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) [2022-02-10 03:07:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 2975 transitions. [2022-02-10 03:07:54,756 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 2975 transitions. Word has length 17 [2022-02-10 03:07:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:54,756 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 2975 transitions. [2022-02-10 03:07:54,756 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) [2022-02-10 03:07:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 2975 transitions. [2022-02-10 03:07:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:54,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:54,757 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:54,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-02-10 03:07:54,957 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 [2022-02-10 03:07:54,957 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:54,957 INFO L85 PathProgramCache]: Analyzing trace with hash -902314287, now seen corresponding path program 274 times [2022-02-10 03:07:54,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:54,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254176869] [2022-02-10 03:07:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:54,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:55,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:55,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254176869] [2022-02-10 03:07:55,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254176869] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:55,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146223408] [2022-02-10 03:07:55,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:55,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:55,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:55,066 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) [2022-02-10 03:07:55,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-02-10 03:07:55,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:55,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:55,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:55,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:55,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:55,233 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 43 treesize of output 35 [2022-02-10 03:07:55,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:55,235 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 35 treesize of output 27 [2022-02-10 03:07:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:55,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:55,420 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:55,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:55,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:55,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146223408] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:55,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:55,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-10 03:07:55,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920300705] [2022-02-10 03:07:55,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:55,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:07:55,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:07:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:55,444 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) [2022-02-10 03:07:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:55,801 INFO L93 Difference]: Finished difference Result 1177 states and 3299 transitions. [2022-02-10 03:07:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:07:55,801 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 [2022-02-10 03:07:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:55,803 INFO L225 Difference]: With dead ends: 1177 [2022-02-10 03:07:55,803 INFO L226 Difference]: Without dead ends: 1176 [2022-02-10 03:07:55,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:07:55,803 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 125 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:07:55,803 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] [2022-02-10 03:07:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-02-10 03:07:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1044. [2022-02-10 03:07:55,813 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) [2022-02-10 03:07:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3109 transitions. [2022-02-10 03:07:55,815 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3109 transitions. Word has length 17 [2022-02-10 03:07:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:55,815 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 3109 transitions. [2022-02-10 03:07:55,815 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) [2022-02-10 03:07:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3109 transitions. [2022-02-10 03:07:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:55,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:55,816 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:55,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-02-10 03:07:56,016 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 [2022-02-10 03:07:56,017 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash -100698059, now seen corresponding path program 275 times [2022-02-10 03:07:56,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:56,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096213687] [2022-02-10 03:07:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:56,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:56,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:56,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096213687] [2022-02-10 03:07:56,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096213687] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:56,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30443093] [2022-02-10 03:07:56,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:56,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:56,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:56,110 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) [2022-02-10 03:07:56,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-02-10 03:07:56,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:07:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:56,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:56,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:56,279 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:07:56,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:56,281 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:07:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:56,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:56,453 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:56,453 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:07:56,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:56,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30443093] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:56,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:56,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:07:56,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760086776] [2022-02-10 03:07:56,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:56,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:56,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:56,472 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) [2022-02-10 03:07:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:57,567 INFO L93 Difference]: Finished difference Result 1212 states and 3385 transitions. [2022-02-10 03:07:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 03:07:57,567 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 [2022-02-10 03:07:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:57,569 INFO L225 Difference]: With dead ends: 1212 [2022-02-10 03:07:57,569 INFO L226 Difference]: Without dead ends: 1205 [2022-02-10 03:07:57,569 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 [2022-02-10 03:07:57,569 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 [2022-02-10 03:07:57,569 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] [2022-02-10 03:07:57,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-02-10 03:07:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1078. [2022-02-10 03:07:57,580 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) [2022-02-10 03:07:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3219 transitions. [2022-02-10 03:07:57,582 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3219 transitions. Word has length 17 [2022-02-10 03:07:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:57,582 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 3219 transitions. [2022-02-10 03:07:57,582 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) [2022-02-10 03:07:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3219 transitions. [2022-02-10 03:07:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:57,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:57,583 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:57,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-02-10 03:07:57,784 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 [2022-02-10 03:07:57,784 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1617645647, now seen corresponding path program 276 times [2022-02-10 03:07:57,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:57,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571419115] [2022-02-10 03:07:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:57,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:57,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:57,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571419115] [2022-02-10 03:07:57,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571419115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:57,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725921123] [2022-02-10 03:07:57,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:57,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:57,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:57,884 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) [2022-02-10 03:07:57,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-02-10 03:07:57,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:07:57,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:57,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:58,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:58,053 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 43 treesize of output 35 [2022-02-10 03:07:58,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:58,055 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:07:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:58,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:58,234 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:58,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:58,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:58,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725921123] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:58,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:58,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-10 03:07:58,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002569045] [2022-02-10 03:07:58,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:58,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:07:58,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:58,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:07:58,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:58,253 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) [2022-02-10 03:07:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:59,138 INFO L93 Difference]: Finished difference Result 1213 states and 3370 transitions. [2022-02-10 03:07:59,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:07:59,138 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 [2022-02-10 03:07:59,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:59,140 INFO L225 Difference]: With dead ends: 1213 [2022-02-10 03:07:59,140 INFO L226 Difference]: Without dead ends: 1211 [2022-02-10 03:07:59,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=329, Invalid=1741, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:07:59,140 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:59,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 92 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:07:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-02-10 03:07:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1042. [2022-02-10 03:07:59,150 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) [2022-02-10 03:07:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3088 transitions. [2022-02-10 03:07:59,152 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3088 transitions. Word has length 17 [2022-02-10 03:07:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:59,152 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 3088 transitions. [2022-02-10 03:07:59,152 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) [2022-02-10 03:07:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3088 transitions. [2022-02-10 03:07:59,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:07:59,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:59,153 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:59,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-02-10 03:07:59,354 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 [2022-02-10 03:07:59,354 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:07:59,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:59,354 INFO L85 PathProgramCache]: Analyzing trace with hash -92967661, now seen corresponding path program 277 times [2022-02-10 03:07:59,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:59,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882610945] [2022-02-10 03:07:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:59,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:59,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:59,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882610945] [2022-02-10 03:07:59,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882610945] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:59,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310314967] [2022-02-10 03:07:59,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:59,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:59,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:59,444 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) [2022-02-10 03:07:59,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-02-10 03:07:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:07:59,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:59,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:59,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:59,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:59,645 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 21 treesize of output 2 [2022-02-10 03:07:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:59,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:59,779 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:07:59,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:07:59,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:07:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:07:59,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310314967] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:59,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:59,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:07:59,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558796721] [2022-02-10 03:07:59,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:59,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:59,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:59,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:59,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:59,799 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) [2022-02-10 03:08:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:00,684 INFO L93 Difference]: Finished difference Result 1164 states and 3277 transitions. [2022-02-10 03:08:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 03:08:00,684 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 [2022-02-10 03:08:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:00,686 INFO L225 Difference]: With dead ends: 1164 [2022-02-10 03:08:00,686 INFO L226 Difference]: Without dead ends: 1162 [2022-02-10 03:08:00,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:08:00,686 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:00,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 64 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 714 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-02-10 03:08:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-02-10 03:08:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1021. [2022-02-10 03:08:00,696 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) [2022-02-10 03:08:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3017 transitions. [2022-02-10 03:08:00,697 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3017 transitions. Word has length 17 [2022-02-10 03:08:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:00,697 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 3017 transitions. [2022-02-10 03:08:00,697 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) [2022-02-10 03:08:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3017 transitions. [2022-02-10 03:08:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:00,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:00,699 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:00,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-02-10 03:08:00,899 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 [2022-02-10 03:08:00,899 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:00,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:00,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1582372657, now seen corresponding path program 278 times [2022-02-10 03:08:00,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:00,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055289414] [2022-02-10 03:08:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:00,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:01,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:01,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055289414] [2022-02-10 03:08:01,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055289414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:01,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199226806] [2022-02-10 03:08:01,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:01,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:01,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:01,014 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) [2022-02-10 03:08:01,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-02-10 03:08:01,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:01,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:01,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:01,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:01,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:01,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:01,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:01,349 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:01,349 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 [2022-02-10 03:08:01,351 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 [2022-02-10 03:08:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:01,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199226806] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:01,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:01,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:01,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674304532] [2022-02-10 03:08:01,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:01,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:01,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:01,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:01,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:01,368 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) [2022-02-10 03:08:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:01,957 INFO L93 Difference]: Finished difference Result 1097 states and 3152 transitions. [2022-02-10 03:08:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:08:01,958 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 [2022-02-10 03:08:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:01,959 INFO L225 Difference]: With dead ends: 1097 [2022-02-10 03:08:01,959 INFO L226 Difference]: Without dead ends: 1097 [2022-02-10 03:08:01,960 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 [2022-02-10 03:08:01,960 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 [2022-02-10 03:08:01,960 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] [2022-02-10 03:08:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-02-10 03:08:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1028. [2022-02-10 03:08:01,969 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) [2022-02-10 03:08:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3035 transitions. [2022-02-10 03:08:01,971 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3035 transitions. Word has length 17 [2022-02-10 03:08:01,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:01,971 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 3035 transitions. [2022-02-10 03:08:01,971 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) [2022-02-10 03:08:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3035 transitions. [2022-02-10 03:08:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:01,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:01,972 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:01,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-02-10 03:08:02,172 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 [2022-02-10 03:08:02,175 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:02,175 INFO L85 PathProgramCache]: Analyzing trace with hash 25148529, now seen corresponding path program 279 times [2022-02-10 03:08:02,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:02,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562989814] [2022-02-10 03:08:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:02,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:02,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:02,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562989814] [2022-02-10 03:08:02,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562989814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:02,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183296889] [2022-02-10 03:08:02,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:02,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:02,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:02,265 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) [2022-02-10 03:08:02,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-02-10 03:08:02,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:08:02,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:02,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:02,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:02,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:02,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:02,475 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:08:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:02,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:02,595 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:02,596 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 30 treesize of output 27 [2022-02-10 03:08:02,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:02,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183296889] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:02,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:02,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:02,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726071111] [2022-02-10 03:08:02,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:02,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:02,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:02,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:02,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:02,615 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) [2022-02-10 03:08:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:03,362 INFO L93 Difference]: Finished difference Result 1105 states and 3162 transitions. [2022-02-10 03:08:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 03:08:03,362 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 [2022-02-10 03:08:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:03,363 INFO L225 Difference]: With dead ends: 1105 [2022-02-10 03:08:03,364 INFO L226 Difference]: Without dead ends: 1105 [2022-02-10 03:08:03,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 03:08:03,364 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 [2022-02-10 03:08:03,364 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] [2022-02-10 03:08:03,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-02-10 03:08:03,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1009. [2022-02-10 03:08:03,373 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) [2022-02-10 03:08:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2985 transitions. [2022-02-10 03:08:03,375 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2985 transitions. Word has length 17 [2022-02-10 03:08:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:03,375 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2985 transitions. [2022-02-10 03:08:03,375 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) [2022-02-10 03:08:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2985 transitions. [2022-02-10 03:08:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:03,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:03,376 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:03,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-02-10 03:08:03,576 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 [2022-02-10 03:08:03,577 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash -509287277, now seen corresponding path program 280 times [2022-02-10 03:08:03,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:03,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887465308] [2022-02-10 03:08:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:03,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:03,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:03,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887465308] [2022-02-10 03:08:03,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887465308] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:03,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077694693] [2022-02-10 03:08:03,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:03,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:03,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:03,672 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) [2022-02-10 03:08:03,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-02-10 03:08:03,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:03,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:03,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:03,854 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 29 treesize of output 23 [2022-02-10 03:08:03,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:03,857 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:08:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:03,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:03,959 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:03,959 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:08:03,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:03,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077694693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:03,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:03,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:08:03,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028118349] [2022-02-10 03:08:03,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:03,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:03,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:03,978 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) [2022-02-10 03:08:04,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:04,146 INFO L93 Difference]: Finished difference Result 1050 states and 3060 transitions. [2022-02-10 03:08:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:08:04,146 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 [2022-02-10 03:08:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:04,147 INFO L225 Difference]: With dead ends: 1050 [2022-02-10 03:08:04,148 INFO L226 Difference]: Without dead ends: 1050 [2022-02-10 03:08:04,148 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 [2022-02-10 03:08:04,148 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 [2022-02-10 03:08:04,148 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] [2022-02-10 03:08:04,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-02-10 03:08:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1013. [2022-02-10 03:08:04,157 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) [2022-02-10 03:08:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2997 transitions. [2022-02-10 03:08:04,159 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2997 transitions. Word has length 17 [2022-02-10 03:08:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:04,159 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 2997 transitions. [2022-02-10 03:08:04,159 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) [2022-02-10 03:08:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2997 transitions. [2022-02-10 03:08:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:04,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:04,160 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:04,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-02-10 03:08:04,360 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 [2022-02-10 03:08:04,361 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:04,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1098233909, now seen corresponding path program 281 times [2022-02-10 03:08:04,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:04,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808735444] [2022-02-10 03:08:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:04,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:04,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:04,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808735444] [2022-02-10 03:08:04,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808735444] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:04,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044243349] [2022-02-10 03:08:04,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:04,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:04,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:04,452 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) [2022-02-10 03:08:04,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-02-10 03:08:04,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:08:04,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:04,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:04,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:04,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:04,648 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 29 treesize of output 23 [2022-02-10 03:08:04,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:04,650 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 21 treesize of output 2 [2022-02-10 03:08:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:04,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:04,759 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:04,759 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 [2022-02-10 03:08:04,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:04,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044243349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:04,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:04,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:08:04,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016824533] [2022-02-10 03:08:04,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:04,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:04,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:04,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:04,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:04,778 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) [2022-02-10 03:08:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:04,951 INFO L93 Difference]: Finished difference Result 1066 states and 3088 transitions. [2022-02-10 03:08:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:08:04,952 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 [2022-02-10 03:08:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:04,953 INFO L225 Difference]: With dead ends: 1066 [2022-02-10 03:08:04,953 INFO L226 Difference]: Without dead ends: 1066 [2022-02-10 03:08:04,953 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 [2022-02-10 03:08:04,953 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 [2022-02-10 03:08:04,953 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] [2022-02-10 03:08:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-02-10 03:08:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1009. [2022-02-10 03:08:04,963 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) [2022-02-10 03:08:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2985 transitions. [2022-02-10 03:08:04,964 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2985 transitions. Word has length 17 [2022-02-10 03:08:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:04,965 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2985 transitions. [2022-02-10 03:08:04,965 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) [2022-02-10 03:08:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2985 transitions. [2022-02-10 03:08:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:04,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:04,966 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:04,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-02-10 03:08:05,166 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 [2022-02-10 03:08:05,166 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash 879028083, now seen corresponding path program 282 times [2022-02-10 03:08:05,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:05,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139551077] [2022-02-10 03:08:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:05,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:05,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:05,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139551077] [2022-02-10 03:08:05,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139551077] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:05,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805739171] [2022-02-10 03:08:05,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:05,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:05,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:05,259 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) [2022-02-10 03:08:05,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-02-10 03:08:05,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:08:05,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:05,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:05,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:05,398 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:08:05,401 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-02-10 03:08:05,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:05,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:05,509 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:05,510 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 24 treesize of output 21 [2022-02-10 03:08:05,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:05,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805739171] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:05,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:05,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-10 03:08:05,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015180261] [2022-02-10 03:08:05,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:05,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:08:05,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:05,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:08:05,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:08:05,525 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) [2022-02-10 03:08:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:05,783 INFO L93 Difference]: Finished difference Result 1261 states and 3656 transitions. [2022-02-10 03:08:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:08:05,783 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 [2022-02-10 03:08:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:05,784 INFO L225 Difference]: With dead ends: 1261 [2022-02-10 03:08:05,785 INFO L226 Difference]: Without dead ends: 1261 [2022-02-10 03:08:05,785 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 [2022-02-10 03:08:05,785 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 [2022-02-10 03:08:05,785 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] [2022-02-10 03:08:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-02-10 03:08:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1008. [2022-02-10 03:08:05,795 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) [2022-02-10 03:08:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2984 transitions. [2022-02-10 03:08:05,804 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2984 transitions. Word has length 17 [2022-02-10 03:08:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:05,804 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 2984 transitions. [2022-02-10 03:08:05,804 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) [2022-02-10 03:08:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2984 transitions. [2022-02-10 03:08:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:05,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:05,805 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:05,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-02-10 03:08:06,006 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 [2022-02-10 03:08:06,006 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:06,006 INFO L85 PathProgramCache]: Analyzing trace with hash 744702619, now seen corresponding path program 283 times [2022-02-10 03:08:06,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:06,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653944325] [2022-02-10 03:08:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:06,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:06,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:06,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653944325] [2022-02-10 03:08:06,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653944325] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:06,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351661346] [2022-02-10 03:08:06,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:06,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:06,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:06,098 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) [2022-02-10 03:08:06,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-02-10 03:08:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:06,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:06,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:06,252 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 31 treesize of output 25 [2022-02-10 03:08:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:06,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:06,357 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:06,358 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 38 treesize of output 31 [2022-02-10 03:08:06,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:06,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351661346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:06,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:06,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-10 03:08:06,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382013462] [2022-02-10 03:08:06,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:06,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:08:06,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:08:06,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:08:06,377 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) [2022-02-10 03:08:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:06,679 INFO L93 Difference]: Finished difference Result 1257 states and 3643 transitions. [2022-02-10 03:08:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:08:06,679 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 [2022-02-10 03:08:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:06,681 INFO L225 Difference]: With dead ends: 1257 [2022-02-10 03:08:06,681 INFO L226 Difference]: Without dead ends: 1252 [2022-02-10 03:08:06,681 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 [2022-02-10 03:08:06,681 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 [2022-02-10 03:08:06,681 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] [2022-02-10 03:08:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-02-10 03:08:06,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1008. [2022-02-10 03:08:06,691 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) [2022-02-10 03:08:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2983 transitions. [2022-02-10 03:08:06,693 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2983 transitions. Word has length 17 [2022-02-10 03:08:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:06,693 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 2983 transitions. [2022-02-10 03:08:06,693 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) [2022-02-10 03:08:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2983 transitions. [2022-02-10 03:08:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:06,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:06,694 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:06,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-02-10 03:08:06,894 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 [2022-02-10 03:08:06,894 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:06,894 INFO L85 PathProgramCache]: Analyzing trace with hash -773925291, now seen corresponding path program 284 times [2022-02-10 03:08:06,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:06,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669761698] [2022-02-10 03:08:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:06,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:07,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:07,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669761698] [2022-02-10 03:08:07,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669761698] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:07,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585479157] [2022-02-10 03:08:07,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:07,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:07,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:07,003 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) [2022-02-10 03:08:07,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-02-10 03:08:07,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:07,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:07,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:07,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:07,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:07,192 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 29 treesize of output 23 [2022-02-10 03:08:07,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:07,194 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 21 treesize of output 2 [2022-02-10 03:08:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:07,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:07,319 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:07,319 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:08:07,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:07,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585479157] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:07,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:07,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:08:07,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889998041] [2022-02-10 03:08:07,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:07,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:07,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:07,333 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) [2022-02-10 03:08:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:07,624 INFO L93 Difference]: Finished difference Result 1279 states and 3691 transitions. [2022-02-10 03:08:07,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:08:07,625 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 [2022-02-10 03:08:07,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:07,626 INFO L225 Difference]: With dead ends: 1279 [2022-02-10 03:08:07,626 INFO L226 Difference]: Without dead ends: 1279 [2022-02-10 03:08:07,626 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 [2022-02-10 03:08:07,627 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 [2022-02-10 03:08:07,627 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] [2022-02-10 03:08:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-02-10 03:08:07,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1011. [2022-02-10 03:08:07,637 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) [2022-02-10 03:08:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2992 transitions. [2022-02-10 03:08:07,638 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2992 transitions. Word has length 17 [2022-02-10 03:08:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:07,638 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 2992 transitions. [2022-02-10 03:08:07,638 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) [2022-02-10 03:08:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2992 transitions. [2022-02-10 03:08:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:07,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:07,640 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:07,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-02-10 03:08:07,840 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 [2022-02-10 03:08:07,840 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1286934511, now seen corresponding path program 285 times [2022-02-10 03:08:07,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:07,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129589757] [2022-02-10 03:08:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:07,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:07,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:07,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129589757] [2022-02-10 03:08:07,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129589757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:07,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72465905] [2022-02-10 03:08:07,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:07,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:07,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:07,937 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) [2022-02-10 03:08:07,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-02-10 03:08:07,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:08:07,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:08,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:08,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:08,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:08,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:08,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:08,284 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:08,285 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-02-10 03:08:08,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:08,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72465905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:08,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:08,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:08:08,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887361893] [2022-02-10 03:08:08,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:08,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:08,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:08,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:08,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:08,299 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) [2022-02-10 03:08:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:08,611 INFO L93 Difference]: Finished difference Result 1283 states and 3699 transitions. [2022-02-10 03:08:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:08:08,611 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 [2022-02-10 03:08:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:08,613 INFO L225 Difference]: With dead ends: 1283 [2022-02-10 03:08:08,613 INFO L226 Difference]: Without dead ends: 1283 [2022-02-10 03:08:08,613 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 [2022-02-10 03:08:08,613 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 [2022-02-10 03:08:08,613 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] [2022-02-10 03:08:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-02-10 03:08:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1013. [2022-02-10 03:08:08,623 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) [2022-02-10 03:08:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2998 transitions. [2022-02-10 03:08:08,625 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2998 transitions. Word has length 17 [2022-02-10 03:08:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:08,625 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 2998 transitions. [2022-02-10 03:08:08,625 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) [2022-02-10 03:08:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2998 transitions. [2022-02-10 03:08:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:08,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:08,626 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:08,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-02-10 03:08:08,826 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 [2022-02-10 03:08:08,827 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash 156957297, now seen corresponding path program 286 times [2022-02-10 03:08:08,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:08,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692205225] [2022-02-10 03:08:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:08,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:08,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:08,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692205225] [2022-02-10 03:08:08,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692205225] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:08,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550439541] [2022-02-10 03:08:08,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:08,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:08,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:08,923 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) [2022-02-10 03:08:08,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-02-10 03:08:08,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:08,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:08,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:09,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:09,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:09,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:09,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:09,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:09,249 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:09,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:09,251 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 [2022-02-10 03:08:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:09,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550439541] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:09,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:09,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:08:09,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957693500] [2022-02-10 03:08:09,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:09,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:09,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:09,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:09,270 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) [2022-02-10 03:08:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:09,562 INFO L93 Difference]: Finished difference Result 1263 states and 3658 transitions. [2022-02-10 03:08:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:08:09,562 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 [2022-02-10 03:08:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:09,564 INFO L225 Difference]: With dead ends: 1263 [2022-02-10 03:08:09,564 INFO L226 Difference]: Without dead ends: 1259 [2022-02-10 03:08:09,564 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 [2022-02-10 03:08:09,564 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 [2022-02-10 03:08:09,564 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] [2022-02-10 03:08:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-02-10 03:08:09,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1013. [2022-02-10 03:08:09,574 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) [2022-02-10 03:08:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2997 transitions. [2022-02-10 03:08:09,576 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2997 transitions. Word has length 17 [2022-02-10 03:08:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:09,576 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 2997 transitions. [2022-02-10 03:08:09,576 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) [2022-02-10 03:08:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2997 transitions. [2022-02-10 03:08:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:09,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:09,577 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:09,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-02-10 03:08:09,777 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 [2022-02-10 03:08:09,778 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:09,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1934947405, now seen corresponding path program 287 times [2022-02-10 03:08:09,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:09,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409152360] [2022-02-10 03:08:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:09,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:09,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:09,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409152360] [2022-02-10 03:08:09,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409152360] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:09,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931192028] [2022-02-10 03:08:09,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:09,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:09,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:09,886 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) [2022-02-10 03:08:09,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-02-10 03:08:09,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:08:09,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:09,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:09,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:10,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:10,071 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 29 treesize of output 23 [2022-02-10 03:08:10,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:10,074 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:08:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:10,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:10,213 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:10,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:10,214 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 9 treesize of output 7 [2022-02-10 03:08:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:10,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931192028] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:10,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:10,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:08:10,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571762830] [2022-02-10 03:08:10,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:10,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:10,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:10,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:10,228 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) [2022-02-10 03:08:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:10,721 INFO L93 Difference]: Finished difference Result 1300 states and 3735 transitions. [2022-02-10 03:08:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:08:10,721 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 [2022-02-10 03:08:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:10,723 INFO L225 Difference]: With dead ends: 1300 [2022-02-10 03:08:10,723 INFO L226 Difference]: Without dead ends: 1300 [2022-02-10 03:08:10,723 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 [2022-02-10 03:08:10,723 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 [2022-02-10 03:08:10,723 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] [2022-02-10 03:08:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-02-10 03:08:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1017. [2022-02-10 03:08:10,733 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) [2022-02-10 03:08:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3009 transitions. [2022-02-10 03:08:10,735 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3009 transitions. Word has length 17 [2022-02-10 03:08:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:10,735 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 3009 transitions. [2022-02-10 03:08:10,735 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) [2022-02-10 03:08:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3009 transitions. [2022-02-10 03:08:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:10,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:10,736 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:10,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-02-10 03:08:10,936 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 [2022-02-10 03:08:10,937 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:10,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:10,937 INFO L85 PathProgramCache]: Analyzing trace with hash -380898281, now seen corresponding path program 288 times [2022-02-10 03:08:10,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:10,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471894095] [2022-02-10 03:08:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:10,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:11,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:11,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471894095] [2022-02-10 03:08:11,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471894095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:11,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752092132] [2022-02-10 03:08:11,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:11,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:11,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:11,037 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) [2022-02-10 03:08:11,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-02-10 03:08:11,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:08:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:11,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:11,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:11,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:11,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:11,236 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 31 treesize of output 25 [2022-02-10 03:08:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:11,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:11,380 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:11,380 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 38 treesize of output 31 [2022-02-10 03:08:11,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:11,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752092132] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:11,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:11,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:08:11,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684714960] [2022-02-10 03:08:11,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:11,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:11,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:11,399 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) [2022-02-10 03:08:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:11,762 INFO L93 Difference]: Finished difference Result 1270 states and 3670 transitions. [2022-02-10 03:08:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:08:11,762 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 [2022-02-10 03:08:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:11,764 INFO L225 Difference]: With dead ends: 1270 [2022-02-10 03:08:11,764 INFO L226 Difference]: Without dead ends: 1267 [2022-02-10 03:08:11,764 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 [2022-02-10 03:08:11,764 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 [2022-02-10 03:08:11,764 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] [2022-02-10 03:08:11,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-02-10 03:08:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1017. [2022-02-10 03:08:11,786 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) [2022-02-10 03:08:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3008 transitions. [2022-02-10 03:08:11,788 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3008 transitions. Word has length 17 [2022-02-10 03:08:11,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:11,788 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 3008 transitions. [2022-02-10 03:08:11,788 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) [2022-02-10 03:08:11,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3008 transitions. [2022-02-10 03:08:11,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:11,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:11,789 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:11,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-02-10 03:08:11,989 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 [2022-02-10 03:08:11,990 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1695305067, now seen corresponding path program 289 times [2022-02-10 03:08:11,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:11,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229528780] [2022-02-10 03:08:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:11,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:12,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:12,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229528780] [2022-02-10 03:08:12,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229528780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:12,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448049386] [2022-02-10 03:08:12,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:12,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:12,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:12,094 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) [2022-02-10 03:08:12,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-02-10 03:08:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:12,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:12,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:12,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:12,286 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 29 treesize of output 23 [2022-02-10 03:08:12,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:12,288 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 21 treesize of output 2 [2022-02-10 03:08:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:12,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:12,436 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:12,436 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 24 treesize of output 21 [2022-02-10 03:08:12,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:12,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448049386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:12,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:12,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:12,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003470419] [2022-02-10 03:08:12,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:12,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:12,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:12,451 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) [2022-02-10 03:08:13,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:13,676 INFO L93 Difference]: Finished difference Result 1401 states and 3911 transitions. [2022-02-10 03:08:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-10 03:08:13,677 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 [2022-02-10 03:08:13,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:13,679 INFO L225 Difference]: With dead ends: 1401 [2022-02-10 03:08:13,679 INFO L226 Difference]: Without dead ends: 1401 [2022-02-10 03:08:13,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 03:08:13,679 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 [2022-02-10 03:08:13,679 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] [2022-02-10 03:08:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-02-10 03:08:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1029. [2022-02-10 03:08:13,690 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) [2022-02-10 03:08:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3049 transitions. [2022-02-10 03:08:13,692 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3049 transitions. Word has length 17 [2022-02-10 03:08:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:13,692 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3049 transitions. [2022-02-10 03:08:13,692 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) [2022-02-10 03:08:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3049 transitions. [2022-02-10 03:08:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:13,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:13,693 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:13,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-02-10 03:08:13,894 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 [2022-02-10 03:08:13,894 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:13,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1679961521, now seen corresponding path program 290 times [2022-02-10 03:08:13,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:13,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524422483] [2022-02-10 03:08:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:13,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:13,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:13,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524422483] [2022-02-10 03:08:13,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524422483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:13,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128749574] [2022-02-10 03:08:13,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:13,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:13,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:13,998 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) [2022-02-10 03:08:13,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-02-10 03:08:14,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:14,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:14,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:14,206 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:08:14,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:14,208 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 31 treesize of output 25 [2022-02-10 03:08:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:14,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:14,372 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:14,372 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 38 treesize of output 31 [2022-02-10 03:08:14,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:14,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128749574] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:14,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:14,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:14,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986035561] [2022-02-10 03:08:14,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:14,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:14,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:14,391 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) [2022-02-10 03:08:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:14,779 INFO L93 Difference]: Finished difference Result 1285 states and 3717 transitions. [2022-02-10 03:08:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:08:14,780 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 [2022-02-10 03:08:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:14,781 INFO L225 Difference]: With dead ends: 1285 [2022-02-10 03:08:14,781 INFO L226 Difference]: Without dead ends: 1283 [2022-02-10 03:08:14,781 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 [2022-02-10 03:08:14,781 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 [2022-02-10 03:08:14,781 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] [2022-02-10 03:08:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-02-10 03:08:14,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1031. [2022-02-10 03:08:14,792 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) [2022-02-10 03:08:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3054 transitions. [2022-02-10 03:08:14,794 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3054 transitions. Word has length 17 [2022-02-10 03:08:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:14,794 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 3054 transitions. [2022-02-10 03:08:14,794 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) [2022-02-10 03:08:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3054 transitions. [2022-02-10 03:08:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:14,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:14,795 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:14,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-02-10 03:08:14,996 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 [2022-02-10 03:08:14,996 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:14,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:14,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1687574669, now seen corresponding path program 291 times [2022-02-10 03:08:14,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:14,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974303578] [2022-02-10 03:08:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:14,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:15,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:15,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974303578] [2022-02-10 03:08:15,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974303578] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:15,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105426560] [2022-02-10 03:08:15,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:15,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:15,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:15,093 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) [2022-02-10 03:08:15,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-02-10 03:08:15,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:08:15,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:15,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:15,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:15,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:15,248 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 43 treesize of output 35 [2022-02-10 03:08:15,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:15,249 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:08:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:15,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:15,431 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:15,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:15,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:15,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105426560] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:15,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:15,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:15,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754351885] [2022-02-10 03:08:15,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:15,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:15,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:15,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:15,445 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) [2022-02-10 03:08:16,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:16,830 INFO L93 Difference]: Finished difference Result 1452 states and 3962 transitions. [2022-02-10 03:08:16,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-10 03:08:16,831 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 [2022-02-10 03:08:16,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:16,833 INFO L225 Difference]: With dead ends: 1452 [2022-02-10 03:08:16,833 INFO L226 Difference]: Without dead ends: 1452 [2022-02-10 03:08:16,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=419, Invalid=2443, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:08:16,833 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:16,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 112 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:08:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2022-02-10 03:08:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1029. [2022-02-10 03:08:16,844 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) [2022-02-10 03:08:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3048 transitions. [2022-02-10 03:08:16,846 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3048 transitions. Word has length 17 [2022-02-10 03:08:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:16,846 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3048 transitions. [2022-02-10 03:08:16,846 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) [2022-02-10 03:08:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3048 transitions. [2022-02-10 03:08:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:16,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:16,847 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:16,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-02-10 03:08:17,047 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 [2022-02-10 03:08:17,048 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash -885958441, now seen corresponding path program 292 times [2022-02-10 03:08:17,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:17,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604871386] [2022-02-10 03:08:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:17,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:17,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:17,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604871386] [2022-02-10 03:08:17,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604871386] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:17,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947762485] [2022-02-10 03:08:17,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:17,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:17,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:17,158 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) [2022-02-10 03:08:17,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-02-10 03:08:17,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:17,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:17,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:17,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:17,324 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 43 treesize of output 35 [2022-02-10 03:08:17,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:17,326 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 35 treesize of output 27 [2022-02-10 03:08:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:17,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:17,537 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:17,538 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-02-10 03:08:17,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:17,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947762485] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:17,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:17,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:08:17,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403443573] [2022-02-10 03:08:17,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:17,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:17,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:17,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:17,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:17,563 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) [2022-02-10 03:08:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:18,143 INFO L93 Difference]: Finished difference Result 1308 states and 3745 transitions. [2022-02-10 03:08:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:08:18,143 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 [2022-02-10 03:08:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:18,145 INFO L225 Difference]: With dead ends: 1308 [2022-02-10 03:08:18,145 INFO L226 Difference]: Without dead ends: 1306 [2022-02-10 03:08:18,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:08:18,145 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 [2022-02-10 03:08:18,145 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] [2022-02-10 03:08:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-02-10 03:08:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1031. [2022-02-10 03:08:18,155 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) [2022-02-10 03:08:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3054 transitions. [2022-02-10 03:08:18,165 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3054 transitions. Word has length 17 [2022-02-10 03:08:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:18,165 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 3054 transitions. [2022-02-10 03:08:18,165 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) [2022-02-10 03:08:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3054 transitions. [2022-02-10 03:08:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:18,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:18,166 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:18,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-02-10 03:08:18,366 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 [2022-02-10 03:08:18,367 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash 832385265, now seen corresponding path program 293 times [2022-02-10 03:08:18,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:18,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813627103] [2022-02-10 03:08:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:18,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:18,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:18,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813627103] [2022-02-10 03:08:18,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813627103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:18,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123237044] [2022-02-10 03:08:18,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:18,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:18,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:18,473 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) [2022-02-10 03:08:18,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-02-10 03:08:18,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:08:18,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:18,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:18,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:18,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:18,631 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 43 treesize of output 35 [2022-02-10 03:08:18,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:18,633 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 35 treesize of output 27 [2022-02-10 03:08:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:18,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:18,807 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:08:18,807 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 38 treesize of output 31 [2022-02-10 03:08:18,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:18,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123237044] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:18,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:18,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:18,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817090385] [2022-02-10 03:08:18,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:18,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:18,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:18,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:18,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:18,826 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) [2022-02-10 03:08:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:19,227 INFO L93 Difference]: Finished difference Result 1298 states and 3732 transitions. [2022-02-10 03:08:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:08:19,227 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 [2022-02-10 03:08:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:19,229 INFO L225 Difference]: With dead ends: 1298 [2022-02-10 03:08:19,229 INFO L226 Difference]: Without dead ends: 1298 [2022-02-10 03:08:19,229 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 [2022-02-10 03:08:19,229 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:19,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 110 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-02-10 03:08:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1029. [2022-02-10 03:08:19,240 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) [2022-02-10 03:08:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3046 transitions. [2022-02-10 03:08:19,241 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3046 transitions. Word has length 17 [2022-02-10 03:08:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:19,241 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3046 transitions. [2022-02-10 03:08:19,241 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) [2022-02-10 03:08:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3046 transitions. [2022-02-10 03:08:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:19,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:19,242 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:19,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:19,443 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 [2022-02-10 03:08:19,443 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash 111872989, now seen corresponding path program 294 times [2022-02-10 03:08:19,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:19,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635543948] [2022-02-10 03:08:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:19,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:19,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:19,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635543948] [2022-02-10 03:08:19,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635543948] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:19,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268919581] [2022-02-10 03:08:19,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:19,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:19,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:19,539 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) [2022-02-10 03:08:19,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-02-10 03:08:19,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:08:19,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:19,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:19,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:19,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:19,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:19,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:19,706 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 21 treesize of output 2 [2022-02-10 03:08:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:19,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:19,811 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:19,811 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:08:19,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:19,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268919581] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:19,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:19,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:19,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014416529] [2022-02-10 03:08:19,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:19,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:19,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:19,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:19,830 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) [2022-02-10 03:08:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:20,005 INFO L93 Difference]: Finished difference Result 1124 states and 3264 transitions. [2022-02-10 03:08:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:08:20,006 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 [2022-02-10 03:08:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:20,007 INFO L225 Difference]: With dead ends: 1124 [2022-02-10 03:08:20,007 INFO L226 Difference]: Without dead ends: 1124 [2022-02-10 03:08:20,007 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 [2022-02-10 03:08:20,007 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:20,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 58 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 405 Invalid, 0 Unknown, 193 Unchecked, 0.1s Time] [2022-02-10 03:08:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-02-10 03:08:20,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1036. [2022-02-10 03:08:20,017 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) [2022-02-10 03:08:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3068 transitions. [2022-02-10 03:08:20,019 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3068 transitions. Word has length 17 [2022-02-10 03:08:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:20,019 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 3068 transitions. [2022-02-10 03:08:20,019 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) [2022-02-10 03:08:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3068 transitions. [2022-02-10 03:08:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:20,020 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:20,020 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:20,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-02-10 03:08:20,220 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 [2022-02-10 03:08:20,220 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1042755577, now seen corresponding path program 295 times [2022-02-10 03:08:20,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:20,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18458222] [2022-02-10 03:08:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:20,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:20,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:20,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18458222] [2022-02-10 03:08:20,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18458222] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:20,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700508176] [2022-02-10 03:08:20,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:20,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:20,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:20,311 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) [2022-02-10 03:08:20,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-02-10 03:08:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:20,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:20,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:20,499 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 37 treesize of output 31 [2022-02-10 03:08:20,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:20,501 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 31 treesize of output 25 [2022-02-10 03:08:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:20,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:20,620 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:20,621 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 42 treesize of output 35 [2022-02-10 03:08:20,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:20,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700508176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:20,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:20,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:20,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465156861] [2022-02-10 03:08:20,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:20,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:20,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:20,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:20,644 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) [2022-02-10 03:08:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:20,843 INFO L93 Difference]: Finished difference Result 1114 states and 3241 transitions. [2022-02-10 03:08:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:08:20,844 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 [2022-02-10 03:08:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:20,845 INFO L225 Difference]: With dead ends: 1114 [2022-02-10 03:08:20,845 INFO L226 Difference]: Without dead ends: 1109 [2022-02-10 03:08:20,845 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 [2022-02-10 03:08:20,845 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 [2022-02-10 03:08:20,845 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] [2022-02-10 03:08:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-02-10 03:08:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1036. [2022-02-10 03:08:20,855 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) [2022-02-10 03:08:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3067 transitions. [2022-02-10 03:08:20,856 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3067 transitions. Word has length 17 [2022-02-10 03:08:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:20,856 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 3067 transitions. [2022-02-10 03:08:20,856 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) [2022-02-10 03:08:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3067 transitions. [2022-02-10 03:08:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:20,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:20,858 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:20,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-02-10 03:08:21,058 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 [2022-02-10 03:08:21,058 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1049149125, now seen corresponding path program 296 times [2022-02-10 03:08:21,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:21,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944076838] [2022-02-10 03:08:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:21,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:21,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:21,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944076838] [2022-02-10 03:08:21,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944076838] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:21,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345224131] [2022-02-10 03:08:21,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:21,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:21,157 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) [2022-02-10 03:08:21,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-02-10 03:08:21,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:21,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:21,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:21,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:21,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:21,334 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 21 treesize of output 2 [2022-02-10 03:08:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:21,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:21,450 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:21,451 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:08:21,452 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 [2022-02-10 03:08:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:21,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345224131] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:21,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:21,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:08:21,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86108444] [2022-02-10 03:08:21,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:21,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:21,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:21,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:21,469 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) [2022-02-10 03:08:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:21,803 INFO L93 Difference]: Finished difference Result 1141 states and 3296 transitions. [2022-02-10 03:08:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:08:21,804 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 [2022-02-10 03:08:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:21,805 INFO L225 Difference]: With dead ends: 1141 [2022-02-10 03:08:21,805 INFO L226 Difference]: Without dead ends: 1138 [2022-02-10 03:08:21,805 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 [2022-02-10 03:08:21,805 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 [2022-02-10 03:08:21,805 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] [2022-02-10 03:08:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-02-10 03:08:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1032. [2022-02-10 03:08:21,814 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) [2022-02-10 03:08:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3054 transitions. [2022-02-10 03:08:21,816 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3054 transitions. Word has length 17 [2022-02-10 03:08:21,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:21,816 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 3054 transitions. [2022-02-10 03:08:21,816 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) [2022-02-10 03:08:21,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3054 transitions. [2022-02-10 03:08:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:21,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:21,817 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:21,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:22,018 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 [2022-02-10 03:08:22,018 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:22,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:22,018 INFO L85 PathProgramCache]: Analyzing trace with hash 504899999, now seen corresponding path program 297 times [2022-02-10 03:08:22,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:22,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692505957] [2022-02-10 03:08:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:22,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:22,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:22,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692505957] [2022-02-10 03:08:22,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692505957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:22,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603693360] [2022-02-10 03:08:22,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:22,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:22,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:22,111 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) [2022-02-10 03:08:22,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-02-10 03:08:22,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:08:22,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:22,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:22,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:22,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:22,302 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:08:22,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:22,303 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 31 treesize of output 25 [2022-02-10 03:08:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:22,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:22,430 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:22,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:22,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:22,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603693360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:22,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:22,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:08:22,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843598573] [2022-02-10 03:08:22,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:22,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:22,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:22,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:22,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:22,453 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) [2022-02-10 03:08:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:22,651 INFO L93 Difference]: Finished difference Result 1102 states and 3219 transitions. [2022-02-10 03:08:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:08:22,651 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 [2022-02-10 03:08:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:22,652 INFO L225 Difference]: With dead ends: 1102 [2022-02-10 03:08:22,653 INFO L226 Difference]: Without dead ends: 1096 [2022-02-10 03:08:22,653 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 [2022-02-10 03:08:22,653 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 [2022-02-10 03:08:22,653 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] [2022-02-10 03:08:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-02-10 03:08:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1032. [2022-02-10 03:08:22,662 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) [2022-02-10 03:08:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3052 transitions. [2022-02-10 03:08:22,664 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3052 transitions. Word has length 17 [2022-02-10 03:08:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:22,664 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 3052 transitions. [2022-02-10 03:08:22,664 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) [2022-02-10 03:08:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3052 transitions. [2022-02-10 03:08:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:22,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:22,665 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:22,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-02-10 03:08:22,865 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 [2022-02-10 03:08:22,865 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:22,866 INFO L85 PathProgramCache]: Analyzing trace with hash -809506787, now seen corresponding path program 298 times [2022-02-10 03:08:22,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:22,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660473583] [2022-02-10 03:08:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:22,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:22,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:22,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660473583] [2022-02-10 03:08:22,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660473583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:22,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198084432] [2022-02-10 03:08:22,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:22,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:22,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:22,968 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) [2022-02-10 03:08:22,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-02-10 03:08:22,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:22,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:22,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:22,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:23,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:23,146 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:08:23,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:23,148 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:08:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:23,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:23,278 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:23,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:23,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:23,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198084432] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:23,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:23,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:08:23,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829259655] [2022-02-10 03:08:23,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:23,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:23,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:23,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:23,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:23,296 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) [2022-02-10 03:08:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:24,159 INFO L93 Difference]: Finished difference Result 1217 states and 3448 transitions. [2022-02-10 03:08:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:08:24,159 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 [2022-02-10 03:08:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:24,161 INFO L225 Difference]: With dead ends: 1217 [2022-02-10 03:08:24,161 INFO L226 Difference]: Without dead ends: 1217 [2022-02-10 03:08:24,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=298, Invalid=1508, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:08:24,162 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:24,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 118 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 722 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-02-10 03:08:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-02-10 03:08:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1047. [2022-02-10 03:08:24,176 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) [2022-02-10 03:08:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3102 transitions. [2022-02-10 03:08:24,178 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3102 transitions. Word has length 17 [2022-02-10 03:08:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:24,178 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3102 transitions. [2022-02-10 03:08:24,178 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) [2022-02-10 03:08:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3102 transitions. [2022-02-10 03:08:24,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:24,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:24,179 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:24,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-02-10 03:08:24,380 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 [2022-02-10 03:08:24,380 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:24,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1729207495, now seen corresponding path program 299 times [2022-02-10 03:08:24,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:24,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892996423] [2022-02-10 03:08:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:24,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:24,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:24,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892996423] [2022-02-10 03:08:24,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892996423] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:24,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8623963] [2022-02-10 03:08:24,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:24,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:24,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:24,477 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) [2022-02-10 03:08:24,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-02-10 03:08:24,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:08:24,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:24,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:24,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:24,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:24,664 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 37 treesize of output 31 [2022-02-10 03:08:24,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:24,665 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 31 treesize of output 25 [2022-02-10 03:08:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:24,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:24,801 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:24,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:24,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:24,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8623963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:24,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:24,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:08:24,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613494942] [2022-02-10 03:08:24,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:24,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:24,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:24,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:24,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:24,836 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) [2022-02-10 03:08:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:25,161 INFO L93 Difference]: Finished difference Result 1133 states and 3297 transitions. [2022-02-10 03:08:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:08:25,162 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 [2022-02-10 03:08:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:25,163 INFO L225 Difference]: With dead ends: 1133 [2022-02-10 03:08:25,163 INFO L226 Difference]: Without dead ends: 1131 [2022-02-10 03:08:25,164 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 [2022-02-10 03:08:25,164 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 [2022-02-10 03:08:25,164 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] [2022-02-10 03:08:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-02-10 03:08:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1052. [2022-02-10 03:08:25,173 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) [2022-02-10 03:08:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3117 transitions. [2022-02-10 03:08:25,175 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3117 transitions. Word has length 17 [2022-02-10 03:08:25,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:25,175 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 3117 transitions. [2022-02-10 03:08:25,175 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) [2022-02-10 03:08:25,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3117 transitions. [2022-02-10 03:08:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:25,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:25,177 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:25,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:25,377 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 [2022-02-10 03:08:25,377 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:25,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:25,377 INFO L85 PathProgramCache]: Analyzing trace with hash -801776389, now seen corresponding path program 300 times [2022-02-10 03:08:25,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:25,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926347302] [2022-02-10 03:08:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:25,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:25,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:25,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926347302] [2022-02-10 03:08:25,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926347302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:25,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418434056] [2022-02-10 03:08:25,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:25,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:25,483 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) [2022-02-10 03:08:25,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-02-10 03:08:25,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:08:25,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:25,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:25,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:25,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:25,626 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 43 treesize of output 35 [2022-02-10 03:08:25,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:25,628 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 35 treesize of output 27 [2022-02-10 03:08:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:25,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:25,793 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:25,793 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:08:25,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:25,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418434056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:25,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:25,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:08:25,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504799709] [2022-02-10 03:08:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:25,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:25,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:25,812 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) [2022-02-10 03:08:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:26,901 INFO L93 Difference]: Finished difference Result 1295 states and 3539 transitions. [2022-02-10 03:08:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-10 03:08:26,901 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 [2022-02-10 03:08:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:26,903 INFO L225 Difference]: With dead ends: 1295 [2022-02-10 03:08:26,903 INFO L226 Difference]: Without dead ends: 1295 [2022-02-10 03:08:26,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-02-10 03:08:26,903 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 145 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-10 03:08:26,903 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] [2022-02-10 03:08:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2022-02-10 03:08:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1039. [2022-02-10 03:08:26,913 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) [2022-02-10 03:08:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3074 transitions. [2022-02-10 03:08:26,915 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3074 transitions. Word has length 17 [2022-02-10 03:08:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:26,915 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 3074 transitions. [2022-02-10 03:08:26,915 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) [2022-02-10 03:08:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3074 transitions. [2022-02-10 03:08:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:26,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:26,916 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:26,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-02-10 03:08:27,116 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 [2022-02-10 03:08:27,117 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash -160161, now seen corresponding path program 301 times [2022-02-10 03:08:27,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:27,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271803082] [2022-02-10 03:08:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:27,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:27,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:27,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271803082] [2022-02-10 03:08:27,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271803082] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:27,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894027093] [2022-02-10 03:08:27,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:27,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:27,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:27,217 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) [2022-02-10 03:08:27,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-02-10 03:08:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:27,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:27,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:27,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:27,365 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 35 treesize of output 27 [2022-02-10 03:08:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:27,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:27,547 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:27,547 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 42 treesize of output 35 [2022-02-10 03:08:27,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:27,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894027093] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:27,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:27,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:27,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064426535] [2022-02-10 03:08:27,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:27,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:27,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:27,570 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) [2022-02-10 03:08:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:27,911 INFO L93 Difference]: Finished difference Result 1140 states and 3282 transitions. [2022-02-10 03:08:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:08:27,911 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 [2022-02-10 03:08:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:27,913 INFO L225 Difference]: With dead ends: 1140 [2022-02-10 03:08:27,913 INFO L226 Difference]: Without dead ends: 1137 [2022-02-10 03:08:27,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:08:27,913 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 [2022-02-10 03:08:27,913 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] [2022-02-10 03:08:27,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-02-10 03:08:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1042. [2022-02-10 03:08:27,928 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) [2022-02-10 03:08:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3083 transitions. [2022-02-10 03:08:27,930 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3083 transitions. Word has length 17 [2022-02-10 03:08:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:27,930 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 3083 transitions. [2022-02-10 03:08:27,930 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) [2022-02-10 03:08:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3083 transitions. [2022-02-10 03:08:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:27,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:27,932 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:27,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-02-10 03:08:28,132 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 [2022-02-10 03:08:28,132 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:28,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1718183545, now seen corresponding path program 302 times [2022-02-10 03:08:28,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:28,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081495959] [2022-02-10 03:08:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:28,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:28,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:28,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081495959] [2022-02-10 03:08:28,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081495959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:28,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427899447] [2022-02-10 03:08:28,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:28,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:28,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:28,233 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) [2022-02-10 03:08:28,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-02-10 03:08:28,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:28,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:28,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:28,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:28,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:28,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:28,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:28,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:28,537 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:28,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:28,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:28,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427899447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:28,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:28,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:08:28,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032171563] [2022-02-10 03:08:28,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:28,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:28,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:28,561 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) [2022-02-10 03:08:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:28,845 INFO L93 Difference]: Finished difference Result 1137 states and 3279 transitions. [2022-02-10 03:08:28,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:08:28,845 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 [2022-02-10 03:08:28,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:28,847 INFO L225 Difference]: With dead ends: 1137 [2022-02-10 03:08:28,847 INFO L226 Difference]: Without dead ends: 1137 [2022-02-10 03:08:28,847 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 [2022-02-10 03:08:28,847 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 [2022-02-10 03:08:28,847 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] [2022-02-10 03:08:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-02-10 03:08:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1036. [2022-02-10 03:08:28,857 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) [2022-02-10 03:08:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3064 transitions. [2022-02-10 03:08:28,858 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3064 transitions. Word has length 17 [2022-02-10 03:08:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:28,859 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 3064 transitions. [2022-02-10 03:08:28,859 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) [2022-02-10 03:08:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3064 transitions. [2022-02-10 03:08:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:28,860 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:28,860 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:28,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:29,060 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 [2022-02-10 03:08:29,060 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2143240713, now seen corresponding path program 303 times [2022-02-10 03:08:29,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:29,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268400770] [2022-02-10 03:08:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:29,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:29,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:29,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268400770] [2022-02-10 03:08:29,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268400770] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:29,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662183384] [2022-02-10 03:08:29,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:29,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:29,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:29,150 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) [2022-02-10 03:08:29,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-02-10 03:08:29,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:08:29,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:29,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:29,312 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 29 treesize of output 23 [2022-02-10 03:08:29,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:29,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:29,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:29,415 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:29,415 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 30 treesize of output 27 [2022-02-10 03:08:29,417 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 13 treesize of output 9 [2022-02-10 03:08:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:29,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662183384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:29,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:29,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:29,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927306005] [2022-02-10 03:08:29,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:29,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:29,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:29,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:29,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:29,438 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) [2022-02-10 03:08:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:29,658 INFO L93 Difference]: Finished difference Result 1138 states and 3295 transitions. [2022-02-10 03:08:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:08:29,659 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 [2022-02-10 03:08:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:29,660 INFO L225 Difference]: With dead ends: 1138 [2022-02-10 03:08:29,660 INFO L226 Difference]: Without dead ends: 1138 [2022-02-10 03:08:29,660 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 [2022-02-10 03:08:29,660 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:29,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 24 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 425 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-02-10 03:08:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-02-10 03:08:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1039. [2022-02-10 03:08:29,670 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) [2022-02-10 03:08:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3073 transitions. [2022-02-10 03:08:29,672 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3073 transitions. Word has length 17 [2022-02-10 03:08:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:29,672 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 3073 transitions. [2022-02-10 03:08:29,672 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) [2022-02-10 03:08:29,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3073 transitions. [2022-02-10 03:08:29,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:29,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:29,673 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:29,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:29,873 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 [2022-02-10 03:08:29,873 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:29,874 INFO L85 PathProgramCache]: Analyzing trace with hash -589191589, now seen corresponding path program 304 times [2022-02-10 03:08:29,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:29,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104560481] [2022-02-10 03:08:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:29,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:29,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:29,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104560481] [2022-02-10 03:08:29,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104560481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:29,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176898304] [2022-02-10 03:08:29,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:29,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:29,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:29,962 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) [2022-02-10 03:08:29,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-02-10 03:08:29,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:29,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:29,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:29,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:30,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:30,136 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 37 treesize of output 31 [2022-02-10 03:08:30,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:30,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:30,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:30,242 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:30,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:30,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:30,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176898304] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:30,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:30,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:30,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050240869] [2022-02-10 03:08:30,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:30,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:30,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:30,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:30,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:30,274 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) [2022-02-10 03:08:30,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:30,552 INFO L93 Difference]: Finished difference Result 1114 states and 3243 transitions. [2022-02-10 03:08:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:08:30,552 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 [2022-02-10 03:08:30,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:30,554 INFO L225 Difference]: With dead ends: 1114 [2022-02-10 03:08:30,554 INFO L226 Difference]: Without dead ends: 1108 [2022-02-10 03:08:30,554 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 [2022-02-10 03:08:30,554 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:30,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 410 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-02-10 03:08:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-02-10 03:08:30,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1039. [2022-02-10 03:08:30,564 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) [2022-02-10 03:08:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3070 transitions. [2022-02-10 03:08:30,566 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3070 transitions. Word has length 17 [2022-02-10 03:08:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:30,566 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 3070 transitions. [2022-02-10 03:08:30,566 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) [2022-02-10 03:08:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3070 transitions. [2022-02-10 03:08:30,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:30,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:30,567 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:30,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:30,767 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 [2022-02-10 03:08:30,768 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:30,768 INFO L85 PathProgramCache]: Analyzing trace with hash -288346791, now seen corresponding path program 305 times [2022-02-10 03:08:30,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:30,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540249721] [2022-02-10 03:08:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:30,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:30,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:30,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540249721] [2022-02-10 03:08:30,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540249721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:30,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745700531] [2022-02-10 03:08:30,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:30,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:30,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:30,864 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) [2022-02-10 03:08:30,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-02-10 03:08:30,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:08:30,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:30,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:30,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:30,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:30,994 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 [2022-02-10 03:08:30,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:30,996 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 [2022-02-10 03:08:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:31,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:31,144 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:31,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:31,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:31,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745700531] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:31,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:31,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:08:31,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103708554] [2022-02-10 03:08:31,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:31,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:31,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:31,167 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) [2022-02-10 03:08:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:32,012 INFO L93 Difference]: Finished difference Result 1193 states and 3391 transitions. [2022-02-10 03:08:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-10 03:08:32,012 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 [2022-02-10 03:08:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:32,013 INFO L225 Difference]: With dead ends: 1193 [2022-02-10 03:08:32,014 INFO L226 Difference]: Without dead ends: 1191 [2022-02-10 03:08:32,014 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 [2022-02-10 03:08:32,014 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 [2022-02-10 03:08:32,014 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] [2022-02-10 03:08:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-02-10 03:08:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1054. [2022-02-10 03:08:32,024 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) [2022-02-10 03:08:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3122 transitions. [2022-02-10 03:08:32,026 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3122 transitions. Word has length 17 [2022-02-10 03:08:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:32,026 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 3122 transitions. [2022-02-10 03:08:32,026 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) [2022-02-10 03:08:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3122 transitions. [2022-02-10 03:08:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:32,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:32,027 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:32,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:32,227 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 [2022-02-10 03:08:32,227 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash -830512995, now seen corresponding path program 306 times [2022-02-10 03:08:32,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:32,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737435259] [2022-02-10 03:08:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:32,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:32,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:32,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737435259] [2022-02-10 03:08:32,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737435259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:32,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454402504] [2022-02-10 03:08:32,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:32,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:32,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:32,313 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) [2022-02-10 03:08:32,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-02-10 03:08:32,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:08:32,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:32,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:32,465 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 29 treesize of output 23 [2022-02-10 03:08:32,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:32,468 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 21 treesize of output 2 [2022-02-10 03:08:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:32,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:32,561 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:08:32,562 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:08:32,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:32,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454402504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:32,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:32,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:32,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923927991] [2022-02-10 03:08:32,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:32,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:32,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:32,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:32,586 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) [2022-02-10 03:08:33,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:33,002 INFO L93 Difference]: Finished difference Result 1270 states and 3566 transitions. [2022-02-10 03:08:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:08:33,003 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 [2022-02-10 03:08:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:33,004 INFO L225 Difference]: With dead ends: 1270 [2022-02-10 03:08:33,004 INFO L226 Difference]: Without dead ends: 1270 [2022-02-10 03:08:33,004 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 [2022-02-10 03:08:33,005 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 [2022-02-10 03:08:33,005 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] [2022-02-10 03:08:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2022-02-10 03:08:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1080. [2022-02-10 03:08:33,015 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) [2022-02-10 03:08:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3208 transitions. [2022-02-10 03:08:33,017 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3208 transitions. Word has length 17 [2022-02-10 03:08:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:33,017 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 3208 transitions. [2022-02-10 03:08:33,017 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) [2022-02-10 03:08:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3208 transitions. [2022-02-10 03:08:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:33,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:33,018 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:33,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:33,218 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 [2022-02-10 03:08:33,218 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1750213703, now seen corresponding path program 307 times [2022-02-10 03:08:33,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:33,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037427496] [2022-02-10 03:08:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:33,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:33,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:33,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037427496] [2022-02-10 03:08:33,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037427496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:33,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336854954] [2022-02-10 03:08:33,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:33,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:33,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:33,302 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) [2022-02-10 03:08:33,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-02-10 03:08:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:33,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:33,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:33,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:33,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:33,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:33,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:33,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:33,558 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:08:33,558 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 42 treesize of output 33 [2022-02-10 03:08:33,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:33,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336854954] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:33,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:33,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:33,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460437586] [2022-02-10 03:08:33,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:33,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:33,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:33,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:33,587 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) [2022-02-10 03:08:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:34,106 INFO L93 Difference]: Finished difference Result 1198 states and 3429 transitions. [2022-02-10 03:08:34,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:08:34,106 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 [2022-02-10 03:08:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:34,108 INFO L225 Difference]: With dead ends: 1198 [2022-02-10 03:08:34,108 INFO L226 Difference]: Without dead ends: 1194 [2022-02-10 03:08:34,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:08:34,108 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 [2022-02-10 03:08:34,109 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] [2022-02-10 03:08:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-02-10 03:08:34,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1080. [2022-02-10 03:08:34,125 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) [2022-02-10 03:08:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3199 transitions. [2022-02-10 03:08:34,127 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3199 transitions. Word has length 17 [2022-02-10 03:08:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:34,127 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 3199 transitions. [2022-02-10 03:08:34,127 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) [2022-02-10 03:08:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3199 transitions. [2022-02-10 03:08:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:34,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:34,128 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:34,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-02-10 03:08:34,331 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 [2022-02-10 03:08:34,331 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash 784738589, now seen corresponding path program 308 times [2022-02-10 03:08:34,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:34,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935017333] [2022-02-10 03:08:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:34,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:34,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:34,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935017333] [2022-02-10 03:08:34,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935017333] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:34,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582434200] [2022-02-10 03:08:34,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:34,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:34,414 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) [2022-02-10 03:08:34,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-02-10 03:08:34,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:34,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:34,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:34,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:34,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:34,526 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 [2022-02-10 03:08:34,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:34,528 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 [2022-02-10 03:08:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:34,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:34,656 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:08:34,657 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 28 treesize of output 23 [2022-02-10 03:08:34,658 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 11 treesize of output 7 [2022-02-10 03:08:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:34,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582434200] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:34,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:34,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:34,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844360464] [2022-02-10 03:08:34,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:34,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:34,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:34,680 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) [2022-02-10 03:08:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:35,734 INFO L93 Difference]: Finished difference Result 1310 states and 3612 transitions. [2022-02-10 03:08:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-10 03:08:35,734 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 [2022-02-10 03:08:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:35,736 INFO L225 Difference]: With dead ends: 1310 [2022-02-10 03:08:35,736 INFO L226 Difference]: Without dead ends: 1307 [2022-02-10 03:08:35,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=315, Invalid=2441, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 03:08:35,736 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:35,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 240 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:08:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-02-10 03:08:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1079. [2022-02-10 03:08:35,746 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) [2022-02-10 03:08:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3181 transitions. [2022-02-10 03:08:35,748 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3181 transitions. Word has length 17 [2022-02-10 03:08:35,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:35,748 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 3181 transitions. [2022-02-10 03:08:35,748 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) [2022-02-10 03:08:35,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3181 transitions. [2022-02-10 03:08:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:35,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:35,749 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:35,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-02-10 03:08:35,949 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 [2022-02-10 03:08:35,950 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1982779703, now seen corresponding path program 309 times [2022-02-10 03:08:35,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:35,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893947472] [2022-02-10 03:08:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:35,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:36,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:36,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893947472] [2022-02-10 03:08:36,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893947472] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:36,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003232498] [2022-02-10 03:08:36,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:36,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:36,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:36,036 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) [2022-02-10 03:08:36,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-02-10 03:08:36,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:08:36,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:08:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:36,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:36,151 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 [2022-02-10 03:08:36,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:36,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:36,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:36,276 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:08:36,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:36,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:36,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003232498] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:36,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:36,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:36,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988578746] [2022-02-10 03:08:36,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:36,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:36,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:36,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:36,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:36,304 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) [2022-02-10 03:08:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:36,807 INFO L93 Difference]: Finished difference Result 1327 states and 3744 transitions. [2022-02-10 03:08:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:08:36,807 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 [2022-02-10 03:08:36,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:36,809 INFO L225 Difference]: With dead ends: 1327 [2022-02-10 03:08:36,809 INFO L226 Difference]: Without dead ends: 1327 [2022-02-10 03:08:36,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:08:36,809 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:36,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 108 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:08:36,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-02-10 03:08:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1140. [2022-02-10 03:08:36,827 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) [2022-02-10 03:08:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3405 transitions. [2022-02-10 03:08:36,828 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3405 transitions. Word has length 17 [2022-02-10 03:08:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:36,829 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3405 transitions. [2022-02-10 03:08:36,829 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) [2022-02-10 03:08:36,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3405 transitions. [2022-02-10 03:08:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:36,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:36,830 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:36,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-02-10 03:08:37,030 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 [2022-02-10 03:08:37,030 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:37,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1510571365, now seen corresponding path program 310 times [2022-02-10 03:08:37,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:37,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506117454] [2022-02-10 03:08:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:37,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:37,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:37,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506117454] [2022-02-10 03:08:37,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506117454] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:37,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155200037] [2022-02-10 03:08:37,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:37,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:37,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:37,113 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) [2022-02-10 03:08:37,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-02-10 03:08:37,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:37,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:37,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:37,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:37,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:37,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:37,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:37,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:37,365 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:08:37,365 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:08:37,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:37,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155200037] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:37,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:37,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:37,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902363032] [2022-02-10 03:08:37,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:37,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:37,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:37,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:37,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:37,389 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) [2022-02-10 03:08:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:38,117 INFO L93 Difference]: Finished difference Result 1362 states and 3831 transitions. [2022-02-10 03:08:38,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-10 03:08:38,117 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 [2022-02-10 03:08:38,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:38,119 INFO L225 Difference]: With dead ends: 1362 [2022-02-10 03:08:38,119 INFO L226 Difference]: Without dead ends: 1358 [2022-02-10 03:08:38,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2022-02-10 03:08:38,120 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:38,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 132 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:08:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-02-10 03:08:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1163. [2022-02-10 03:08:38,140 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) [2022-02-10 03:08:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3474 transitions. [2022-02-10 03:08:38,141 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3474 transitions. Word has length 17 [2022-02-10 03:08:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:38,142 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 3474 transitions. [2022-02-10 03:08:38,142 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) [2022-02-10 03:08:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3474 transitions. [2022-02-10 03:08:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:38,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:38,143 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:38,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:38,343 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 [2022-02-10 03:08:38,343 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash 207772341, now seen corresponding path program 311 times [2022-02-10 03:08:38,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:38,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908455236] [2022-02-10 03:08:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:38,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:38,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:38,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908455236] [2022-02-10 03:08:38,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908455236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:38,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725566568] [2022-02-10 03:08:38,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:38,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:38,427 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) [2022-02-10 03:08:38,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-02-10 03:08:38,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:08:38,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:38,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:38,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:38,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:38,542 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 [2022-02-10 03:08:38,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:38,543 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 35 treesize of output 27 [2022-02-10 03:08:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:38,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:38,667 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:08:38,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:38,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:38,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725566568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:38,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:38,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:38,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432465335] [2022-02-10 03:08:38,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:38,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:38,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:38,691 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) [2022-02-10 03:08:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:39,171 INFO L93 Difference]: Finished difference Result 1345 states and 3790 transitions. [2022-02-10 03:08:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:08:39,171 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 [2022-02-10 03:08:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:39,173 INFO L225 Difference]: With dead ends: 1345 [2022-02-10 03:08:39,173 INFO L226 Difference]: Without dead ends: 1345 [2022-02-10 03:08:39,174 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 [2022-02-10 03:08:39,174 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:08:39,174 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] [2022-02-10 03:08:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-02-10 03:08:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1142. [2022-02-10 03:08:39,185 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) [2022-02-10 03:08:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3395 transitions. [2022-02-10 03:08:39,187 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3395 transitions. Word has length 17 [2022-02-10 03:08:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:39,187 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 3395 transitions. [2022-02-10 03:08:39,187 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) [2022-02-10 03:08:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3395 transitions. [2022-02-10 03:08:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:39,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:39,188 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:39,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-02-10 03:08:39,389 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 [2022-02-10 03:08:39,389 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:39,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1502840967, now seen corresponding path program 312 times [2022-02-10 03:08:39,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:39,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947748904] [2022-02-10 03:08:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:39,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:39,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:39,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947748904] [2022-02-10 03:08:39,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947748904] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:39,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488314709] [2022-02-10 03:08:39,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:39,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:39,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:39,475 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) [2022-02-10 03:08:39,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-02-10 03:08:39,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:08:39,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:39,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:39,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:39,623 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 29 treesize of output 23 [2022-02-10 03:08:39,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:39,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:39,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:39,628 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 8 treesize of output 1 [2022-02-10 03:08:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:39,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:39,731 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:08:39,731 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 28 treesize of output 23 [2022-02-10 03:08:39,732 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 11 treesize of output 7 [2022-02-10 03:08:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:39,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488314709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:39,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:39,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-10 03:08:39,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000458632] [2022-02-10 03:08:39,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:39,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:39,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:39,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:39,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:39,756 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) [2022-02-10 03:08:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:40,181 INFO L93 Difference]: Finished difference Result 1307 states and 3702 transitions. [2022-02-10 03:08:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:08:40,181 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 [2022-02-10 03:08:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:40,183 INFO L225 Difference]: With dead ends: 1307 [2022-02-10 03:08:40,183 INFO L226 Difference]: Without dead ends: 1307 [2022-02-10 03:08:40,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:08:40,184 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:40,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 138 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:08:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-02-10 03:08:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1122. [2022-02-10 03:08:40,195 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) [2022-02-10 03:08:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3319 transitions. [2022-02-10 03:08:40,197 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3319 transitions. Word has length 17 [2022-02-10 03:08:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:40,197 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 3319 transitions. [2022-02-10 03:08:40,197 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) [2022-02-10 03:08:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3319 transitions. [2022-02-10 03:08:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:40,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:40,198 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:40,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-02-10 03:08:40,398 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 [2022-02-10 03:08:40,399 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:40,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1801815893, now seen corresponding path program 313 times [2022-02-10 03:08:40,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:40,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844486747] [2022-02-10 03:08:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:40,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:40,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:40,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844486747] [2022-02-10 03:08:40,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844486747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:40,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568075032] [2022-02-10 03:08:40,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:40,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:40,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:40,493 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) [2022-02-10 03:08:40,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-02-10 03:08:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:40,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:40,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:40,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:40,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:40,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:40,799 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:40,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:40,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:40,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568075032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:40,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:40,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:08:40,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207945233] [2022-02-10 03:08:40,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:40,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:40,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:40,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:40,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:40,818 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) [2022-02-10 03:08:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:41,043 INFO L93 Difference]: Finished difference Result 1235 states and 3529 transitions. [2022-02-10 03:08:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:08:41,044 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 [2022-02-10 03:08:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:41,045 INFO L225 Difference]: With dead ends: 1235 [2022-02-10 03:08:41,045 INFO L226 Difference]: Without dead ends: 1235 [2022-02-10 03:08:41,046 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 [2022-02-10 03:08:41,046 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:08:41,046 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] [2022-02-10 03:08:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-02-10 03:08:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1153. [2022-02-10 03:08:41,056 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) [2022-02-10 03:08:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3412 transitions. [2022-02-10 03:08:41,058 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3412 transitions. Word has length 17 [2022-02-10 03:08:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:41,058 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 3412 transitions. [2022-02-10 03:08:41,058 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) [2022-02-10 03:08:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3412 transitions. [2022-02-10 03:08:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:41,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:41,060 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:41,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-02-10 03:08:41,260 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 [2022-02-10 03:08:41,260 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1296755733, now seen corresponding path program 314 times [2022-02-10 03:08:41,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:41,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015071001] [2022-02-10 03:08:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:41,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:41,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:41,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015071001] [2022-02-10 03:08:41,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015071001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:41,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99957263] [2022-02-10 03:08:41,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:41,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:41,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:41,352 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) [2022-02-10 03:08:41,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-02-10 03:08:41,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:41,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:41,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:41,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:41,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:41,532 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 29 treesize of output 23 [2022-02-10 03:08:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:41,534 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 21 treesize of output 2 [2022-02-10 03:08:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:41,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:41,645 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:41,645 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:08:41,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:41,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99957263] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:41,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:41,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:08:41,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349689729] [2022-02-10 03:08:41,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:41,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:41,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:41,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:41,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:41,664 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) [2022-02-10 03:08:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:41,870 INFO L93 Difference]: Finished difference Result 1223 states and 3522 transitions. [2022-02-10 03:08:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:08:41,870 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 [2022-02-10 03:08:41,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:41,871 INFO L225 Difference]: With dead ends: 1223 [2022-02-10 03:08:41,871 INFO L226 Difference]: Without dead ends: 1223 [2022-02-10 03:08:41,872 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 [2022-02-10 03:08:41,872 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:41,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 106 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 448 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-02-10 03:08:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-02-10 03:08:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1155. [2022-02-10 03:08:41,882 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) [2022-02-10 03:08:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 3418 transitions. [2022-02-10 03:08:41,884 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 3418 transitions. Word has length 17 [2022-02-10 03:08:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:41,884 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 3418 transitions. [2022-02-10 03:08:41,884 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) [2022-02-10 03:08:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 3418 transitions. [2022-02-10 03:08:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:41,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:41,886 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:41,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:42,086 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 [2022-02-10 03:08:42,086 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:42,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1562268815, now seen corresponding path program 315 times [2022-02-10 03:08:42,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:42,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889843737] [2022-02-10 03:08:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:42,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:42,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:42,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889843737] [2022-02-10 03:08:42,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889843737] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:42,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615507802] [2022-02-10 03:08:42,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:42,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:42,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:42,178 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) [2022-02-10 03:08:42,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-02-10 03:08:42,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:08:42,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:42,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:42,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:42,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:42,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:42,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:42,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:42,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:42,496 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:42,496 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:08:42,498 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 [2022-02-10 03:08:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:42,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615507802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:42,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:42,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:08:42,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133008794] [2022-02-10 03:08:42,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:42,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:42,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:42,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:42,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:42,519 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) [2022-02-10 03:08:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:42,877 INFO L93 Difference]: Finished difference Result 1226 states and 3513 transitions. [2022-02-10 03:08:42,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:08:42,877 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 [2022-02-10 03:08:42,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:42,879 INFO L225 Difference]: With dead ends: 1226 [2022-02-10 03:08:42,879 INFO L226 Difference]: Without dead ends: 1218 [2022-02-10 03:08:42,879 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 [2022-02-10 03:08:42,879 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 [2022-02-10 03:08:42,879 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] [2022-02-10 03:08:42,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2022-02-10 03:08:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1160. [2022-02-10 03:08:42,889 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) [2022-02-10 03:08:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3423 transitions. [2022-02-10 03:08:42,899 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3423 transitions. Word has length 17 [2022-02-10 03:08:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:42,899 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 3423 transitions. [2022-02-10 03:08:42,899 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) [2022-02-10 03:08:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3423 transitions. [2022-02-10 03:08:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:42,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:42,900 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:42,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-02-10 03:08:43,100 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 [2022-02-10 03:08:43,101 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:43,101 INFO L85 PathProgramCache]: Analyzing trace with hash 640793779, now seen corresponding path program 316 times [2022-02-10 03:08:43,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:43,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415186443] [2022-02-10 03:08:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:43,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:43,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:43,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415186443] [2022-02-10 03:08:43,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415186443] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:43,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857502724] [2022-02-10 03:08:43,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:43,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:43,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:43,203 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) [2022-02-10 03:08:43,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-02-10 03:08:43,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:43,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:43,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:43,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:43,388 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 29 treesize of output 23 [2022-02-10 03:08:43,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:43,390 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 21 treesize of output 2 [2022-02-10 03:08:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:43,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:43,510 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:43,510 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 30 treesize of output 27 [2022-02-10 03:08:43,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:43,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857502724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:43,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:43,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:08:43,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561644425] [2022-02-10 03:08:43,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:43,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:43,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:43,530 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) [2022-02-10 03:08:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:44,338 INFO L93 Difference]: Finished difference Result 1303 states and 3665 transitions. [2022-02-10 03:08:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-10 03:08:44,339 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 [2022-02-10 03:08:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:44,340 INFO L225 Difference]: With dead ends: 1303 [2022-02-10 03:08:44,340 INFO L226 Difference]: Without dead ends: 1303 [2022-02-10 03:08:44,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=1707, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:08:44,341 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 [2022-02-10 03:08:44,342 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] [2022-02-10 03:08:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-02-10 03:08:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1161. [2022-02-10 03:08:44,353 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) [2022-02-10 03:08:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 3438 transitions. [2022-02-10 03:08:44,355 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 3438 transitions. Word has length 17 [2022-02-10 03:08:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:44,355 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 3438 transitions. [2022-02-10 03:08:44,355 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) [2022-02-10 03:08:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 3438 transitions. [2022-02-10 03:08:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:44,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:44,356 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:44,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-02-10 03:08:44,557 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 [2022-02-10 03:08:44,557 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2100124393, now seen corresponding path program 317 times [2022-02-10 03:08:44,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:44,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765227813] [2022-02-10 03:08:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:44,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:44,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:44,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765227813] [2022-02-10 03:08:44,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765227813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:44,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146321098] [2022-02-10 03:08:44,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:44,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:44,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:44,652 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) [2022-02-10 03:08:44,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-02-10 03:08:44,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:08:44,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:44,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:44,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:44,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:44,852 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 37 treesize of output 31 [2022-02-10 03:08:44,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:44,854 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 31 treesize of output 25 [2022-02-10 03:08:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:44,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:44,980 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:44,981 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 42 treesize of output 35 [2022-02-10 03:08:44,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:45,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146321098] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:45,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:45,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:08:45,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830349969] [2022-02-10 03:08:45,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:45,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:45,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:45,004 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) [2022-02-10 03:08:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:45,493 INFO L93 Difference]: Finished difference Result 1235 states and 3538 transitions. [2022-02-10 03:08:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:08:45,493 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 [2022-02-10 03:08:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:45,494 INFO L225 Difference]: With dead ends: 1235 [2022-02-10 03:08:45,495 INFO L226 Difference]: Without dead ends: 1229 [2022-02-10 03:08:45,495 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 [2022-02-10 03:08:45,495 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 [2022-02-10 03:08:45,495 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] [2022-02-10 03:08:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-02-10 03:08:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1164. [2022-02-10 03:08:45,505 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) [2022-02-10 03:08:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3441 transitions. [2022-02-10 03:08:45,507 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3441 transitions. Word has length 17 [2022-02-10 03:08:45,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:45,507 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 3441 transitions. [2022-02-10 03:08:45,507 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) [2022-02-10 03:08:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3441 transitions. [2022-02-10 03:08:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:45,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:45,508 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:45,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-02-10 03:08:45,708 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 [2022-02-10 03:08:45,709 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:45,709 INFO L85 PathProgramCache]: Analyzing trace with hash 880436117, now seen corresponding path program 318 times [2022-02-10 03:08:45,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:45,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38299220] [2022-02-10 03:08:45,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:45,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:45,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:45,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38299220] [2022-02-10 03:08:45,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38299220] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:45,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798693238] [2022-02-10 03:08:45,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:45,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:45,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:45,808 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) [2022-02-10 03:08:45,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-02-10 03:08:45,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:08:45,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:45,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:45,999 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 29 treesize of output 23 [2022-02-10 03:08:46,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:46,002 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 21 treesize of output 2 [2022-02-10 03:08:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:46,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:46,138 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:46,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:46,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:46,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798693238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:46,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:46,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:46,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150337151] [2022-02-10 03:08:46,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:46,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:46,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:46,157 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) [2022-02-10 03:08:47,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:47,108 INFO L93 Difference]: Finished difference Result 1331 states and 3722 transitions. [2022-02-10 03:08:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:08:47,108 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 [2022-02-10 03:08:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:47,110 INFO L225 Difference]: With dead ends: 1331 [2022-02-10 03:08:47,110 INFO L226 Difference]: Without dead ends: 1331 [2022-02-10 03:08:47,110 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 [2022-02-10 03:08:47,110 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:08:47,110 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] [2022-02-10 03:08:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-02-10 03:08:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1157. [2022-02-10 03:08:47,121 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) [2022-02-10 03:08:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3422 transitions. [2022-02-10 03:08:47,123 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3422 transitions. Word has length 17 [2022-02-10 03:08:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:47,123 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 3422 transitions. [2022-02-10 03:08:47,123 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) [2022-02-10 03:08:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3422 transitions. [2022-02-10 03:08:47,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:47,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:47,124 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:47,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-02-10 03:08:47,324 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 [2022-02-10 03:08:47,325 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:47,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:47,325 INFO L85 PathProgramCache]: Analyzing trace with hash -39264591, now seen corresponding path program 319 times [2022-02-10 03:08:47,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:47,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888518681] [2022-02-10 03:08:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:47,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:47,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:47,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888518681] [2022-02-10 03:08:47,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888518681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:47,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096269130] [2022-02-10 03:08:47,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:47,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:47,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:47,424 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) [2022-02-10 03:08:47,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-02-10 03:08:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:47,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:47,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:47,626 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 37 treesize of output 31 [2022-02-10 03:08:47,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:47,628 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 31 treesize of output 25 [2022-02-10 03:08:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:47,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:47,774 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:47,774 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:08:47,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:47,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096269130] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:47,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:47,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:47,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688028726] [2022-02-10 03:08:47,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:47,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:47,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:47,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:47,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:47,798 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) [2022-02-10 03:08:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:48,098 INFO L93 Difference]: Finished difference Result 1188 states and 3476 transitions. [2022-02-10 03:08:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:08:48,098 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 [2022-02-10 03:08:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:48,100 INFO L225 Difference]: With dead ends: 1188 [2022-02-10 03:08:48,100 INFO L226 Difference]: Without dead ends: 1183 [2022-02-10 03:08:48,100 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 [2022-02-10 03:08:48,100 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 [2022-02-10 03:08:48,100 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] [2022-02-10 03:08:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-02-10 03:08:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1158. [2022-02-10 03:08:48,111 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) [2022-02-10 03:08:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3421 transitions. [2022-02-10 03:08:48,113 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3421 transitions. Word has length 17 [2022-02-10 03:08:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:48,113 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 3421 transitions. [2022-02-10 03:08:48,113 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) [2022-02-10 03:08:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3421 transitions. [2022-02-10 03:08:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:48,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:48,114 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:48,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-02-10 03:08:48,315 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 [2022-02-10 03:08:48,315 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:48,315 INFO L85 PathProgramCache]: Analyzing trace with hash 888166515, now seen corresponding path program 320 times [2022-02-10 03:08:48,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:48,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934772254] [2022-02-10 03:08:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:48,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:48,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:48,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934772254] [2022-02-10 03:08:48,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934772254] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:48,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862583787] [2022-02-10 03:08:48,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:48,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:48,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:48,407 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) [2022-02-10 03:08:48,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-02-10 03:08:48,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:48,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:48,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:48,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:48,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:48,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:48,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:48,728 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:48,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:48,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:48,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862583787] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:48,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:48,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:48,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153491577] [2022-02-10 03:08:48,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:48,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:48,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:48,747 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) [2022-02-10 03:08:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:49,784 INFO L93 Difference]: Finished difference Result 1377 states and 3765 transitions. [2022-02-10 03:08:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:08:49,784 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 [2022-02-10 03:08:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:49,786 INFO L225 Difference]: With dead ends: 1377 [2022-02-10 03:08:49,786 INFO L226 Difference]: Without dead ends: 1377 [2022-02-10 03:08:49,787 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 [2022-02-10 03:08:49,787 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 174 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-10 03:08:49,787 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] [2022-02-10 03:08:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-02-10 03:08:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1143. [2022-02-10 03:08:49,799 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) [2022-02-10 03:08:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 3372 transitions. [2022-02-10 03:08:49,801 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 3372 transitions. Word has length 17 [2022-02-10 03:08:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:49,801 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 3372 transitions. [2022-02-10 03:08:49,801 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) [2022-02-10 03:08:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 3372 transitions. [2022-02-10 03:08:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:49,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:49,802 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:49,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-02-10 03:08:50,002 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 [2022-02-10 03:08:50,003 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:50,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1689782743, now seen corresponding path program 321 times [2022-02-10 03:08:50,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:50,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000029998] [2022-02-10 03:08:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:50,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:50,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:50,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000029998] [2022-02-10 03:08:50,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000029998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:50,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587491427] [2022-02-10 03:08:50,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:50,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:50,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:50,104 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) [2022-02-10 03:08:50,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-02-10 03:08:50,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:08:50,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:50,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:50,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:50,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:50,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:50,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:50,261 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:08:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:50,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:50,445 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:50,445 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 42 treesize of output 35 [2022-02-10 03:08:50,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:50,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587491427] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:50,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:50,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:08:50,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279914625] [2022-02-10 03:08:50,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:50,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:50,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:50,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:50,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:50,474 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) [2022-02-10 03:08:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:50,995 INFO L93 Difference]: Finished difference Result 1239 states and 3531 transitions. [2022-02-10 03:08:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:08:50,996 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 [2022-02-10 03:08:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:50,998 INFO L225 Difference]: With dead ends: 1239 [2022-02-10 03:08:50,998 INFO L226 Difference]: Without dead ends: 1236 [2022-02-10 03:08:50,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:08:50,998 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:50,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 114 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:08:50,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-02-10 03:08:51,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1155. [2022-02-10 03:08:51,009 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) [2022-02-10 03:08:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 3413 transitions. [2022-02-10 03:08:51,011 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 3413 transitions. Word has length 17 [2022-02-10 03:08:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:51,011 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 3413 transitions. [2022-02-10 03:08:51,011 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) [2022-02-10 03:08:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 3413 transitions. [2022-02-10 03:08:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:51,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:51,012 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:51,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-02-10 03:08:51,213 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 [2022-02-10 03:08:51,213 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:51,213 INFO L85 PathProgramCache]: Analyzing trace with hash -886840847, now seen corresponding path program 322 times [2022-02-10 03:08:51,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:51,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979243270] [2022-02-10 03:08:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:51,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:51,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:51,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979243270] [2022-02-10 03:08:51,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979243270] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:51,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528468696] [2022-02-10 03:08:51,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:51,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:51,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:51,316 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) [2022-02-10 03:08:51,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-02-10 03:08:51,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:51,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:51,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:51,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:51,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:51,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:51,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:51,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:51,636 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:51,636 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:08:51,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:51,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528468696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:51,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:51,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:08:51,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101026024] [2022-02-10 03:08:51,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:51,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:51,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:51,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:51,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:51,659 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) [2022-02-10 03:08:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:52,005 INFO L93 Difference]: Finished difference Result 1236 states and 3524 transitions. [2022-02-10 03:08:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:08:52,006 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 [2022-02-10 03:08:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:52,007 INFO L225 Difference]: With dead ends: 1236 [2022-02-10 03:08:52,008 INFO L226 Difference]: Without dead ends: 1236 [2022-02-10 03:08:52,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:08:52,008 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 [2022-02-10 03:08:52,008 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] [2022-02-10 03:08:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-02-10 03:08:52,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1149. [2022-02-10 03:08:52,019 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) [2022-02-10 03:08:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3391 transitions. [2022-02-10 03:08:52,020 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3391 transitions. Word has length 17 [2022-02-10 03:08:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:52,021 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 3391 transitions. [2022-02-10 03:08:52,021 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) [2022-02-10 03:08:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3391 transitions. [2022-02-10 03:08:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:52,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:52,022 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:52,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-02-10 03:08:52,222 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 [2022-02-10 03:08:52,222 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash -10398669, now seen corresponding path program 323 times [2022-02-10 03:08:52,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:52,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202817546] [2022-02-10 03:08:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:52,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:52,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:52,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202817546] [2022-02-10 03:08:52,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202817546] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:52,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614445855] [2022-02-10 03:08:52,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:52,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:52,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:52,303 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) [2022-02-10 03:08:52,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-02-10 03:08:52,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:08:52,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:52,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:52,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:52,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:52,471 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 29 treesize of output 23 [2022-02-10 03:08:52,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:52,473 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 21 treesize of output 2 [2022-02-10 03:08:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:52,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:52,570 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:52,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:52,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:52,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614445855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:52,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:52,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:08:52,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601919621] [2022-02-10 03:08:52,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:52,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:52,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:52,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:52,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:52,592 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) [2022-02-10 03:08:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:52,852 INFO L93 Difference]: Finished difference Result 1291 states and 3693 transitions. [2022-02-10 03:08:52,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:08:52,852 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 [2022-02-10 03:08:52,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:52,854 INFO L225 Difference]: With dead ends: 1291 [2022-02-10 03:08:52,854 INFO L226 Difference]: Without dead ends: 1291 [2022-02-10 03:08:52,854 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 [2022-02-10 03:08:52,854 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 [2022-02-10 03:08:52,854 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] [2022-02-10 03:08:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-02-10 03:08:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1170. [2022-02-10 03:08:52,870 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) [2022-02-10 03:08:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3456 transitions. [2022-02-10 03:08:52,872 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3456 transitions. Word has length 17 [2022-02-10 03:08:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:52,872 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 3456 transitions. [2022-02-10 03:08:52,872 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) [2022-02-10 03:08:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3456 transitions. [2022-02-10 03:08:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:52,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:52,873 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:52,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-02-10 03:08:53,074 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 [2022-02-10 03:08:53,074 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:53,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1543650455, now seen corresponding path program 324 times [2022-02-10 03:08:53,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:53,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270288418] [2022-02-10 03:08:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:53,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:53,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:53,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270288418] [2022-02-10 03:08:53,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270288418] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:53,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604869965] [2022-02-10 03:08:53,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:53,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:53,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:53,154 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) [2022-02-10 03:08:53,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-02-10 03:08:53,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:08:53,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:53,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:53,336 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 37 treesize of output 31 [2022-02-10 03:08:53,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:53,338 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 31 treesize of output 25 [2022-02-10 03:08:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:53,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:53,439 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:53,440 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 42 treesize of output 35 [2022-02-10 03:08:53,441 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 [2022-02-10 03:08:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:53,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604869965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:53,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:53,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:08:53,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210698933] [2022-02-10 03:08:53,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:53,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:53,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:53,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:53,465 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) [2022-02-10 03:08:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:53,798 INFO L93 Difference]: Finished difference Result 1219 states and 3527 transitions. [2022-02-10 03:08:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:08:53,799 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 [2022-02-10 03:08:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:53,800 INFO L225 Difference]: With dead ends: 1219 [2022-02-10 03:08:53,800 INFO L226 Difference]: Without dead ends: 1213 [2022-02-10 03:08:53,800 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 [2022-02-10 03:08:53,800 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 [2022-02-10 03:08:53,800 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] [2022-02-10 03:08:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-02-10 03:08:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1170. [2022-02-10 03:08:53,811 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) [2022-02-10 03:08:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3453 transitions. [2022-02-10 03:08:53,813 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3453 transitions. Word has length 17 [2022-02-10 03:08:53,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:53,813 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 3453 transitions. [2022-02-10 03:08:53,813 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) [2022-02-10 03:08:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3453 transitions. [2022-02-10 03:08:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:53,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:53,814 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:53,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-02-10 03:08:54,014 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 [2022-02-10 03:08:54,015 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash 229243669, now seen corresponding path program 325 times [2022-02-10 03:08:54,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:54,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827885749] [2022-02-10 03:08:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:54,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:54,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:54,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827885749] [2022-02-10 03:08:54,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827885749] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:54,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204310126] [2022-02-10 03:08:54,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:54,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:54,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:54,100 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) [2022-02-10 03:08:54,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-02-10 03:08:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:54,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:54,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:54,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:54,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:54,280 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-02-10 03:08:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:54,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:54,391 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:54,391 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:08:54,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:54,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204310126] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:54,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:54,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:08:54,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180615124] [2022-02-10 03:08:54,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:54,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:54,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:54,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:54,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:54,412 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) [2022-02-10 03:08:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:55,025 INFO L93 Difference]: Finished difference Result 1331 states and 3773 transitions. [2022-02-10 03:08:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:08:55,025 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 [2022-02-10 03:08:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:55,027 INFO L225 Difference]: With dead ends: 1331 [2022-02-10 03:08:55,027 INFO L226 Difference]: Without dead ends: 1329 [2022-02-10 03:08:55,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:08:55,027 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 [2022-02-10 03:08:55,027 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] [2022-02-10 03:08:55,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2022-02-10 03:08:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1176. [2022-02-10 03:08:55,038 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) [2022-02-10 03:08:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3470 transitions. [2022-02-10 03:08:55,040 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3470 transitions. Word has length 17 [2022-02-10 03:08:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:55,040 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 3470 transitions. [2022-02-10 03:08:55,040 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) [2022-02-10 03:08:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3470 transitions. [2022-02-10 03:08:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:55,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:55,041 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:55,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-02-10 03:08:55,242 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 [2022-02-10 03:08:55,242 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:55,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:55,242 INFO L85 PathProgramCache]: Analyzing trace with hash -690457039, now seen corresponding path program 326 times [2022-02-10 03:08:55,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:55,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685097736] [2022-02-10 03:08:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:55,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:55,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:55,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685097736] [2022-02-10 03:08:55,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685097736] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:55,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471165240] [2022-02-10 03:08:55,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:55,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:55,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:55,325 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) [2022-02-10 03:08:55,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-02-10 03:08:55,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:55,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:55,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:55,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:55,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:55,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:55,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:55,513 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-10 03:08:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:55,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:55,635 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:55,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:55,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:55,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471165240] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:55,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:55,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:08:55,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528369056] [2022-02-10 03:08:55,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:55,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:55,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:55,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:55,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:55,661 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) [2022-02-10 03:08:56,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:56,108 INFO L93 Difference]: Finished difference Result 1218 states and 3538 transitions. [2022-02-10 03:08:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:08:56,109 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 [2022-02-10 03:08:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:56,110 INFO L225 Difference]: With dead ends: 1218 [2022-02-10 03:08:56,110 INFO L226 Difference]: Without dead ends: 1214 [2022-02-10 03:08:56,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:08:56,111 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:08:56,111 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] [2022-02-10 03:08:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-02-10 03:08:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1178. [2022-02-10 03:08:56,121 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) [2022-02-10 03:08:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3472 transitions. [2022-02-10 03:08:56,123 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3472 transitions. Word has length 17 [2022-02-10 03:08:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:56,123 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 3472 transitions. [2022-02-10 03:08:56,123 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) [2022-02-10 03:08:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3472 transitions. [2022-02-10 03:08:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:56,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:56,124 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:56,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-02-10 03:08:56,324 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 [2022-02-10 03:08:56,325 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash 236974067, now seen corresponding path program 327 times [2022-02-10 03:08:56,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:56,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910256754] [2022-02-10 03:08:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:56,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:56,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:56,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910256754] [2022-02-10 03:08:56,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910256754] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:56,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546673039] [2022-02-10 03:08:56,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:56,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:56,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:56,411 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) [2022-02-10 03:08:56,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-02-10 03:08:56,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:08:56,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:56,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:08:56,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:56,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:56,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:56,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:56,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:56,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:56,710 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:56,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:56,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:56,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546673039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:56,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:56,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:08:56,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859026071] [2022-02-10 03:08:56,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:56,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:56,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:56,731 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) [2022-02-10 03:08:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:57,498 INFO L93 Difference]: Finished difference Result 1376 states and 3863 transitions. [2022-02-10 03:08:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:08:57,498 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 [2022-02-10 03:08:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:57,500 INFO L225 Difference]: With dead ends: 1376 [2022-02-10 03:08:57,500 INFO L226 Difference]: Without dead ends: 1371 [2022-02-10 03:08:57,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 03:08:57,500 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 [2022-02-10 03:08:57,500 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] [2022-02-10 03:08:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-02-10 03:08:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1167. [2022-02-10 03:08:57,511 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) [2022-02-10 03:08:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3434 transitions. [2022-02-10 03:08:57,513 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3434 transitions. Word has length 17 [2022-02-10 03:08:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:57,513 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 3434 transitions. [2022-02-10 03:08:57,513 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) [2022-02-10 03:08:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3434 transitions. [2022-02-10 03:08:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:57,515 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:57,515 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:57,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:57,715 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 [2022-02-10 03:08:57,715 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1038590295, now seen corresponding path program 328 times [2022-02-10 03:08:57,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:57,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562549392] [2022-02-10 03:08:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:57,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:57,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:57,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562549392] [2022-02-10 03:08:57,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562549392] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:57,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593612864] [2022-02-10 03:08:57,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:57,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:57,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:57,801 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) [2022-02-10 03:08:57,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-02-10 03:08:57,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:57,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:57,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:57,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:57,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:57,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:57,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:57,947 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:08:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:58,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:58,100 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:58,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:08:58,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:58,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593612864] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:58,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:58,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:08:58,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132958762] [2022-02-10 03:08:58,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:58,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:58,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:58,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:58,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:58,126 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) [2022-02-10 03:08:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:58,599 INFO L93 Difference]: Finished difference Result 1214 states and 3528 transitions. [2022-02-10 03:08:58,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:08:58,599 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 [2022-02-10 03:08:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:58,601 INFO L225 Difference]: With dead ends: 1214 [2022-02-10 03:08:58,601 INFO L226 Difference]: Without dead ends: 1210 [2022-02-10 03:08:58,601 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 [2022-02-10 03:08:58,601 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 [2022-02-10 03:08:58,602 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] [2022-02-10 03:08:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-02-10 03:08:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1168. [2022-02-10 03:08:58,612 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) [2022-02-10 03:08:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3436 transitions. [2022-02-10 03:08:58,614 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3436 transitions. Word has length 17 [2022-02-10 03:08:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:58,614 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 3436 transitions. [2022-02-10 03:08:58,614 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) [2022-02-10 03:08:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3436 transitions. [2022-02-10 03:08:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:58,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:58,615 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:58,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:58,816 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 [2022-02-10 03:08:58,816 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1538033295, now seen corresponding path program 329 times [2022-02-10 03:08:58,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:58,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526578228] [2022-02-10 03:08:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:58,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:58,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:58,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526578228] [2022-02-10 03:08:58,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526578228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:58,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324963811] [2022-02-10 03:08:58,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:58,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:58,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:58,912 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) [2022-02-10 03:08:58,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-02-10 03:08:58,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:08:58,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:58,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:58,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:59,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:59,054 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 43 treesize of output 35 [2022-02-10 03:08:59,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:59,056 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 35 treesize of output 27 [2022-02-10 03:08:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:59,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:59,200 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:08:59,200 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:08:59,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:08:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:59,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324963811] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:59,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:59,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:08:59,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13196855] [2022-02-10 03:08:59,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:59,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:59,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:59,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:59,226 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) [2022-02-10 03:08:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:59,550 INFO L93 Difference]: Finished difference Result 1208 states and 3517 transitions. [2022-02-10 03:08:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:08:59,550 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 [2022-02-10 03:08:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:59,552 INFO L225 Difference]: With dead ends: 1208 [2022-02-10 03:08:59,552 INFO L226 Difference]: Without dead ends: 1208 [2022-02-10 03:08:59,552 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 [2022-02-10 03:08:59,552 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:59,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-02-10 03:08:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1163. [2022-02-10 03:08:59,563 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) [2022-02-10 03:08:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3418 transitions. [2022-02-10 03:08:59,565 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3418 transitions. Word has length 17 [2022-02-10 03:08:59,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:59,565 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 3418 transitions. [2022-02-10 03:08:59,565 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) [2022-02-10 03:08:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3418 transitions. [2022-02-10 03:08:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:08:59,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:59,566 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:59,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-02-10 03:08:59,766 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 [2022-02-10 03:08:59,766 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:08:59,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash 208237461, now seen corresponding path program 330 times [2022-02-10 03:08:59,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:59,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900123605] [2022-02-10 03:08:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:59,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:08:59,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:59,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900123605] [2022-02-10 03:08:59,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900123605] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:59,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297409102] [2022-02-10 03:08:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:59,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:59,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:59,848 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) [2022-02-10 03:08:59,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-02-10 03:08:59,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:08:59,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:08:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:00,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:00,006 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:09:00,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:00,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:00,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:00,099 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:00,099 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:09:00,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:00,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297409102] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:00,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:00,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:09:00,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800035383] [2022-02-10 03:09:00,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:00,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:00,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:00,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:00,123 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) [2022-02-10 03:09:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:00,427 INFO L93 Difference]: Finished difference Result 1287 states and 3668 transitions. [2022-02-10 03:09:00,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:09:00,427 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 [2022-02-10 03:09:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:00,429 INFO L225 Difference]: With dead ends: 1287 [2022-02-10 03:09:00,429 INFO L226 Difference]: Without dead ends: 1287 [2022-02-10 03:09:00,429 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 [2022-02-10 03:09:00,429 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:09:00,429 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] [2022-02-10 03:09:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-02-10 03:09:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1171. [2022-02-10 03:09:00,440 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) [2022-02-10 03:09:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3445 transitions. [2022-02-10 03:09:00,442 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3445 transitions. Word has length 17 [2022-02-10 03:09:00,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:00,442 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 3445 transitions. [2022-02-10 03:09:00,442 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) [2022-02-10 03:09:00,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3445 transitions. [2022-02-10 03:09:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:00,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:00,443 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:00,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-02-10 03:09:00,643 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 [2022-02-10 03:09:00,644 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash -711463247, now seen corresponding path program 331 times [2022-02-10 03:09:00,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:00,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919585114] [2022-02-10 03:09:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:00,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:00,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:00,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919585114] [2022-02-10 03:09:00,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919585114] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:00,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181514424] [2022-02-10 03:09:00,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:00,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:00,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:00,724 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) [2022-02-10 03:09:00,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-02-10 03:09:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:00,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:00,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:00,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:00,903 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:09:00,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:00,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:00,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:01,034 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:01,034 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 42 treesize of output 33 [2022-02-10 03:09:01,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:01,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181514424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:01,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:01,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:09:01,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447137753] [2022-02-10 03:09:01,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:01,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:01,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:01,066 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) [2022-02-10 03:09:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:01,452 INFO L93 Difference]: Finished difference Result 1221 states and 3520 transitions. [2022-02-10 03:09:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:09:01,452 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 [2022-02-10 03:09:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:01,454 INFO L225 Difference]: With dead ends: 1221 [2022-02-10 03:09:01,454 INFO L226 Difference]: Without dead ends: 1217 [2022-02-10 03:09:01,454 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 [2022-02-10 03:09:01,454 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 [2022-02-10 03:09:01,454 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] [2022-02-10 03:09:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-02-10 03:09:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1171. [2022-02-10 03:09:01,465 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) [2022-02-10 03:09:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3434 transitions. [2022-02-10 03:09:01,467 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3434 transitions. Word has length 17 [2022-02-10 03:09:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:01,467 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 3434 transitions. [2022-02-10 03:09:01,467 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) [2022-02-10 03:09:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3434 transitions. [2022-02-10 03:09:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:01,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:01,468 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:01,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-02-10 03:09:01,668 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 [2022-02-10 03:09:01,668 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash 215967859, now seen corresponding path program 332 times [2022-02-10 03:09:01,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:01,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155018312] [2022-02-10 03:09:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:01,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:01,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:01,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155018312] [2022-02-10 03:09:01,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155018312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:01,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301211312] [2022-02-10 03:09:01,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:01,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:01,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:01,753 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) [2022-02-10 03:09:01,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-02-10 03:09:01,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:01,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:01,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:01,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:01,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:01,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:01,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:01,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:01,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:02,005 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:02,005 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:09:02,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:02,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301211312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:02,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:02,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:09:02,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375469470] [2022-02-10 03:09:02,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:02,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:02,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:02,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:02,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:02,029 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) [2022-02-10 03:09:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:02,442 INFO L93 Difference]: Finished difference Result 1309 states and 3660 transitions. [2022-02-10 03:09:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:09:02,442 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 [2022-02-10 03:09:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:02,444 INFO L225 Difference]: With dead ends: 1309 [2022-02-10 03:09:02,444 INFO L226 Difference]: Without dead ends: 1307 [2022-02-10 03:09:02,444 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 [2022-02-10 03:09:02,444 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 [2022-02-10 03:09:02,444 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] [2022-02-10 03:09:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-02-10 03:09:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1169. [2022-02-10 03:09:02,455 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) [2022-02-10 03:09:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3413 transitions. [2022-02-10 03:09:02,457 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3413 transitions. Word has length 17 [2022-02-10 03:09:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:02,457 INFO L470 AbstractCegarLoop]: Abstraction has 1169 states and 3413 transitions. [2022-02-10 03:09:02,457 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) [2022-02-10 03:09:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3413 transitions. [2022-02-10 03:09:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:02,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:02,458 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:02,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-02-10 03:09:02,659 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 [2022-02-10 03:09:02,659 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1017584087, now seen corresponding path program 333 times [2022-02-10 03:09:02,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:02,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420369353] [2022-02-10 03:09:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:02,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:02,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:02,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420369353] [2022-02-10 03:09:02,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420369353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:02,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562010384] [2022-02-10 03:09:02,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:02,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:02,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:02,748 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) [2022-02-10 03:09:02,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-02-10 03:09:02,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:09:02,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:02,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:09:02,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:02,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:02,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:02,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:02,876 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 35 treesize of output 27 [2022-02-10 03:09:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:02,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:03,003 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:03,004 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:09:03,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:03,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562010384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:03,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:03,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:09:03,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445994453] [2022-02-10 03:09:03,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:03,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:03,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:03,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:03,032 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) [2022-02-10 03:09:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:03,638 INFO L93 Difference]: Finished difference Result 1270 states and 3581 transitions. [2022-02-10 03:09:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 03:09:03,639 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 [2022-02-10 03:09:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:03,641 INFO L225 Difference]: With dead ends: 1270 [2022-02-10 03:09:03,641 INFO L226 Difference]: Without dead ends: 1267 [2022-02-10 03:09:03,641 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 [2022-02-10 03:09:03,641 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 [2022-02-10 03:09:03,641 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] [2022-02-10 03:09:03,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-02-10 03:09:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1178. [2022-02-10 03:09:03,652 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) [2022-02-10 03:09:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3428 transitions. [2022-02-10 03:09:03,654 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3428 transitions. Word has length 17 [2022-02-10 03:09:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:03,654 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 3428 transitions. [2022-02-10 03:09:03,654 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) [2022-02-10 03:09:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3428 transitions. [2022-02-10 03:09:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:03,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:03,655 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:03,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-02-10 03:09:03,863 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 [2022-02-10 03:09:03,863 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1559039503, now seen corresponding path program 334 times [2022-02-10 03:09:03,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:03,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976959110] [2022-02-10 03:09:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:03,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:03,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:03,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976959110] [2022-02-10 03:09:03,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976959110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:03,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97087603] [2022-02-10 03:09:03,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:03,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:03,955 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) [2022-02-10 03:09:03,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-02-10 03:09:03,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:03,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:04,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:04,079 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 [2022-02-10 03:09:04,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:04,081 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 35 treesize of output 27 [2022-02-10 03:09:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:04,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:04,205 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:04,206 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 42 treesize of output 33 [2022-02-10 03:09:04,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:04,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97087603] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:04,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:04,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:09:04,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302134079] [2022-02-10 03:09:04,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:04,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:04,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:04,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:04,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:04,235 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) [2022-02-10 03:09:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:04,626 INFO L93 Difference]: Finished difference Result 1257 states and 3543 transitions. [2022-02-10 03:09:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:09:04,626 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 [2022-02-10 03:09:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:04,628 INFO L225 Difference]: With dead ends: 1257 [2022-02-10 03:09:04,628 INFO L226 Difference]: Without dead ends: 1257 [2022-02-10 03:09:04,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:09:04,628 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:04,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 68 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-02-10 03:09:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1150. [2022-02-10 03:09:04,639 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) [2022-02-10 03:09:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3322 transitions. [2022-02-10 03:09:04,641 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3322 transitions. Word has length 17 [2022-02-10 03:09:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:04,641 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 3322 transitions. [2022-02-10 03:09:04,641 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) [2022-02-10 03:09:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3322 transitions. [2022-02-10 03:09:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:04,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:04,642 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:04,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:04,842 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 [2022-02-10 03:09:04,843 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:04,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:04,843 INFO L85 PathProgramCache]: Analyzing trace with hash 334084049, now seen corresponding path program 335 times [2022-02-10 03:09:04,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:04,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300956338] [2022-02-10 03:09:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:04,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:04,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:04,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300956338] [2022-02-10 03:09:04,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300956338] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:04,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220782867] [2022-02-10 03:09:04,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:04,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:04,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:04,926 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) [2022-02-10 03:09:04,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-02-10 03:09:04,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:09:04,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:04,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:04,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:05,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:05,048 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 43 treesize of output 35 [2022-02-10 03:09:05,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:05,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:05,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:05,173 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:05,174 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:09:05,175 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 21 treesize of output 13 [2022-02-10 03:09:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:05,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220782867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:05,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:05,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:09:05,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601489010] [2022-02-10 03:09:05,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:05,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:05,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:05,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:05,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:05,203 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) [2022-02-10 03:09:05,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:05,727 INFO L93 Difference]: Finished difference Result 1247 states and 3474 transitions. [2022-02-10 03:09:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:09:05,727 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 [2022-02-10 03:09:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:05,729 INFO L225 Difference]: With dead ends: 1247 [2022-02-10 03:09:05,729 INFO L226 Difference]: Without dead ends: 1245 [2022-02-10 03:09:05,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:09:05,729 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:09:05,729 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] [2022-02-10 03:09:05,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-02-10 03:09:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1151. [2022-02-10 03:09:05,740 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) [2022-02-10 03:09:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 3314 transitions. [2022-02-10 03:09:05,742 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 3314 transitions. Word has length 17 [2022-02-10 03:09:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:05,742 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 3314 transitions. [2022-02-10 03:09:05,742 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) [2022-02-10 03:09:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 3314 transitions. [2022-02-10 03:09:05,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:05,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:05,743 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:05,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-02-10 03:09:05,943 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 [2022-02-10 03:09:05,943 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash 2063131383, now seen corresponding path program 336 times [2022-02-10 03:09:05,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:05,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709112330] [2022-02-10 03:09:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:05,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:06,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:06,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709112330] [2022-02-10 03:09:06,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709112330] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:06,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533019534] [2022-02-10 03:09:06,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:06,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:06,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:06,024 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) [2022-02-10 03:09:06,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-02-10 03:09:06,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:09:06,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:06,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:06,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:06,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:06,179 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 39 treesize of output 33 [2022-02-10 03:09:06,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:06,180 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-10 03:09:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:06,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:06,269 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:06,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:06,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:06,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533019534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:06,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:06,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-10 03:09:06,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259084057] [2022-02-10 03:09:06,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:06,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:06,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:06,299 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) [2022-02-10 03:09:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:06,731 INFO L93 Difference]: Finished difference Result 1203 states and 3394 transitions. [2022-02-10 03:09:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:09:06,731 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 [2022-02-10 03:09:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:06,733 INFO L225 Difference]: With dead ends: 1203 [2022-02-10 03:09:06,733 INFO L226 Difference]: Without dead ends: 1199 [2022-02-10 03:09:06,733 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 [2022-02-10 03:09:06,734 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 [2022-02-10 03:09:06,734 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] [2022-02-10 03:09:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-02-10 03:09:06,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1151. [2022-02-10 03:09:06,750 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) [2022-02-10 03:09:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 3303 transitions. [2022-02-10 03:09:06,751 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 3303 transitions. Word has length 17 [2022-02-10 03:09:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:06,751 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 3303 transitions. [2022-02-10 03:09:06,752 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) [2022-02-10 03:09:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 3303 transitions. [2022-02-10 03:09:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:06,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:06,753 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:06,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-02-10 03:09:06,953 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 [2022-02-10 03:09:06,953 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:06,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:06,954 INFO L85 PathProgramCache]: Analyzing trace with hash -200351757, now seen corresponding path program 337 times [2022-02-10 03:09:06,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:06,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456008545] [2022-02-10 03:09:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:06,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:07,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:07,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456008545] [2022-02-10 03:09:07,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456008545] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:07,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655495082] [2022-02-10 03:09:07,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:07,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:07,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:07,048 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) [2022-02-10 03:09:07,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-02-10 03:09:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:07,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:07,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:07,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:07,193 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 43 treesize of output 35 [2022-02-10 03:09:07,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:07,194 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 35 treesize of output 27 [2022-02-10 03:09:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:07,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:07,339 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:07,339 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 [2022-02-10 03:09:07,341 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 [2022-02-10 03:09:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:07,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655495082] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:07,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:07,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:09:07,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331245880] [2022-02-10 03:09:07,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:07,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:07,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:07,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:07,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:07,367 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) [2022-02-10 03:09:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:07,891 INFO L93 Difference]: Finished difference Result 1346 states and 3680 transitions. [2022-02-10 03:09:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:09:07,891 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 [2022-02-10 03:09:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:07,893 INFO L225 Difference]: With dead ends: 1346 [2022-02-10 03:09:07,893 INFO L226 Difference]: Without dead ends: 1345 [2022-02-10 03:09:07,893 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 [2022-02-10 03:09:07,893 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:07,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 138 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:09:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-02-10 03:09:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1183. [2022-02-10 03:09:07,905 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) [2022-02-10 03:09:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3415 transitions. [2022-02-10 03:09:07,907 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3415 transitions. Word has length 17 [2022-02-10 03:09:07,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:07,907 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 3415 transitions. [2022-02-10 03:09:07,907 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) [2022-02-10 03:09:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3415 transitions. [2022-02-10 03:09:07,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:07,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:07,908 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:07,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-02-10 03:09:08,109 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 [2022-02-10 03:09:08,109 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash 601264471, now seen corresponding path program 338 times [2022-02-10 03:09:08,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:08,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615115221] [2022-02-10 03:09:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:08,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:08,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:08,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615115221] [2022-02-10 03:09:08,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615115221] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:08,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571464143] [2022-02-10 03:09:08,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:08,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:08,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:08,200 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) [2022-02-10 03:09:08,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-02-10 03:09:08,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:08,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:08,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:08,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:08,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:08,342 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 43 treesize of output 35 [2022-02-10 03:09:08,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:08,344 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 [2022-02-10 03:09:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:08,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:08,499 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:08,499 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:09:08,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:08,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571464143] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:08,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:08,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:09:08,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498674358] [2022-02-10 03:09:08,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:08,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:08,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:08,521 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) [2022-02-10 03:09:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:09,931 INFO L93 Difference]: Finished difference Result 1450 states and 3944 transitions. [2022-02-10 03:09:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-10 03:09:09,932 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 [2022-02-10 03:09:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:09,933 INFO L225 Difference]: With dead ends: 1450 [2022-02-10 03:09:09,933 INFO L226 Difference]: Without dead ends: 1443 [2022-02-10 03:09:09,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=522, Invalid=3900, Unknown=0, NotChecked=0, Total=4422 [2022-02-10 03:09:09,934 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 174 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-10 03:09:09,934 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] [2022-02-10 03:09:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-02-10 03:09:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1239. [2022-02-10 03:09:09,946 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) [2022-02-10 03:09:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3603 transitions. [2022-02-10 03:09:09,948 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3603 transitions. Word has length 17 [2022-02-10 03:09:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:09,948 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 3603 transitions. [2022-02-10 03:09:09,948 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) [2022-02-10 03:09:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3603 transitions. [2022-02-10 03:09:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:09,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:09,949 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:09,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-02-10 03:09:10,150 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 [2022-02-10 03:09:10,150 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:10,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1975359119, now seen corresponding path program 339 times [2022-02-10 03:09:10,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:10,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776157302] [2022-02-10 03:09:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:10,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:10,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:10,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776157302] [2022-02-10 03:09:10,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776157302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:10,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365336660] [2022-02-10 03:09:10,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:10,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:10,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:10,238 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) [2022-02-10 03:09:10,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-02-10 03:09:10,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:09:10,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:10,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:10,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:10,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:10,380 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:09:10,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:10,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:10,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:10,525 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:10,525 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 [2022-02-10 03:09:10,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:10,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365336660] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:10,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:10,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:09:10,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342677966] [2022-02-10 03:09:10,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:10,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:10,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:10,548 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) [2022-02-10 03:09:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:11,521 INFO L93 Difference]: Finished difference Result 1436 states and 3895 transitions. [2022-02-10 03:09:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-10 03:09:11,522 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 [2022-02-10 03:09:11,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:11,523 INFO L225 Difference]: With dead ends: 1436 [2022-02-10 03:09:11,524 INFO L226 Difference]: Without dead ends: 1435 [2022-02-10 03:09:11,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=2032, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 03:09:11,524 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-10 03:09:11,524 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] [2022-02-10 03:09:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-02-10 03:09:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1206. [2022-02-10 03:09:11,536 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) [2022-02-10 03:09:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 3478 transitions. [2022-02-10 03:09:11,538 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 3478 transitions. Word has length 17 [2022-02-10 03:09:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:11,538 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 3478 transitions. [2022-02-10 03:09:11,538 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) [2022-02-10 03:09:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 3478 transitions. [2022-02-10 03:09:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:11,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:11,539 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:11,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-02-10 03:09:11,739 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 [2022-02-10 03:09:11,740 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:11,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:11,740 INFO L85 PathProgramCache]: Analyzing trace with hash 608994869, now seen corresponding path program 340 times [2022-02-10 03:09:11,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:11,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086665992] [2022-02-10 03:09:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:11,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:11,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:11,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086665992] [2022-02-10 03:09:11,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086665992] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:11,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633276680] [2022-02-10 03:09:11,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:11,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:11,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:11,827 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) [2022-02-10 03:09:11,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-02-10 03:09:11,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:11,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:11,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:11,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:11,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:11,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:11,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:11,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:11,996 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 8 treesize of output 1 [2022-02-10 03:09:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:12,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:12,107 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:12,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:12,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:12,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633276680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:12,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:12,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:09:12,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497360926] [2022-02-10 03:09:12,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:12,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:12,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:12,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:12,130 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) [2022-02-10 03:09:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:13,068 INFO L93 Difference]: Finished difference Result 1362 states and 3732 transitions. [2022-02-10 03:09:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:09:13,068 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 [2022-02-10 03:09:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:13,070 INFO L225 Difference]: With dead ends: 1362 [2022-02-10 03:09:13,070 INFO L226 Difference]: Without dead ends: 1362 [2022-02-10 03:09:13,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-02-10 03:09:13,071 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:13,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 138 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:09:13,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2022-02-10 03:09:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1176. [2022-02-10 03:09:13,082 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) [2022-02-10 03:09:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3386 transitions. [2022-02-10 03:09:13,084 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3386 transitions. Word has length 17 [2022-02-10 03:09:13,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:13,084 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 3386 transitions. [2022-02-10 03:09:13,084 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) [2022-02-10 03:09:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3386 transitions. [2022-02-10 03:09:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:13,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:13,085 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:13,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2022-02-10 03:09:13,285 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 [2022-02-10 03:09:13,286 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash -880410127, now seen corresponding path program 341 times [2022-02-10 03:09:13,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:13,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257457760] [2022-02-10 03:09:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:13,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:13,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:13,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257457760] [2022-02-10 03:09:13,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257457760] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:13,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283624717] [2022-02-10 03:09:13,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:13,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:13,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:13,377 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) [2022-02-10 03:09:13,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-02-10 03:09:13,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:09:13,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:13,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:13,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:13,532 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 29 treesize of output 23 [2022-02-10 03:09:13,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:13,534 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 7 treesize of output 1 [2022-02-10 03:09:13,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:13,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:13,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:13,643 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:13,644 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 30 treesize of output 27 [2022-02-10 03:09:13,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:13,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283624717] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:13,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:13,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-10 03:09:13,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467193623] [2022-02-10 03:09:13,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:13,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:13,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:13,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:13,666 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) [2022-02-10 03:09:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:14,050 INFO L93 Difference]: Finished difference Result 1293 states and 3580 transitions. [2022-02-10 03:09:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:09:14,051 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 [2022-02-10 03:09:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:14,052 INFO L225 Difference]: With dead ends: 1293 [2022-02-10 03:09:14,052 INFO L226 Difference]: Without dead ends: 1293 [2022-02-10 03:09:14,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:09:14,052 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:14,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 158 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:09:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-02-10 03:09:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1166. [2022-02-10 03:09:14,063 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) [2022-02-10 03:09:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 3351 transitions. [2022-02-10 03:09:14,065 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 3351 transitions. Word has length 17 [2022-02-10 03:09:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:14,065 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 3351 transitions. [2022-02-10 03:09:14,065 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) [2022-02-10 03:09:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 3351 transitions. [2022-02-10 03:09:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:14,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:14,066 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:14,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-02-10 03:09:14,266 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 [2022-02-10 03:09:14,267 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:14,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1644528931, now seen corresponding path program 342 times [2022-02-10 03:09:14,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:14,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939638984] [2022-02-10 03:09:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:14,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:14,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:14,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939638984] [2022-02-10 03:09:14,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939638984] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:14,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504013358] [2022-02-10 03:09:14,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:14,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:14,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:14,360 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) [2022-02-10 03:09:14,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-02-10 03:09:14,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:09:14,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:14,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:14,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:14,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:14,555 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 29 treesize of output 23 [2022-02-10 03:09:14,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:14,557 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 21 treesize of output 2 [2022-02-10 03:09:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:14,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:14,662 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:14,662 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:09:14,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:14,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504013358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:14,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:14,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:09:14,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661278760] [2022-02-10 03:09:14,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:14,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:14,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:14,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:14,681 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) [2022-02-10 03:09:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:14,904 INFO L93 Difference]: Finished difference Result 1342 states and 3741 transitions. [2022-02-10 03:09:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:09:14,905 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 [2022-02-10 03:09:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:14,906 INFO L225 Difference]: With dead ends: 1342 [2022-02-10 03:09:14,906 INFO L226 Difference]: Without dead ends: 1342 [2022-02-10 03:09:14,907 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 [2022-02-10 03:09:14,907 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:14,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 188 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 519 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-02-10 03:09:14,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-02-10 03:09:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1248. [2022-02-10 03:09:14,918 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) [2022-02-10 03:09:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3621 transitions. [2022-02-10 03:09:14,920 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3621 transitions. Word has length 17 [2022-02-10 03:09:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:14,921 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3621 transitions. [2022-02-10 03:09:14,921 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) [2022-02-10 03:09:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3621 transitions. [2022-02-10 03:09:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:14,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:14,922 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:14,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-02-10 03:09:15,122 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 [2022-02-10 03:09:15,122 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash 416330871, now seen corresponding path program 343 times [2022-02-10 03:09:15,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:15,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281636146] [2022-02-10 03:09:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:15,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:15,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:15,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281636146] [2022-02-10 03:09:15,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281636146] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:15,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273813283] [2022-02-10 03:09:15,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:15,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:15,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:15,216 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) [2022-02-10 03:09:15,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-02-10 03:09:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:15,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:15,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:15,407 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 29 treesize of output 23 [2022-02-10 03:09:15,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:15,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:15,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:15,516 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:15,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:15,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:15,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273813283] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:15,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:15,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:09:15,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717193745] [2022-02-10 03:09:15,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:15,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:15,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:15,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:15,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:15,535 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) [2022-02-10 03:09:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:15,775 INFO L93 Difference]: Finished difference Result 1351 states and 3771 transitions. [2022-02-10 03:09:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:09:15,775 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 [2022-02-10 03:09:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:15,777 INFO L225 Difference]: With dead ends: 1351 [2022-02-10 03:09:15,777 INFO L226 Difference]: Without dead ends: 1351 [2022-02-10 03:09:15,778 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 [2022-02-10 03:09:15,778 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:09:15,778 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] [2022-02-10 03:09:15,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-02-10 03:09:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1248. [2022-02-10 03:09:15,795 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) [2022-02-10 03:09:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3621 transitions. [2022-02-10 03:09:15,797 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3621 transitions. Word has length 17 [2022-02-10 03:09:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:15,797 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3621 transitions. [2022-02-10 03:09:15,797 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) [2022-02-10 03:09:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3621 transitions. [2022-02-10 03:09:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:15,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:15,799 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:15,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-02-10 03:09:15,999 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 [2022-02-10 03:09:15,999 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:15,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2145378205, now seen corresponding path program 344 times [2022-02-10 03:09:16,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:16,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495893583] [2022-02-10 03:09:16,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:16,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:16,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:16,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495893583] [2022-02-10 03:09:16,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495893583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:16,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602474542] [2022-02-10 03:09:16,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:16,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:16,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:16,092 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) [2022-02-10 03:09:16,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-02-10 03:09:16,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:16,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:16,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:16,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:16,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:16,285 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 29 treesize of output 23 [2022-02-10 03:09:16,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:16,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:16,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:16,397 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:16,397 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 30 treesize of output 27 [2022-02-10 03:09:16,399 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 13 treesize of output 9 [2022-02-10 03:09:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:16,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602474542] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:16,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:16,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:09:16,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079149443] [2022-02-10 03:09:16,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:16,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:16,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:16,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:16,416 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) [2022-02-10 03:09:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:16,642 INFO L93 Difference]: Finished difference Result 1341 states and 3742 transitions. [2022-02-10 03:09:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:09:16,642 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 [2022-02-10 03:09:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:16,644 INFO L225 Difference]: With dead ends: 1341 [2022-02-10 03:09:16,644 INFO L226 Difference]: Without dead ends: 1341 [2022-02-10 03:09:16,644 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 [2022-02-10 03:09:16,644 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:16,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 188 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 538 Invalid, 0 Unknown, 181 Unchecked, 0.2s Time] [2022-02-10 03:09:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-02-10 03:09:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1248. [2022-02-10 03:09:16,656 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) [2022-02-10 03:09:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3621 transitions. [2022-02-10 03:09:16,658 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3621 transitions. Word has length 17 [2022-02-10 03:09:16,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:16,658 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3621 transitions. [2022-02-10 03:09:16,658 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) [2022-02-10 03:09:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3621 transitions. [2022-02-10 03:09:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:16,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:16,660 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:16,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-02-10 03:09:16,860 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 [2022-02-10 03:09:16,860 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:16,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:16,860 INFO L85 PathProgramCache]: Analyzing trace with hash -713646343, now seen corresponding path program 345 times [2022-02-10 03:09:16,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:16,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889986684] [2022-02-10 03:09:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:16,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:16,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:16,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889986684] [2022-02-10 03:09:16,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889986684] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:16,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492990076] [2022-02-10 03:09:16,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:16,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:16,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:16,953 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) [2022-02-10 03:09:16,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-02-10 03:09:16,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:09:16,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:16,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:17,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:17,175 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 37 treesize of output 31 [2022-02-10 03:09:17,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:17,177 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 31 treesize of output 25 [2022-02-10 03:09:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:17,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:17,294 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:17,294 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:09:17,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:17,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492990076] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:17,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:17,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:09:17,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226331796] [2022-02-10 03:09:17,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:17,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:17,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:17,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:17,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:17,317 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) [2022-02-10 03:09:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:17,650 INFO L93 Difference]: Finished difference Result 1323 states and 3708 transitions. [2022-02-10 03:09:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:09:17,650 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 [2022-02-10 03:09:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:17,652 INFO L225 Difference]: With dead ends: 1323 [2022-02-10 03:09:17,652 INFO L226 Difference]: Without dead ends: 1315 [2022-02-10 03:09:17,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:09:17,653 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 [2022-02-10 03:09:17,653 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] [2022-02-10 03:09:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-02-10 03:09:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1254. [2022-02-10 03:09:17,664 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) [2022-02-10 03:09:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 3625 transitions. [2022-02-10 03:09:17,666 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 3625 transitions. Word has length 17 [2022-02-10 03:09:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:17,666 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 3625 transitions. [2022-02-10 03:09:17,666 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) [2022-02-10 03:09:17,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 3625 transitions. [2022-02-10 03:09:17,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:17,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:17,668 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:17,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-02-10 03:09:17,868 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 [2022-02-10 03:09:17,868 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:17,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1489416251, now seen corresponding path program 346 times [2022-02-10 03:09:17,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:17,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906465159] [2022-02-10 03:09:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:17,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:17,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:17,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906465159] [2022-02-10 03:09:17,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906465159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:17,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126487844] [2022-02-10 03:09:17,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:17,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:17,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:17,966 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) [2022-02-10 03:09:17,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-02-10 03:09:17,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:17,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:17,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:18,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:18,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:18,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:18,187 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 21 treesize of output 2 [2022-02-10 03:09:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:18,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:18,307 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:18,307 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:09:18,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:18,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126487844] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:18,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:18,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:09:18,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108591810] [2022-02-10 03:09:18,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:18,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:18,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:18,326 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) [2022-02-10 03:09:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:18,881 INFO L93 Difference]: Finished difference Result 1423 states and 3907 transitions. [2022-02-10 03:09:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:09:18,881 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 [2022-02-10 03:09:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:18,883 INFO L225 Difference]: With dead ends: 1423 [2022-02-10 03:09:18,883 INFO L226 Difference]: Without dead ends: 1423 [2022-02-10 03:09:18,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:09:18,883 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 [2022-02-10 03:09:18,883 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] [2022-02-10 03:09:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-02-10 03:09:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1271. [2022-02-10 03:09:18,896 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) [2022-02-10 03:09:18,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 3691 transitions. [2022-02-10 03:09:18,898 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 3691 transitions. Word has length 17 [2022-02-10 03:09:18,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:18,898 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 3691 transitions. [2022-02-10 03:09:18,898 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) [2022-02-10 03:09:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 3691 transitions. [2022-02-10 03:09:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:18,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:18,899 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:18,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:19,100 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 [2022-02-10 03:09:19,100 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:19,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1076503711, now seen corresponding path program 347 times [2022-02-10 03:09:19,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:19,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313480108] [2022-02-10 03:09:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:19,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:19,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:19,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313480108] [2022-02-10 03:09:19,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313480108] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:19,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237576344] [2022-02-10 03:09:19,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:19,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:19,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:19,196 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) [2022-02-10 03:09:19,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-02-10 03:09:19,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:09:19,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:19,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:19,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:19,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:19,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:19,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:19,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:19,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:19,524 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:19,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:19,526 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 [2022-02-10 03:09:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:19,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237576344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:19,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:19,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:09:19,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744906336] [2022-02-10 03:09:19,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:19,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:19,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:19,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:19,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:19,543 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) [2022-02-10 03:09:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:20,200 INFO L93 Difference]: Finished difference Result 1398 states and 3863 transitions. [2022-02-10 03:09:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 03:09:20,201 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 [2022-02-10 03:09:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:20,202 INFO L225 Difference]: With dead ends: 1398 [2022-02-10 03:09:20,202 INFO L226 Difference]: Without dead ends: 1398 [2022-02-10 03:09:20,203 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 [2022-02-10 03:09:20,203 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 [2022-02-10 03:09:20,203 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] [2022-02-10 03:09:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2022-02-10 03:09:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1255. [2022-02-10 03:09:20,215 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) [2022-02-10 03:09:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 3644 transitions. [2022-02-10 03:09:20,217 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 3644 transitions. Word has length 17 [2022-02-10 03:09:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:20,217 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 3644 transitions. [2022-02-10 03:09:20,217 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) [2022-02-10 03:09:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 3644 transitions. [2022-02-10 03:09:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:20,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:20,219 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:20,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:20,419 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 [2022-02-10 03:09:20,419 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:20,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1251501921, now seen corresponding path program 348 times [2022-02-10 03:09:20,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:20,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425519225] [2022-02-10 03:09:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:20,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:20,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:20,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425519225] [2022-02-10 03:09:20,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425519225] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:20,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189313777] [2022-02-10 03:09:20,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:20,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:20,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:20,515 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) [2022-02-10 03:09:20,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-02-10 03:09:20,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:09:20,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:20,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:20,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:20,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:20,747 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 37 treesize of output 31 [2022-02-10 03:09:20,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:20,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:20,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:20,877 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:20,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:20,879 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 21 treesize of output 13 [2022-02-10 03:09:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:20,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189313777] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:20,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:20,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:09:20,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929803833] [2022-02-10 03:09:20,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:20,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:20,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:20,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:20,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:20,902 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) [2022-02-10 03:09:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:21,428 INFO L93 Difference]: Finished difference Result 1339 states and 3744 transitions. [2022-02-10 03:09:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:09:21,428 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 [2022-02-10 03:09:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:21,430 INFO L225 Difference]: With dead ends: 1339 [2022-02-10 03:09:21,430 INFO L226 Difference]: Without dead ends: 1333 [2022-02-10 03:09:21,430 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 [2022-02-10 03:09:21,430 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:21,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 152 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 676 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-02-10 03:09:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-02-10 03:09:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1259. [2022-02-10 03:09:21,443 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) [2022-02-10 03:09:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 3651 transitions. [2022-02-10 03:09:21,445 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 3651 transitions. Word has length 17 [2022-02-10 03:09:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:21,445 INFO L470 AbstractCegarLoop]: Abstraction has 1259 states and 3651 transitions. [2022-02-10 03:09:21,445 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) [2022-02-10 03:09:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 3651 transitions. [2022-02-10 03:09:21,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:21,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:21,446 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:21,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Ended with exit code 0 [2022-02-10 03:09:21,646 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 [2022-02-10 03:09:21,647 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:21,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1729058589, now seen corresponding path program 349 times [2022-02-10 03:09:21,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:21,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523105876] [2022-02-10 03:09:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:21,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:21,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:21,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523105876] [2022-02-10 03:09:21,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523105876] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:21,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462893362] [2022-02-10 03:09:21,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:21,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:21,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:21,746 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) [2022-02-10 03:09:21,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-02-10 03:09:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:21,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:21,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:21,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:21,959 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 [2022-02-10 03:09:21,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:21,961 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 21 treesize of output 2 [2022-02-10 03:09:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:21,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:22,096 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:22,097 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 30 treesize of output 27 [2022-02-10 03:09:22,098 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 13 treesize of output 9 [2022-02-10 03:09:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:22,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462893362] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:22,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:22,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:09:22,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547394802] [2022-02-10 03:09:22,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:22,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:22,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:22,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:22,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:22,116 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) [2022-02-10 03:09:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:23,020 INFO L93 Difference]: Finished difference Result 1451 states and 3964 transitions. [2022-02-10 03:09:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:09:23,020 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 [2022-02-10 03:09:23,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:23,022 INFO L225 Difference]: With dead ends: 1451 [2022-02-10 03:09:23,022 INFO L226 Difference]: Without dead ends: 1449 [2022-02-10 03:09:23,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:09:23,022 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 [2022-02-10 03:09:23,022 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] [2022-02-10 03:09:23,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-02-10 03:09:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1245. [2022-02-10 03:09:23,041 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) [2022-02-10 03:09:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3609 transitions. [2022-02-10 03:09:23,043 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3609 transitions. Word has length 17 [2022-02-10 03:09:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:23,043 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 3609 transitions. [2022-02-10 03:09:23,043 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) [2022-02-10 03:09:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3609 transitions. [2022-02-10 03:09:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:23,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:23,044 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:23,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Ended with exit code 0 [2022-02-10 03:09:23,245 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 [2022-02-10 03:09:23,245 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:23,245 INFO L85 PathProgramCache]: Analyzing trace with hash 809357881, now seen corresponding path program 350 times [2022-02-10 03:09:23,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:23,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498311688] [2022-02-10 03:09:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:23,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:23,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:23,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498311688] [2022-02-10 03:09:23,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498311688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:23,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603683674] [2022-02-10 03:09:23,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:23,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:23,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:23,343 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) [2022-02-10 03:09:23,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-02-10 03:09:23,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:23,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:23,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:23,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:23,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:23,560 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 37 treesize of output 31 [2022-02-10 03:09:23,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:23,562 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 31 treesize of output 25 [2022-02-10 03:09:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:23,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:23,708 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:23,708 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 42 treesize of output 35 [2022-02-10 03:09:23,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:23,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603683674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:23,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:23,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:09:23,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324613411] [2022-02-10 03:09:23,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:23,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:23,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:23,732 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) [2022-02-10 03:09:24,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:24,258 INFO L93 Difference]: Finished difference Result 1304 states and 3675 transitions. [2022-02-10 03:09:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:09:24,259 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 [2022-02-10 03:09:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:24,260 INFO L225 Difference]: With dead ends: 1304 [2022-02-10 03:09:24,261 INFO L226 Difference]: Without dead ends: 1298 [2022-02-10 03:09:24,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:09:24,261 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 [2022-02-10 03:09:24,261 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] [2022-02-10 03:09:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-02-10 03:09:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1246. [2022-02-10 03:09:24,279 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) [2022-02-10 03:09:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3607 transitions. [2022-02-10 03:09:24,281 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3607 transitions. Word has length 17 [2022-02-10 03:09:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:24,281 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 3607 transitions. [2022-02-10 03:09:24,281 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) [2022-02-10 03:09:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3607 transitions. [2022-02-10 03:09:24,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:24,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:24,282 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:24,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:24,482 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 [2022-02-10 03:09:24,483 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1736788987, now seen corresponding path program 351 times [2022-02-10 03:09:24,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:24,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983903212] [2022-02-10 03:09:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:24,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:24,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:24,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983903212] [2022-02-10 03:09:24,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983903212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:24,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160152847] [2022-02-10 03:09:24,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:24,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:24,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:24,575 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) [2022-02-10 03:09:24,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-02-10 03:09:24,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:09:24,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:24,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:09:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:24,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:24,743 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 43 treesize of output 35 [2022-02-10 03:09:24,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:24,745 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 35 treesize of output 27 [2022-02-10 03:09:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:24,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:24,911 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:24,911 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:09:24,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:24,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160152847] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:24,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:24,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:09:24,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096797079] [2022-02-10 03:09:24,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:24,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:24,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:24,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:24,931 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) [2022-02-10 03:09:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:25,800 INFO L93 Difference]: Finished difference Result 1405 states and 3781 transitions. [2022-02-10 03:09:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:09:25,800 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 [2022-02-10 03:09:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:25,802 INFO L225 Difference]: With dead ends: 1405 [2022-02-10 03:09:25,802 INFO L226 Difference]: Without dead ends: 1403 [2022-02-10 03:09:25,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:09:25,802 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:25,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 128 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-02-10 03:09:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1199. [2022-02-10 03:09:25,813 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) [2022-02-10 03:09:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3438 transitions. [2022-02-10 03:09:25,815 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3438 transitions. Word has length 17 [2022-02-10 03:09:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:25,815 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 3438 transitions. [2022-02-10 03:09:25,816 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) [2022-02-10 03:09:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3438 transitions. [2022-02-10 03:09:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:25,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:25,817 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:25,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-02-10 03:09:26,017 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 [2022-02-10 03:09:26,017 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1756562081, now seen corresponding path program 352 times [2022-02-10 03:09:26,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:26,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2432451] [2022-02-10 03:09:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:26,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:26,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:26,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2432451] [2022-02-10 03:09:26,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2432451] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:26,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299778282] [2022-02-10 03:09:26,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:26,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:26,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:26,117 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) [2022-02-10 03:09:26,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-02-10 03:09:26,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:26,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:26,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:26,286 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 43 treesize of output 35 [2022-02-10 03:09:26,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:26,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:26,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:26,459 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:26,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:26,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:26,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299778282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:26,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:26,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:09:26,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088537140] [2022-02-10 03:09:26,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:26,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:26,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:26,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:26,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:26,483 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) [2022-02-10 03:09:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:27,033 INFO L93 Difference]: Finished difference Result 1273 states and 3545 transitions. [2022-02-10 03:09:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:09:27,034 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 [2022-02-10 03:09:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:27,035 INFO L225 Difference]: With dead ends: 1273 [2022-02-10 03:09:27,035 INFO L226 Difference]: Without dead ends: 1269 [2022-02-10 03:09:27,035 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 [2022-02-10 03:09:27,035 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 [2022-02-10 03:09:27,035 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] [2022-02-10 03:09:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-02-10 03:09:27,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1205. [2022-02-10 03:09:27,046 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) [2022-02-10 03:09:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 3453 transitions. [2022-02-10 03:09:27,048 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 3453 transitions. Word has length 17 [2022-02-10 03:09:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:27,048 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 3453 transitions. [2022-02-10 03:09:27,048 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) [2022-02-10 03:09:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 3453 transitions. [2022-02-10 03:09:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:27,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:27,049 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:27,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-02-10 03:09:27,250 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 [2022-02-10 03:09:27,250 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:27,250 INFO L85 PathProgramCache]: Analyzing trace with hash -38218375, now seen corresponding path program 353 times [2022-02-10 03:09:27,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:27,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009435482] [2022-02-10 03:09:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:27,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:27,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:27,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009435482] [2022-02-10 03:09:27,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009435482] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:27,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338718695] [2022-02-10 03:09:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:27,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:27,351 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) [2022-02-10 03:09:27,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-02-10 03:09:27,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:09:27,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:27,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:27,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:27,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:27,522 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:09:27,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:27,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:27,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:27,686 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:27,687 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 42 treesize of output 35 [2022-02-10 03:09:27,688 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 [2022-02-10 03:09:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:27,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338718695] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:27,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:27,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:09:27,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459454589] [2022-02-10 03:09:27,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:27,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:27,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:27,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:27,710 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) [2022-02-10 03:09:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:28,048 INFO L93 Difference]: Finished difference Result 1263 states and 3527 transitions. [2022-02-10 03:09:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:09:28,049 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 [2022-02-10 03:09:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:28,050 INFO L225 Difference]: With dead ends: 1263 [2022-02-10 03:09:28,050 INFO L226 Difference]: Without dead ends: 1263 [2022-02-10 03:09:28,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:09:28,051 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 [2022-02-10 03:09:28,051 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] [2022-02-10 03:09:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-02-10 03:09:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1186. [2022-02-10 03:09:28,067 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) [2022-02-10 03:09:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 3400 transitions. [2022-02-10 03:09:28,068 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 3400 transitions. Word has length 17 [2022-02-10 03:09:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:28,069 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 3400 transitions. [2022-02-10 03:09:28,069 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) [2022-02-10 03:09:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 3400 transitions. [2022-02-10 03:09:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:28,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:28,070 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:28,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:28,270 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 [2022-02-10 03:09:28,270 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:28,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2044748711, now seen corresponding path program 354 times [2022-02-10 03:09:28,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:28,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671909267] [2022-02-10 03:09:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:28,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:28,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:28,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671909267] [2022-02-10 03:09:28,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671909267] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:28,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713454338] [2022-02-10 03:09:28,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:28,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:28,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:28,359 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) [2022-02-10 03:09:28,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-02-10 03:09:28,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:09:28,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:28,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:28,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:28,513 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-10 03:09:28,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:28,515 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-10 03:09:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:28,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:28,663 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:28,663 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:09:28,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:28,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713454338] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:28,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:28,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:09:28,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062264046] [2022-02-10 03:09:28,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:28,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:28,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:28,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:28,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:28,684 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) [2022-02-10 03:09:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:29,261 INFO L93 Difference]: Finished difference Result 1244 states and 3512 transitions. [2022-02-10 03:09:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:09:29,261 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 [2022-02-10 03:09:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:29,263 INFO L225 Difference]: With dead ends: 1244 [2022-02-10 03:09:29,263 INFO L226 Difference]: Without dead ends: 1242 [2022-02-10 03:09:29,263 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 [2022-02-10 03:09:29,263 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:29,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-02-10 03:09:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1180. [2022-02-10 03:09:29,273 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) [2022-02-10 03:09:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3381 transitions. [2022-02-10 03:09:29,275 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3381 transitions. Word has length 17 [2022-02-10 03:09:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:29,275 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3381 transitions. [2022-02-10 03:09:29,275 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) [2022-02-10 03:09:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3381 transitions. [2022-02-10 03:09:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:29,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:29,277 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:29,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-02-10 03:09:29,477 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 [2022-02-10 03:09:29,477 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1683195255, now seen corresponding path program 355 times [2022-02-10 03:09:29,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:29,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717762876] [2022-02-10 03:09:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:29,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:29,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:29,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717762876] [2022-02-10 03:09:29,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717762876] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:29,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648464809] [2022-02-10 03:09:29,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:29,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:29,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:29,565 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) [2022-02-10 03:09:29,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-02-10 03:09:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:29,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:29,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:29,743 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 29 treesize of output 23 [2022-02-10 03:09:29,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:29,745 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 21 treesize of output 2 [2022-02-10 03:09:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:29,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:29,843 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:29,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:29,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:29,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648464809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:29,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:29,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:09:29,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803883754] [2022-02-10 03:09:29,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:29,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:29,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:29,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:29,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:29,865 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) [2022-02-10 03:09:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:30,148 INFO L93 Difference]: Finished difference Result 1321 states and 3662 transitions. [2022-02-10 03:09:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:09:30,149 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 [2022-02-10 03:09:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:30,154 INFO L225 Difference]: With dead ends: 1321 [2022-02-10 03:09:30,154 INFO L226 Difference]: Without dead ends: 1321 [2022-02-10 03:09:30,154 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 [2022-02-10 03:09:30,154 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 [2022-02-10 03:09:30,154 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] [2022-02-10 03:09:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-02-10 03:09:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1202. [2022-02-10 03:09:30,177 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) [2022-02-10 03:09:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3459 transitions. [2022-02-10 03:09:30,183 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3459 transitions. Word has length 17 [2022-02-10 03:09:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:30,183 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 3459 transitions. [2022-02-10 03:09:30,183 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) [2022-02-10 03:09:30,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3459 transitions. [2022-02-10 03:09:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:30,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:30,184 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:30,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Ended with exit code 0 [2022-02-10 03:09:30,385 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 [2022-02-10 03:09:30,385 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:30,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1057722917, now seen corresponding path program 356 times [2022-02-10 03:09:30,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:30,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338297091] [2022-02-10 03:09:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:30,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:30,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:30,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338297091] [2022-02-10 03:09:30,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338297091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:30,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551840182] [2022-02-10 03:09:30,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:30,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:30,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:30,469 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) [2022-02-10 03:09:30,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-02-10 03:09:30,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:30,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:30,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:30,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:30,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:30,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:30,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:30,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:30,778 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:30,779 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 42 treesize of output 35 [2022-02-10 03:09:30,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:30,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551840182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:30,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:30,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-02-10 03:09:30,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730694616] [2022-02-10 03:09:30,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:30,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:30,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:30,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:30,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:30,805 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) [2022-02-10 03:09:31,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:31,160 INFO L93 Difference]: Finished difference Result 1262 states and 3531 transitions. [2022-02-10 03:09:31,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:09:31,160 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 [2022-02-10 03:09:31,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:31,163 INFO L225 Difference]: With dead ends: 1262 [2022-02-10 03:09:31,163 INFO L226 Difference]: Without dead ends: 1256 [2022-02-10 03:09:31,163 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 [2022-02-10 03:09:31,163 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 [2022-02-10 03:09:31,163 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] [2022-02-10 03:09:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-02-10 03:09:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1203. [2022-02-10 03:09:31,177 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) [2022-02-10 03:09:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3456 transitions. [2022-02-10 03:09:31,179 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3456 transitions. Word has length 17 [2022-02-10 03:09:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:31,179 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 3456 transitions. [2022-02-10 03:09:31,179 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) [2022-02-10 03:09:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3456 transitions. [2022-02-10 03:09:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:31,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:31,181 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:31,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Ended with exit code 0 [2022-02-10 03:09:31,394 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 [2022-02-10 03:09:31,394 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:31,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1922837593, now seen corresponding path program 357 times [2022-02-10 03:09:31,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:31,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294553662] [2022-02-10 03:09:31,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:31,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:31,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:31,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294553662] [2022-02-10 03:09:31,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294553662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:31,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516375493] [2022-02-10 03:09:31,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:31,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:31,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:31,479 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) [2022-02-10 03:09:31,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-02-10 03:09:31,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:09:31,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:31,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:31,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:31,664 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 29 treesize of output 23 [2022-02-10 03:09:31,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:31,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:31,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:31,782 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:31,782 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 30 treesize of output 27 [2022-02-10 03:09:31,784 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 13 treesize of output 9 [2022-02-10 03:09:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:31,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516375493] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:31,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:31,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:09:31,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037817521] [2022-02-10 03:09:31,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:31,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:31,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:31,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:31,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:31,805 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) [2022-02-10 03:09:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:32,393 INFO L93 Difference]: Finished difference Result 1347 states and 3708 transitions. [2022-02-10 03:09:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:09:32,394 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 [2022-02-10 03:09:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:32,396 INFO L225 Difference]: With dead ends: 1347 [2022-02-10 03:09:32,396 INFO L226 Difference]: Without dead ends: 1344 [2022-02-10 03:09:32,396 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 [2022-02-10 03:09:32,396 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 [2022-02-10 03:09:32,397 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] [2022-02-10 03:09:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-02-10 03:09:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1201. [2022-02-10 03:09:32,409 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) [2022-02-10 03:09:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3448 transitions. [2022-02-10 03:09:32,411 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3448 transitions. Word has length 17 [2022-02-10 03:09:32,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:32,411 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 3448 transitions. [2022-02-10 03:09:32,411 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) [2022-02-10 03:09:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3448 transitions. [2022-02-10 03:09:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:32,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:32,413 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:32,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-02-10 03:09:32,627 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 [2022-02-10 03:09:32,627 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:32,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:32,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1003136885, now seen corresponding path program 358 times [2022-02-10 03:09:32,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:32,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406867579] [2022-02-10 03:09:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:32,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:32,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:32,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406867579] [2022-02-10 03:09:32,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406867579] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:32,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072585605] [2022-02-10 03:09:32,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:32,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:32,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:32,712 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) [2022-02-10 03:09:32,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-02-10 03:09:32,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:32,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:32,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:32,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:32,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:32,903 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:09:32,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:32,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:32,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:33,021 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:33,022 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 42 treesize of output 35 [2022-02-10 03:09:33,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:33,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072585605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:33,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:33,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:09:33,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518952225] [2022-02-10 03:09:33,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:33,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:33,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:33,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:33,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:33,054 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) [2022-02-10 03:09:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:33,486 INFO L93 Difference]: Finished difference Result 1256 states and 3516 transitions. [2022-02-10 03:09:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:09:33,486 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 [2022-02-10 03:09:33,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:33,489 INFO L225 Difference]: With dead ends: 1256 [2022-02-10 03:09:33,489 INFO L226 Difference]: Without dead ends: 1251 [2022-02-10 03:09:33,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:09:33,489 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 [2022-02-10 03:09:33,489 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] [2022-02-10 03:09:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-02-10 03:09:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1202. [2022-02-10 03:09:33,501 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) [2022-02-10 03:09:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3446 transitions. [2022-02-10 03:09:33,503 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3446 transitions. Word has length 17 [2022-02-10 03:09:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:33,503 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 3446 transitions. [2022-02-10 03:09:33,503 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) [2022-02-10 03:09:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3446 transitions. [2022-02-10 03:09:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:33,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:33,504 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:33,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2022-02-10 03:09:33,720 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 [2022-02-10 03:09:33,720 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:33,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1930567991, now seen corresponding path program 359 times [2022-02-10 03:09:33,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:33,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31696929] [2022-02-10 03:09:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:33,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:33,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:33,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31696929] [2022-02-10 03:09:33,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31696929] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:33,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513856035] [2022-02-10 03:09:33,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:33,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:33,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:33,806 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) [2022-02-10 03:09:33,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-02-10 03:09:33,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:09:33,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:33,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:33,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:33,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:33,962 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 43 treesize of output 35 [2022-02-10 03:09:33,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:33,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:34,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:34,122 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:34,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:34,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:34,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513856035] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:34,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:34,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-02-10 03:09:34,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824612605] [2022-02-10 03:09:34,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:34,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:34,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:34,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:34,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:34,144 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) [2022-02-10 03:09:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:34,817 INFO L93 Difference]: Finished difference Result 1445 states and 3853 transitions. [2022-02-10 03:09:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:09:34,817 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 [2022-02-10 03:09:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:34,819 INFO L225 Difference]: With dead ends: 1445 [2022-02-10 03:09:34,819 INFO L226 Difference]: Without dead ends: 1441 [2022-02-10 03:09:34,819 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 [2022-02-10 03:09:34,820 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:09:34,820 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] [2022-02-10 03:09:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2022-02-10 03:09:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1203. [2022-02-10 03:09:34,831 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) [2022-02-10 03:09:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3448 transitions. [2022-02-10 03:09:34,833 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3448 transitions. Word has length 17 [2022-02-10 03:09:34,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:34,833 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 3448 transitions. [2022-02-10 03:09:34,834 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) [2022-02-10 03:09:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3448 transitions. [2022-02-10 03:09:34,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:34,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:34,835 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:34,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-02-10 03:09:35,050 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 [2022-02-10 03:09:35,051 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:35,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:35,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1562783077, now seen corresponding path program 360 times [2022-02-10 03:09:35,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:35,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33942456] [2022-02-10 03:09:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:35,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:35,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:35,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33942456] [2022-02-10 03:09:35,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33942456] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:35,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143299898] [2022-02-10 03:09:35,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:35,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:35,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:35,138 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) [2022-02-10 03:09:35,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-02-10 03:09:35,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:09:35,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:35,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:35,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:35,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:35,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:35,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:35,289 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 35 treesize of output 27 [2022-02-10 03:09:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:35,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:35,451 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:35,451 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-10 03:09:35,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:35,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143299898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:35,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:35,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-02-10 03:09:35,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928514909] [2022-02-10 03:09:35,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:35,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:35,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:35,478 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) [2022-02-10 03:09:36,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:36,027 INFO L93 Difference]: Finished difference Result 1325 states and 3629 transitions. [2022-02-10 03:09:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 03:09:36,027 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 [2022-02-10 03:09:36,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:36,030 INFO L225 Difference]: With dead ends: 1325 [2022-02-10 03:09:36,030 INFO L226 Difference]: Without dead ends: 1321 [2022-02-10 03:09:36,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:09:36,030 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 [2022-02-10 03:09:36,030 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] [2022-02-10 03:09:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-02-10 03:09:36,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1213. [2022-02-10 03:09:36,042 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) [2022-02-10 03:09:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 3479 transitions. [2022-02-10 03:09:36,044 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 3479 transitions. Word has length 17 [2022-02-10 03:09:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:36,044 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 3479 transitions. [2022-02-10 03:09:36,044 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) [2022-02-10 03:09:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 3479 transitions. [2022-02-10 03:09:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:36,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:36,046 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:36,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2022-02-10 03:09:36,250 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 [2022-02-10 03:09:36,250 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:36,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:36,250 INFO L85 PathProgramCache]: Analyzing trace with hash 155560629, now seen corresponding path program 361 times [2022-02-10 03:09:36,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:36,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877962595] [2022-02-10 03:09:36,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:36,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:36,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:36,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877962595] [2022-02-10 03:09:36,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877962595] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:36,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535113648] [2022-02-10 03:09:36,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:36,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:36,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:36,348 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) [2022-02-10 03:09:36,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-02-10 03:09:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:36,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:36,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:36,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:36,501 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 43 treesize of output 35 [2022-02-10 03:09:36,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:36,503 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 35 treesize of output 27 [2022-02-10 03:09:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:36,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:36,643 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:36,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:36,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:36,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535113648] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:36,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:36,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-02-10 03:09:36,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484257190] [2022-02-10 03:09:36,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:36,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:36,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:36,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:36,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:36,670 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) [2022-02-10 03:09:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:37,102 INFO L93 Difference]: Finished difference Result 1299 states and 3589 transitions. [2022-02-10 03:09:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:09:37,102 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 [2022-02-10 03:09:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:37,105 INFO L225 Difference]: With dead ends: 1299 [2022-02-10 03:09:37,105 INFO L226 Difference]: Without dead ends: 1299 [2022-02-10 03:09:37,105 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 [2022-02-10 03:09:37,105 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:37,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 184 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:09:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-02-10 03:09:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1196. [2022-02-10 03:09:37,116 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) [2022-02-10 03:09:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 3410 transitions. [2022-02-10 03:09:37,118 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 3410 transitions. Word has length 17 [2022-02-10 03:09:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:37,118 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 3410 transitions. [2022-02-10 03:09:37,118 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) [2022-02-10 03:09:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 3410 transitions. [2022-02-10 03:09:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:37,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:37,119 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:37,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Ended with exit code 0 [2022-02-10 03:09:37,320 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 [2022-02-10 03:09:37,320 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:37,320 INFO L85 PathProgramCache]: Analyzing trace with hash 316207261, now seen corresponding path program 362 times [2022-02-10 03:09:37,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:37,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261224872] [2022-02-10 03:09:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:37,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:37,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:37,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261224872] [2022-02-10 03:09:37,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261224872] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:37,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680765971] [2022-02-10 03:09:37,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:37,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:37,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:37,413 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) [2022-02-10 03:09:37,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-02-10 03:09:37,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:37,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:37,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:37,555 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 [2022-02-10 03:09:37,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:37,557 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 [2022-02-10 03:09:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:37,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:37,699 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:37,699 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:09:37,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:37,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680765971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:37,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:37,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:09:37,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749599100] [2022-02-10 03:09:37,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:37,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:37,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:37,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:37,722 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) [2022-02-10 03:09:38,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:38,110 INFO L93 Difference]: Finished difference Result 1261 states and 3539 transitions. [2022-02-10 03:09:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:09:38,110 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 [2022-02-10 03:09:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:38,113 INFO L225 Difference]: With dead ends: 1261 [2022-02-10 03:09:38,113 INFO L226 Difference]: Without dead ends: 1259 [2022-02-10 03:09:38,113 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 [2022-02-10 03:09:38,113 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 [2022-02-10 03:09:38,113 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] [2022-02-10 03:09:38,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-02-10 03:09:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1192. [2022-02-10 03:09:38,123 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) [2022-02-10 03:09:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 3393 transitions. [2022-02-10 03:09:38,125 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 3393 transitions. Word has length 17 [2022-02-10 03:09:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:38,125 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 3393 transitions. [2022-02-10 03:09:38,125 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) [2022-02-10 03:09:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 3393 transitions. [2022-02-10 03:09:38,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:38,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:38,126 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:38,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-02-10 03:09:38,326 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 [2022-02-10 03:09:38,327 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:38,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:38,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1950236771, now seen corresponding path program 363 times [2022-02-10 03:09:38,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:38,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701810520] [2022-02-10 03:09:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:38,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:38,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:38,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701810520] [2022-02-10 03:09:38,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701810520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:38,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396718476] [2022-02-10 03:09:38,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:38,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:38,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:38,402 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) [2022-02-10 03:09:38,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-02-10 03:09:38,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:09:38,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:38,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:09:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:38,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:38,569 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 33 treesize of output 25 [2022-02-10 03:09:38,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:38,571 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 2 [2022-02-10 03:09:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:38,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:38,662 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:38,662 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-02-10 03:09:38,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:38,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396718476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:38,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:38,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:09:38,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768285314] [2022-02-10 03:09:38,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:38,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:38,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:38,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:38,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:38,685 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) [2022-02-10 03:09:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:38,895 INFO L93 Difference]: Finished difference Result 1331 states and 3714 transitions. [2022-02-10 03:09:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:09:38,895 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 [2022-02-10 03:09:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:38,897 INFO L225 Difference]: With dead ends: 1331 [2022-02-10 03:09:38,897 INFO L226 Difference]: Without dead ends: 1331 [2022-02-10 03:09:38,897 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 [2022-02-10 03:09:38,897 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 [2022-02-10 03:09:38,897 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] [2022-02-10 03:09:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-02-10 03:09:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1239. [2022-02-10 03:09:38,908 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) [2022-02-10 03:09:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3563 transitions. [2022-02-10 03:09:38,910 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3563 transitions. Word has length 17 [2022-02-10 03:09:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:38,910 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 3563 transitions. [2022-02-10 03:09:38,910 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) [2022-02-10 03:09:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3563 transitions. [2022-02-10 03:09:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:38,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:38,911 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:38,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Ended with exit code 0 [2022-02-10 03:09:39,112 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 [2022-02-10 03:09:39,112 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1425029817, now seen corresponding path program 364 times [2022-02-10 03:09:39,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:39,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108953593] [2022-02-10 03:09:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:39,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:39,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:39,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108953593] [2022-02-10 03:09:39,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108953593] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:39,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008559638] [2022-02-10 03:09:39,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:39,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:39,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:39,184 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) [2022-02-10 03:09:39,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-02-10 03:09:39,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:39,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:39,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:39,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:39,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:39,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:39,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:39,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:39,469 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:39,469 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:09:39,471 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 21 treesize of output 13 [2022-02-10 03:09:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:39,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008559638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:39,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:39,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:09:39,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734963154] [2022-02-10 03:09:39,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:39,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:39,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:39,497 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) [2022-02-10 03:09:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:39,767 INFO L93 Difference]: Finished difference Result 1292 states and 3627 transitions. [2022-02-10 03:09:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:09:39,768 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 [2022-02-10 03:09:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:39,770 INFO L225 Difference]: With dead ends: 1292 [2022-02-10 03:09:39,770 INFO L226 Difference]: Without dead ends: 1288 [2022-02-10 03:09:39,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:09:39,770 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:39,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 84 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 463 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-02-10 03:09:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2022-02-10 03:09:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1239. [2022-02-10 03:09:39,781 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) [2022-02-10 03:09:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3558 transitions. [2022-02-10 03:09:39,783 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3558 transitions. Word has length 17 [2022-02-10 03:09:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:39,783 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 3558 transitions. [2022-02-10 03:09:39,783 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) [2022-02-10 03:09:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3558 transitions. [2022-02-10 03:09:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:39,784 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:39,784 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:39,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:39,984 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 [2022-02-10 03:09:39,984 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:39,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1942506373, now seen corresponding path program 365 times [2022-02-10 03:09:39,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:39,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310849725] [2022-02-10 03:09:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:39,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:40,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:40,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310849725] [2022-02-10 03:09:40,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310849725] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:40,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077336001] [2022-02-10 03:09:40,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:40,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:40,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:40,058 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) [2022-02-10 03:09:40,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-02-10 03:09:40,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:09:40,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:40,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:40,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:40,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:40,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:40,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:40,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:40,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:40,313 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:40,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:40,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:40,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077336001] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:40,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:40,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:09:40,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457889859] [2022-02-10 03:09:40,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:40,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:40,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:40,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:40,337 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) [2022-02-10 03:09:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:40,629 INFO L93 Difference]: Finished difference Result 1388 states and 3815 transitions. [2022-02-10 03:09:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:09:40,630 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 [2022-02-10 03:09:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:40,632 INFO L225 Difference]: With dead ends: 1388 [2022-02-10 03:09:40,632 INFO L226 Difference]: Without dead ends: 1387 [2022-02-10 03:09:40,645 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 [2022-02-10 03:09:40,645 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:40,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 90 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-02-10 03:09:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1251. [2022-02-10 03:09:40,657 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) [2022-02-10 03:09:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 3601 transitions. [2022-02-10 03:09:40,659 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 3601 transitions. Word has length 17 [2022-02-10 03:09:40,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:40,659 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 3601 transitions. [2022-02-10 03:09:40,659 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) [2022-02-10 03:09:40,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 3601 transitions. [2022-02-10 03:09:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:40,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:40,661 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:40,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:40,872 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 [2022-02-10 03:09:40,872 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:40,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:40,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1140890145, now seen corresponding path program 366 times [2022-02-10 03:09:40,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:40,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443769310] [2022-02-10 03:09:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:40,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:40,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:40,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443769310] [2022-02-10 03:09:40,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443769310] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:40,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014792517] [2022-02-10 03:09:40,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:40,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:40,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:40,954 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) [2022-02-10 03:09:40,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-02-10 03:09:40,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:09:40,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:40,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:40,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:41,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:41,088 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 43 treesize of output 35 [2022-02-10 03:09:41,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:41,090 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 35 treesize of output 27 [2022-02-10 03:09:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:41,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:41,230 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:41,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:41,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:41,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014792517] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:41,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:41,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 19 [2022-02-10 03:09:41,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708993819] [2022-02-10 03:09:41,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:41,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:41,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:41,258 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) [2022-02-10 03:09:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:41,758 INFO L93 Difference]: Finished difference Result 1358 states and 3778 transitions. [2022-02-10 03:09:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:09:41,758 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 [2022-02-10 03:09:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:41,761 INFO L225 Difference]: With dead ends: 1358 [2022-02-10 03:09:41,761 INFO L226 Difference]: Without dead ends: 1355 [2022-02-10 03:09:41,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:09:41,761 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 102 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:09:41,761 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] [2022-02-10 03:09:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-02-10 03:09:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1267. [2022-02-10 03:09:41,774 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) [2022-02-10 03:09:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 3657 transitions. [2022-02-10 03:09:41,776 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 3657 transitions. Word has length 17 [2022-02-10 03:09:41,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:41,776 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 3657 transitions. [2022-02-10 03:09:41,776 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) [2022-02-10 03:09:41,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 3657 transitions. [2022-02-10 03:09:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:41,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:41,782 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:41,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:41,995 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 [2022-02-10 03:09:41,995 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash 577453561, now seen corresponding path program 367 times [2022-02-10 03:09:41,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:41,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643134223] [2022-02-10 03:09:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:41,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:42,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:42,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643134223] [2022-02-10 03:09:42,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643134223] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:42,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229642113] [2022-02-10 03:09:42,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:42,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:42,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:42,072 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) [2022-02-10 03:09:42,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-02-10 03:09:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:42,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:42,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:42,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:42,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:42,203 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 35 treesize of output 27 [2022-02-10 03:09:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:42,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:42,320 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:42,320 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:09:42,322 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 21 treesize of output 13 [2022-02-10 03:09:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:42,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229642113] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:42,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:42,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:09:42,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055540446] [2022-02-10 03:09:42,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:42,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:42,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:42,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:42,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:42,349 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) [2022-02-10 03:09:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:42,681 INFO L93 Difference]: Finished difference Result 1338 states and 3735 transitions. [2022-02-10 03:09:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:09:42,682 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 [2022-02-10 03:09:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:42,684 INFO L225 Difference]: With dead ends: 1338 [2022-02-10 03:09:42,684 INFO L226 Difference]: Without dead ends: 1338 [2022-02-10 03:09:42,684 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 [2022-02-10 03:09:42,684 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:42,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 134 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-02-10 03:09:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1242. [2022-02-10 03:09:42,696 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) [2022-02-10 03:09:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 3557 transitions. [2022-02-10 03:09:42,698 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 3557 transitions. Word has length 17 [2022-02-10 03:09:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:42,698 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 3557 transitions. [2022-02-10 03:09:42,698 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) [2022-02-10 03:09:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 3557 transitions. [2022-02-10 03:09:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:42,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:42,700 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:42,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-02-10 03:09:42,900 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 [2022-02-10 03:09:42,900 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1824390183, now seen corresponding path program 368 times [2022-02-10 03:09:42,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:42,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3793884] [2022-02-10 03:09:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:42,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:42,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:42,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3793884] [2022-02-10 03:09:42,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3793884] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:42,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505379296] [2022-02-10 03:09:42,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:42,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:42,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:42,976 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) [2022-02-10 03:09:42,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-02-10 03:09:42,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:42,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:42,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:43,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:43,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:43,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:43,108 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 35 treesize of output 27 [2022-02-10 03:09:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:43,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:43,236 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:43,236 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:09:43,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:43,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505379296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:43,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:43,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:09:43,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133076880] [2022-02-10 03:09:43,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:43,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:43,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:43,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:43,264 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) [2022-02-10 03:09:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:43,695 INFO L93 Difference]: Finished difference Result 1368 states and 3772 transitions. [2022-02-10 03:09:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:09:43,695 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 [2022-02-10 03:09:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:43,698 INFO L225 Difference]: With dead ends: 1368 [2022-02-10 03:09:43,698 INFO L226 Difference]: Without dead ends: 1366 [2022-02-10 03:09:43,698 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 [2022-02-10 03:09:43,698 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 [2022-02-10 03:09:43,698 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] [2022-02-10 03:09:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2022-02-10 03:09:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1262. [2022-02-10 03:09:43,710 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) [2022-02-10 03:09:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3621 transitions. [2022-02-10 03:09:43,712 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3621 transitions. Word has length 17 [2022-02-10 03:09:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:43,712 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 3621 transitions. [2022-02-10 03:09:43,712 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) [2022-02-10 03:09:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3621 transitions. [2022-02-10 03:09:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:43,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:43,714 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:43,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Ended with exit code 0 [2022-02-10 03:09:43,929 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 [2022-02-10 03:09:43,929 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:43,930 INFO L85 PathProgramCache]: Analyzing trace with hash -95342849, now seen corresponding path program 369 times [2022-02-10 03:09:43,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:43,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534739763] [2022-02-10 03:09:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:43,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:44,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:44,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534739763] [2022-02-10 03:09:44,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534739763] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:44,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111217612] [2022-02-10 03:09:44,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:44,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:44,003 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) [2022-02-10 03:09:44,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-02-10 03:09:44,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:09:44,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:44,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:44,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:44,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:44,172 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 39 treesize of output 33 [2022-02-10 03:09:44,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:44,173 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 33 treesize of output 27 [2022-02-10 03:09:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:44,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:44,263 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-10 03:09:44,264 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-02-10 03:09:44,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:09:44,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111217612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:44,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:44,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-02-10 03:09:44,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922091905] [2022-02-10 03:09:44,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:44,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:44,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:44,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:44,292 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) [2022-02-10 03:09:44,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:44,630 INFO L93 Difference]: Finished difference Result 1313 states and 3681 transitions. [2022-02-10 03:09:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:09:44,630 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 [2022-02-10 03:09:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:44,632 INFO L225 Difference]: With dead ends: 1313 [2022-02-10 03:09:44,633 INFO L226 Difference]: Without dead ends: 1309 [2022-02-10 03:09:44,633 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 [2022-02-10 03:09:44,633 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 [2022-02-10 03:09:44,633 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] [2022-02-10 03:09:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-02-10 03:09:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1262. [2022-02-10 03:09:44,644 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) [2022-02-10 03:09:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3612 transitions. [2022-02-10 03:09:44,646 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3612 transitions. Word has length 17 [2022-02-10 03:09:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:44,646 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 3612 transitions. [2022-02-10 03:09:44,646 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) [2022-02-10 03:09:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3612 transitions. [2022-02-10 03:09:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:44,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:44,647 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:44,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Ended with exit code 0 [2022-02-10 03:09:44,851 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 [2022-02-10 03:09:44,851 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:44,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:44,851 INFO L85 PathProgramCache]: Analyzing trace with hash 842049719, now seen corresponding path program 370 times [2022-02-10 03:09:44,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:44,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438969919] [2022-02-10 03:09:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:44,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:44,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:44,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438969919] [2022-02-10 03:09:44,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438969919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:44,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369881633] [2022-02-10 03:09:44,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:44,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:44,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:44,955 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) [2022-02-10 03:09:44,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-02-10 03:09:44,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:44,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:45,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:45,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:45,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:45,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:45,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:45,301 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:45,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:45,303 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 21 treesize of output 13 [2022-02-10 03:09:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:45,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369881633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:45,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:45,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-10 03:09:45,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111540777] [2022-02-10 03:09:45,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:45,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:09:45,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:45,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:09:45,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:45,326 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) [2022-02-10 03:09:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:45,655 INFO L93 Difference]: Finished difference Result 1422 states and 3900 transitions. [2022-02-10 03:09:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:09:45,656 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 [2022-02-10 03:09:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:45,658 INFO L225 Difference]: With dead ends: 1422 [2022-02-10 03:09:45,658 INFO L226 Difference]: Without dead ends: 1421 [2022-02-10 03:09:45,658 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 [2022-02-10 03:09:45,658 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 [2022-02-10 03:09:45,659 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] [2022-02-10 03:09:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2022-02-10 03:09:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1286. [2022-02-10 03:09:45,671 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) [2022-02-10 03:09:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 3699 transitions. [2022-02-10 03:09:45,673 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 3699 transitions. Word has length 17 [2022-02-10 03:09:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:45,673 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 3699 transitions. [2022-02-10 03:09:45,673 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) [2022-02-10 03:09:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 3699 transitions. [2022-02-10 03:09:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:45,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:45,674 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:45,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Ended with exit code 0 [2022-02-10 03:09:45,875 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 [2022-02-10 03:09:45,875 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:45,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1643665947, now seen corresponding path program 371 times [2022-02-10 03:09:45,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:45,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467390571] [2022-02-10 03:09:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:45,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:45,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:45,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467390571] [2022-02-10 03:09:45,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467390571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:45,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747837815] [2022-02-10 03:09:45,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:45,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:45,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:45,966 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) [2022-02-10 03:09:45,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-02-10 03:09:45,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:09:45,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:46,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:46,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:46,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:46,136 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 35 treesize of output 27 [2022-02-10 03:09:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:46,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:46,322 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:46,323 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 30 treesize of output 27 [2022-02-10 03:09:46,324 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 13 treesize of output 9 [2022-02-10 03:09:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:46,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747837815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:46,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:46,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:09:46,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831948541] [2022-02-10 03:09:46,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:46,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:46,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:46,342 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) [2022-02-10 03:09:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:47,539 INFO L93 Difference]: Finished difference Result 1447 states and 3955 transitions. [2022-02-10 03:09:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-10 03:09:47,539 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 [2022-02-10 03:09:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:47,541 INFO L225 Difference]: With dead ends: 1447 [2022-02-10 03:09:47,541 INFO L226 Difference]: Without dead ends: 1440 [2022-02-10 03:09:47,541 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 [2022-02-10 03:09:47,541 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 [2022-02-10 03:09:47,542 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] [2022-02-10 03:09:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2022-02-10 03:09:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1319. [2022-02-10 03:09:47,554 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) [2022-02-10 03:09:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 3802 transitions. [2022-02-10 03:09:47,556 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 3802 transitions. Word has length 17 [2022-02-10 03:09:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:47,556 INFO L470 AbstractCegarLoop]: Abstraction has 1319 states and 3802 transitions. [2022-02-10 03:09:47,556 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) [2022-02-10 03:09:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 3802 transitions. [2022-02-10 03:09:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:47,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:47,557 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:47,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Ended with exit code 0 [2022-02-10 03:09:47,758 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 [2022-02-10 03:09:47,758 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:47,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:47,758 INFO L85 PathProgramCache]: Analyzing trace with hash -932957643, now seen corresponding path program 372 times [2022-02-10 03:09:47,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:47,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661730881] [2022-02-10 03:09:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:47,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:47,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:47,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661730881] [2022-02-10 03:09:47,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661730881] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:47,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069879673] [2022-02-10 03:09:47,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:47,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:47,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:47,869 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) [2022-02-10 03:09:47,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-02-10 03:09:47,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:09:47,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:48,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:48,039 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 43 treesize of output 35 [2022-02-10 03:09:48,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:48,041 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 35 treesize of output 27 [2022-02-10 03:09:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:48,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:48,228 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:48,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:48,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:48,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069879673] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:48,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:48,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-10 03:09:48,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454227770] [2022-02-10 03:09:48,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:48,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:09:48,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:09:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:48,247 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) [2022-02-10 03:09:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:49,163 INFO L93 Difference]: Finished difference Result 1445 states and 3941 transitions. [2022-02-10 03:09:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:09:49,163 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 [2022-02-10 03:09:49,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:49,165 INFO L225 Difference]: With dead ends: 1445 [2022-02-10 03:09:49,165 INFO L226 Difference]: Without dead ends: 1444 [2022-02-10 03:09:49,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:09:49,166 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:49,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 90 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:09:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-02-10 03:09:49,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1285. [2022-02-10 03:09:49,177 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) [2022-02-10 03:09:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3672 transitions. [2022-02-10 03:09:49,179 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3672 transitions. Word has length 17 [2022-02-10 03:09:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:49,180 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 3672 transitions. [2022-02-10 03:09:49,180 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) [2022-02-10 03:09:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3672 transitions. [2022-02-10 03:09:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:49,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:49,181 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:49,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Ended with exit code 0 [2022-02-10 03:09:49,381 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 [2022-02-10 03:09:49,381 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:49,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:49,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1651396345, now seen corresponding path program 373 times [2022-02-10 03:09:49,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:49,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986385434] [2022-02-10 03:09:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:49,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:49,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:49,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986385434] [2022-02-10 03:09:49,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986385434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:49,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982425678] [2022-02-10 03:09:49,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:49,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:49,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:49,471 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) [2022-02-10 03:09:49,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-02-10 03:09:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:49,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:49,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:49,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:49,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:49,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:49,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:49,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:49,673 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 8 treesize of output 1 [2022-02-10 03:09:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:49,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:49,805 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:49,805 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:09:49,807 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 13 treesize of output 9 [2022-02-10 03:09:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:49,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982425678] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:49,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:49,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:09:49,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062405112] [2022-02-10 03:09:49,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:49,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:49,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:49,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:49,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:49,824 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) [2022-02-10 03:09:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:50,937 INFO L93 Difference]: Finished difference Result 1407 states and 3857 transitions. [2022-02-10 03:09:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-10 03:09:50,938 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 [2022-02-10 03:09:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:50,939 INFO L225 Difference]: With dead ends: 1407 [2022-02-10 03:09:50,939 INFO L226 Difference]: Without dead ends: 1407 [2022-02-10 03:09:50,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2022-02-10 03:09:50,940 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-10 03:09:50,940 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] [2022-02-10 03:09:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-02-10 03:09:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1257. [2022-02-10 03:09:50,956 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) [2022-02-10 03:09:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3573 transitions. [2022-02-10 03:09:50,958 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3573 transitions. Word has length 17 [2022-02-10 03:09:50,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:50,958 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 3573 transitions. [2022-02-10 03:09:50,958 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) [2022-02-10 03:09:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3573 transitions. [2022-02-10 03:09:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:50,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:50,959 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:50,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-02-10 03:09:51,160 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 [2022-02-10 03:09:51,160 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash 161991349, now seen corresponding path program 374 times [2022-02-10 03:09:51,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:51,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034697518] [2022-02-10 03:09:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:51,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:51,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:51,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034697518] [2022-02-10 03:09:51,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034697518] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:51,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721053981] [2022-02-10 03:09:51,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:51,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:51,250 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) [2022-02-10 03:09:51,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-02-10 03:09:51,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:51,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:51,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:51,433 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:09:51,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:51,435 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 7 treesize of output 1 [2022-02-10 03:09:51,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:51,438 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 8 treesize of output 1 [2022-02-10 03:09:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:51,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:51,560 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:51,560 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-02-10 03:09:51,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:09:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:51,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721053981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:51,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:51,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:09:51,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746497150] [2022-02-10 03:09:51,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:51,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:51,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:51,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:51,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:51,579 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) [2022-02-10 03:09:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:52,759 INFO L93 Difference]: Finished difference Result 1369 states and 3780 transitions. [2022-02-10 03:09:52,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-10 03:09:52,759 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 [2022-02-10 03:09:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:52,760 INFO L225 Difference]: With dead ends: 1369 [2022-02-10 03:09:52,760 INFO L226 Difference]: Without dead ends: 1369 [2022-02-10 03:09:52,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=436, Invalid=2644, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 03:09:52,761 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:52,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 54 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:09:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-02-10 03:09:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1240. [2022-02-10 03:09:52,772 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) [2022-02-10 03:09:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3525 transitions. [2022-02-10 03:09:52,774 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3525 transitions. Word has length 17 [2022-02-10 03:09:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:52,774 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 3525 transitions. [2022-02-10 03:09:52,774 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) [2022-02-10 03:09:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3525 transitions. [2022-02-10 03:09:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:09:52,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:52,775 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:52,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:52,990 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 [2022-02-10 03:09:52,990 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1235076729, now seen corresponding path program 375 times [2022-02-10 03:09:52,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:52,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147895472] [2022-02-10 03:09:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:52,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:53,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:53,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147895472] [2022-02-10 03:09:53,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147895472] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:53,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075041985] [2022-02-10 03:09:53,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:53,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:53,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:53,083 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) [2022-02-10 03:09:53,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-02-10 03:09:53,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:09:53,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:53,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:09:53,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:53,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:53,260 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 [2022-02-10 03:09:53,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:53,262 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 7 treesize of output 1 [2022-02-10 03:09:53,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:53,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:53,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:53,371 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-02-10 03:09:53,372 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 30 treesize of output 27 [2022-02-10 03:09:53,373 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 13 treesize of output 9 [2022-02-10 03:09:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:53,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075041985] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:53,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:53,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-10 03:09:53,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208308491] [2022-02-10 03:09:53,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:53,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:53,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:53,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:53,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:53,391 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) [2022-02-10 03:09:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:53,655 INFO L93 Difference]: Finished difference Result 1287 states and 3602 transitions. [2022-02-10 03:09:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:09:53,655 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 [2022-02-10 03:09:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:53,656 INFO L225 Difference]: With dead ends: 1287 [2022-02-10 03:09:53,656 INFO L226 Difference]: Without dead ends: 1287 [2022-02-10 03:09:53,656 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 [2022-02-10 03:09:53,657 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 [2022-02-10 03:09:53,657 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] [2022-02-10 03:09:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-02-10 03:09:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1222. [2022-02-10 03:09:53,667 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) [2022-02-10 03:09:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3474 transitions. [2022-02-10 03:09:53,669 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3474 transitions. Word has length 17 [2022-02-10 03:09:53,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:53,669 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 3474 transitions. [2022-02-10 03:09:53,669 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) [2022-02-10 03:09:53,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3474 transitions. [2022-02-10 03:09:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:09:53,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:53,671 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:53,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-02-10 03:09:53,871 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 [2022-02-10 03:09:53,871 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:53,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:53,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1071632419, now seen corresponding path program 376 times [2022-02-10 03:09:53,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:53,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090617850] [2022-02-10 03:09:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:53,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:54,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:54,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090617850] [2022-02-10 03:09:54,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090617850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:54,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358241190] [2022-02-10 03:09:54,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:54,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:54,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:54,258 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) [2022-02-10 03:09:54,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-02-10 03:09:54,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:54,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:54,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:09:54,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:55,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:55,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:55,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:55,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:55,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:55,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:55,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:55,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:55,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:55,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:55,106 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 [2022-02-10 03:09:55,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:55,108 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 [2022-02-10 03:09:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:55,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:56,375 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:09:56,375 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 [2022-02-10 03:09:56,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:56,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:56,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:56,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:56,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:56,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:56,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:56,436 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 [2022-02-10 03:09:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:57,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358241190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:57,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:57,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-10 03:09:57,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707798660] [2022-02-10 03:09:57,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:57,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:09:57,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:09:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:09:57,149 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) [2022-02-10 03:09:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:58,260 INFO L93 Difference]: Finished difference Result 1638 states and 4505 transitions. [2022-02-10 03:09:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:09:58,260 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 [2022-02-10 03:09:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:58,262 INFO L225 Difference]: With dead ends: 1638 [2022-02-10 03:09:58,262 INFO L226 Difference]: Without dead ends: 1635 [2022-02-10 03:09:58,262 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 [2022-02-10 03:09:58,263 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 [2022-02-10 03:09:58,263 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] [2022-02-10 03:09:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-02-10 03:09:58,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1225. [2022-02-10 03:09:58,274 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) [2022-02-10 03:09:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 3479 transitions. [2022-02-10 03:09:58,276 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 3479 transitions. Word has length 18 [2022-02-10 03:09:58,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:58,276 INFO L470 AbstractCegarLoop]: Abstraction has 1225 states and 3479 transitions. [2022-02-10 03:09:58,276 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) [2022-02-10 03:09:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 3479 transitions. [2022-02-10 03:09:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:09:58,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:58,277 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:58,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Ended with exit code 0 [2022-02-10 03:09:58,477 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 [2022-02-10 03:09:58,478 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:09:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:58,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1601118559, now seen corresponding path program 377 times [2022-02-10 03:09:58,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:58,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356665681] [2022-02-10 03:09:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:58,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:58,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:58,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356665681] [2022-02-10 03:09:58,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356665681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:58,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220778941] [2022-02-10 03:09:58,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:58,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:58,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:58,991 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) [2022-02-10 03:09:58,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-02-10 03:09:59,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:09:59,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:59,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:09:59,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:59,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:59,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:59,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:59,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:59,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:59,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:59,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:09:59,831 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:09:59,831 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 [2022-02-10 03:09:59,837 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:09:59,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:09:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:09:59,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:01,080 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:10:01,080 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 [2022-02-10 03:10:01,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:01,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:01,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:01,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:01,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:01,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:01,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:01,143 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 [2022-02-10 03:10:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:01,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220778941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:01,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:01,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-02-10 03:10:01,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246051567] [2022-02-10 03:10:01,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:01,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:10:01,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:01,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:10:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:10:01,843 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) [2022-02-10 03:10:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:02,727 INFO L93 Difference]: Finished difference Result 1626 states and 4491 transitions. [2022-02-10 03:10:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:10:02,728 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 [2022-02-10 03:10:02,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:02,730 INFO L225 Difference]: With dead ends: 1626 [2022-02-10 03:10:02,730 INFO L226 Difference]: Without dead ends: 1623 [2022-02-10 03:10:02,730 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 [2022-02-10 03:10:02,730 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-10 03:10:02,730 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] [2022-02-10 03:10:02,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-02-10 03:10:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1229. [2022-02-10 03:10:02,742 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) [2022-02-10 03:10:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3491 transitions. [2022-02-10 03:10:02,744 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3491 transitions. Word has length 18 [2022-02-10 03:10:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:02,744 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 3491 transitions. [2022-02-10 03:10:02,744 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) [2022-02-10 03:10:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3491 transitions. [2022-02-10 03:10:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:10:02,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:02,745 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:02,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Ended with exit code 0 [2022-02-10 03:10:02,945 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 [2022-02-10 03:10:02,946 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:10:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:02,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1086327551, now seen corresponding path program 378 times [2022-02-10 03:10:02,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:02,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544769231] [2022-02-10 03:10:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:02,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:03,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:03,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544769231] [2022-02-10 03:10:03,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544769231] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:03,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967038201] [2022-02-10 03:10:03,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:03,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:03,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:03,382 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) [2022-02-10 03:10:03,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-02-10 03:10:03,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:10:03,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:03,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:10:03,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:04,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:04,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:04,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:04,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:04,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:04,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:04,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:04,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:04,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:04,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:04,226 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 [2022-02-10 03:10:04,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:04,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:10:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:04,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:05,551 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:10:05,552 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 [2022-02-10 03:10:05,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:05,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:05,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:05,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:05,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:05,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:05,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:05,619 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 [2022-02-10 03:10:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:06,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967038201] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:06,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:06,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-10 03:10:06,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493524023] [2022-02-10 03:10:06,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:06,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:10:06,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:06,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:10:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:10:06,362 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) [2022-02-10 03:10:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:08,859 INFO L93 Difference]: Finished difference Result 1665 states and 4537 transitions. [2022-02-10 03:10:08,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 03:10:08,859 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 [2022-02-10 03:10:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:08,861 INFO L225 Difference]: With dead ends: 1665 [2022-02-10 03:10:08,861 INFO L226 Difference]: Without dead ends: 1662 [2022-02-10 03:10:08,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=243, Invalid=2727, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:10:08,862 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:08,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 23 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 863 Invalid, 0 Unknown, 355 Unchecked, 0.6s Time] [2022-02-10 03:10:08,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-02-10 03:10:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1228. [2022-02-10 03:10:08,874 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) [2022-02-10 03:10:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3488 transitions. [2022-02-10 03:10:08,876 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3488 transitions. Word has length 18 [2022-02-10 03:10:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:08,876 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 3488 transitions. [2022-02-10 03:10:08,876 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) [2022-02-10 03:10:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3488 transitions. [2022-02-10 03:10:08,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:10:08,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:08,877 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:08,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Ended with exit code 0 [2022-02-10 03:10:09,078 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 [2022-02-10 03:10:09,078 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:10:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash 642719783, now seen corresponding path program 379 times [2022-02-10 03:10:09,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:09,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792172831] [2022-02-10 03:10:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:09,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:09,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:09,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792172831] [2022-02-10 03:10:09,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792172831] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:09,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053586263] [2022-02-10 03:10:09,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:09,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:09,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:09,549 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) [2022-02-10 03:10:09,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-02-10 03:10:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:09,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:10:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:10,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:10,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:10,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:10,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:10,396 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 [2022-02-10 03:10:10,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:10,398 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:10:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:10,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:11,659 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:10:11,659 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 [2022-02-10 03:10:11,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:11,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:11,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:11,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:11,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:11,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:11,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:11,720 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 [2022-02-10 03:10:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:12,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053586263] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:12,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:12,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-10 03:10:12,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915111454] [2022-02-10 03:10:12,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:12,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:10:12,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:12,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:10:12,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:10:12,692 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) [2022-02-10 03:10:14,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:14,990 INFO L93 Difference]: Finished difference Result 1800 states and 4915 transitions. [2022-02-10 03:10:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:10:14,990 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 [2022-02-10 03:10:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:14,992 INFO L225 Difference]: With dead ends: 1800 [2022-02-10 03:10:14,992 INFO L226 Difference]: Without dead ends: 1797 [2022-02-10 03:10:14,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=227, Invalid=2425, Unknown=0, NotChecked=0, Total=2652 [2022-02-10 03:10:14,993 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:14,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 24 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 743 Invalid, 0 Unknown, 167 Unchecked, 0.5s Time] [2022-02-10 03:10:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-02-10 03:10:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1228. [2022-02-10 03:10:15,005 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) [2022-02-10 03:10:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3488 transitions. [2022-02-10 03:10:15,007 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3488 transitions. Word has length 18 [2022-02-10 03:10:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:15,007 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 3488 transitions. [2022-02-10 03:10:15,008 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) [2022-02-10 03:10:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3488 transitions. [2022-02-10 03:10:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:10:15,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:15,009 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:15,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Forceful destruction successful, exit code 0 [2022-02-10 03:10:15,209 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 [2022-02-10 03:10:15,209 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:10:15,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:15,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1591387711, now seen corresponding path program 380 times [2022-02-10 03:10:15,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:15,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857680091] [2022-02-10 03:10:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:15,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:15,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:15,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857680091] [2022-02-10 03:10:15,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857680091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:15,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333512872] [2022-02-10 03:10:15,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:15,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:15,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:15,642 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) [2022-02-10 03:10:15,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-02-10 03:10:15,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:15,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:15,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-10 03:10:15,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:16,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:16,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:16,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:16,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:16,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:16,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:16,593 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 [2022-02-10 03:10:16,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:16,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:10:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:16,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:17,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:17,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:17,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:17,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:17,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:17,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:18,049 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-10 03:10:18,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 [2022-02-10 03:10:18,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:18,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:18,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:18,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:18,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:18,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:18,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:18,113 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 [2022-02-10 03:10:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:18,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333512872] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:18,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:18,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-02-10 03:10:18,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954157489] [2022-02-10 03:10:18,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:18,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-10 03:10:18,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-10 03:10:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:10:18,880 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) [2022-02-10 03:10:25,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:25,906 INFO L93 Difference]: Finished difference Result 1894 states and 5152 transitions. [2022-02-10 03:10:25,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-10 03:10:25,906 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 [2022-02-10 03:10:25,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:25,909 INFO L225 Difference]: With dead ends: 1894 [2022-02-10 03:10:25,909 INFO L226 Difference]: Without dead ends: 1885 [2022-02-10 03:10:25,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=442, Invalid=4250, Unknown=0, NotChecked=0, Total=4692 [2022-02-10 03:10:25,909 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:25,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 57 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1255 Invalid, 0 Unknown, 189 Unchecked, 0.8s Time] [2022-02-10 03:10:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2022-02-10 03:10:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1231. [2022-02-10 03:10:25,922 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) [2022-02-10 03:10:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3495 transitions. [2022-02-10 03:10:25,924 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3495 transitions. Word has length 18 [2022-02-10 03:10:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:25,924 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 3495 transitions. [2022-02-10 03:10:25,924 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) [2022-02-10 03:10:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3495 transitions. [2022-02-10 03:10:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:10:25,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:25,925 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:25,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Ended with exit code 0 [2022-02-10 03:10:26,125 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 [2022-02-10 03:10:26,125 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:10:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash 734866147, now seen corresponding path program 381 times [2022-02-10 03:10:26,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:26,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789039502] [2022-02-10 03:10:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:26,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:26,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:26,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789039502] [2022-02-10 03:10:26,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789039502] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:26,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355870582] [2022-02-10 03:10:26,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:10:26,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:26,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:26,397 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) [2022-02-10 03:10:26,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-02-10 03:10:26,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:10:26,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:26,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:10:26,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:27,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:27,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:27,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:27,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:27,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:27,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:27,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:27,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:27,135 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 [2022-02-10 03:10:27,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:27,137 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 60 treesize of output 48 [2022-02-10 03:10:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:27,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:28,570 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:10:28,570 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 [2022-02-10 03:10:28,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:28,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:28,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:28,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:28,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:28,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:28,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:28,628 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 [2022-02-10 03:10:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:29,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355870582] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:29,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:29,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-10 03:10:29,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901393518] [2022-02-10 03:10:29,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:29,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:10:29,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:29,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:10:29,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:10:29,008 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) [2022-02-10 03:10:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:31,538 INFO L93 Difference]: Finished difference Result 1585 states and 4309 transitions. [2022-02-10 03:10:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:10:31,538 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 [2022-02-10 03:10:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:31,540 INFO L225 Difference]: With dead ends: 1585 [2022-02-10 03:10:31,540 INFO L226 Difference]: Without dead ends: 1580 [2022-02-10 03:10:31,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=285, Invalid=2685, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:10:31,540 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:31,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 95 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-10 03:10:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-02-10 03:10:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1229. [2022-02-10 03:10:31,552 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) [2022-02-10 03:10:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3508 transitions. [2022-02-10 03:10:31,554 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3508 transitions. Word has length 18 [2022-02-10 03:10:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:31,554 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 3508 transitions. [2022-02-10 03:10:31,555 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) [2022-02-10 03:10:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3508 transitions. [2022-02-10 03:10:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:10:31,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:31,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:31,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Ended with exit code 0 [2022-02-10 03:10:31,756 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 [2022-02-10 03:10:31,756 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:10:31,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash 742596545, now seen corresponding path program 382 times [2022-02-10 03:10:31,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:31,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222040910] [2022-02-10 03:10:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:31,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:32,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:32,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222040910] [2022-02-10 03:10:32,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222040910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:32,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523036285] [2022-02-10 03:10:32,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:10:32,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:32,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:32,159 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) [2022-02-10 03:10:32,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-02-10 03:10:32,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:10:32,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:32,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:10:32,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:32,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:32,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:32,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:32,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:32,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:32,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:32,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:32,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:33,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:33,004 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:10:33,004 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 [2022-02-10 03:10:33,009 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:10:33,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:10:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:33,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:34,493 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:10:34,493 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 [2022-02-10 03:10:34,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:34,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:34,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:34,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:34,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:34,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:34,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:34,553 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 [2022-02-10 03:10:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:35,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523036285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:35,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:35,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-02-10 03:10:35,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851712578] [2022-02-10 03:10:35,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:35,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:10:35,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:35,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:10:35,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:10:35,149 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) [2022-02-10 03:10:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:38,496 INFO L93 Difference]: Finished difference Result 1586 states and 4319 transitions. [2022-02-10 03:10:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-10 03:10:38,496 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 [2022-02-10 03:10:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:38,498 INFO L225 Difference]: With dead ends: 1586 [2022-02-10 03:10:38,498 INFO L226 Difference]: Without dead ends: 1575 [2022-02-10 03:10:38,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=351, Invalid=3431, Unknown=0, NotChecked=0, Total=3782 [2022-02-10 03:10:38,498 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 [2022-02-10 03:10:38,498 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] [2022-02-10 03:10:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-02-10 03:10:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1283. [2022-02-10 03:10:38,509 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) [2022-02-10 03:10:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3663 transitions. [2022-02-10 03:10:38,511 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3663 transitions. Word has length 18 [2022-02-10 03:10:38,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:38,511 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 3663 transitions. [2022-02-10 03:10:38,511 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) [2022-02-10 03:10:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3663 transitions. [2022-02-10 03:10:38,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:10:38,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:38,513 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:38,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Ended with exit code 0 [2022-02-10 03:10:38,713 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 [2022-02-10 03:10:38,713 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:10:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash -746808451, now seen corresponding path program 383 times [2022-02-10 03:10:38,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:38,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541988903] [2022-02-10 03:10:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:38,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:39,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:39,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541988903] [2022-02-10 03:10:39,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541988903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:39,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917140809] [2022-02-10 03:10:39,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:10:39,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:39,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:39,256 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) [2022-02-10 03:10:39,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-02-10 03:10:39,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:10:39,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:39,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:10:39,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:40,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:40,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:40,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:40,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:40,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:40,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:40,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:40,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:40,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:40,072 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:10:40,072 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 [2022-02-10 03:10:40,084 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:10:40,084 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-10 03:10:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:40,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:41,565 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:10:41,565 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 [2022-02-10 03:10:41,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:41,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:41,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:41,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:41,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:41,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:41,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:41,628 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 [2022-02-10 03:10:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:42,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917140809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:42,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:42,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-10 03:10:42,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569723493] [2022-02-10 03:10:42,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:42,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:10:42,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:42,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:10:42,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:10:42,397 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) [2022-02-10 03:10:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:45,885 INFO L93 Difference]: Finished difference Result 1565 states and 4316 transitions. [2022-02-10 03:10:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-10 03:10:45,885 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 [2022-02-10 03:10:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:45,887 INFO L225 Difference]: With dead ends: 1565 [2022-02-10 03:10:45,887 INFO L226 Difference]: Without dead ends: 1552 [2022-02-10 03:10:45,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=312, Invalid=2994, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:10:45,887 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:45,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 47 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1117 Invalid, 0 Unknown, 132 Unchecked, 0.7s Time] [2022-02-10 03:10:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2022-02-10 03:10:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1301. [2022-02-10 03:10:45,898 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) [2022-02-10 03:10:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 3717 transitions. [2022-02-10 03:10:45,900 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 3717 transitions. Word has length 18 [2022-02-10 03:10:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:45,900 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 3717 transitions. [2022-02-10 03:10:45,900 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) [2022-02-10 03:10:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 3717 transitions. [2022-02-10 03:10:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:10:45,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:45,902 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:45,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Ended with exit code 0 [2022-02-10 03:10:46,102 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 [2022-02-10 03:10:46,102 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:10:46,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:46,102 INFO L85 PathProgramCache]: Analyzing trace with hash 860712735, now seen corresponding path program 384 times [2022-02-10 03:10:46,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:46,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442803796] [2022-02-10 03:10:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:46,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:46,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:46,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442803796] [2022-02-10 03:10:46,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442803796] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:46,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835255748] [2022-02-10 03:10:46,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:46,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:46,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:46,383 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) [2022-02-10 03:10:46,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-02-10 03:10:46,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:10:46,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:46,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 56 conjunts are in the unsatisfiable core [2022-02-10 03:10:46,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:47,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:47,207 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 [2022-02-10 03:10:47,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:47,210 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 79 treesize of output 63 [2022-02-10 03:10:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:47,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:48,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,972 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-10 03:10:48,972 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 [2022-02-10 03:10:48,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:49,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:49,036 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 [2022-02-10 03:10:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:50,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835255748] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:50,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:50,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-10 03:10:50,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304728289] [2022-02-10 03:10:50,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:50,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:10:50,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:50,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:10:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:10:50,506 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) [2022-02-10 03:10:54,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:54,509 INFO L93 Difference]: Finished difference Result 1592 states and 4360 transitions. [2022-02-10 03:10:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-10 03:10:54,509 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 [2022-02-10 03:10:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:54,511 INFO L225 Difference]: With dead ends: 1592 [2022-02-10 03:10:54,511 INFO L226 Difference]: Without dead ends: 1579 [2022-02-10 03:10:54,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=422, Invalid=3738, Unknown=0, NotChecked=0, Total=4160 [2022-02-10 03:10:54,511 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 [2022-02-10 03:10:54,511 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] [2022-02-10 03:10:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-02-10 03:10:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1283. [2022-02-10 03:10:54,523 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) [2022-02-10 03:10:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3663 transitions. [2022-02-10 03:10:54,525 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3663 transitions. Word has length 18 [2022-02-10 03:10:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:54,525 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 3663 transitions. [2022-02-10 03:10:54,525 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) [2022-02-10 03:10:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3663 transitions. [2022-02-10 03:10:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:10:54,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:54,526 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:54,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Ended with exit code 0 [2022-02-10 03:10:54,726 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 [2022-02-10 03:10:54,726 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:10:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash 326276929, now seen corresponding path program 385 times [2022-02-10 03:10:54,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:54,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027300808] [2022-02-10 03:10:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:54,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:55,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:55,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027300808] [2022-02-10 03:10:55,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027300808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:55,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155285991] [2022-02-10 03:10:55,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:55,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:55,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:55,180 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) [2022-02-10 03:10:55,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-02-10 03:10:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:55,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:10:55,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:55,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:55,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:55,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:55,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:55,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:55,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:10:55,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:55,961 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 [2022-02-10 03:10:55,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:55,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:10:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:56,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:57,338 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:10:57,338 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 248 treesize of output 252 [2022-02-10 03:10:57,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:57,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:57,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:57,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:57,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:57,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:57,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:57,398 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 [2022-02-10 03:10:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:10:58,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155285991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:58,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:58,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-10 03:10:58,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084346618] [2022-02-10 03:10:58,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:58,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:10:58,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:10:58,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:10:58,013 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) [2022-02-10 03:11:01,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:01,156 INFO L93 Difference]: Finished difference Result 1571 states and 4300 transitions. [2022-02-10 03:11:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:11:01,156 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 [2022-02-10 03:11:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:01,158 INFO L225 Difference]: With dead ends: 1571 [2022-02-10 03:11:01,158 INFO L226 Difference]: Without dead ends: 1559 [2022-02-10 03:11:01,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=256, Invalid=2936, Unknown=0, NotChecked=0, Total=3192 [2022-02-10 03:11:01,171 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:01,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 71 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1279 Invalid, 0 Unknown, 246 Unchecked, 0.8s Time] [2022-02-10 03:11:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-02-10 03:11:01,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1288. [2022-02-10 03:11:01,184 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) [2022-02-10 03:11:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 3679 transitions. [2022-02-10 03:11:01,186 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 3679 transitions. Word has length 18 [2022-02-10 03:11:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:01,186 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 3679 transitions. [2022-02-10 03:11:01,186 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) [2022-02-10 03:11:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 3679 transitions. [2022-02-10 03:11:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:11:01,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:01,188 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:01,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Forceful destruction successful, exit code 0 [2022-02-10 03:11:01,391 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 [2022-02-10 03:11:01,391 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:11:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash -632121847, now seen corresponding path program 386 times [2022-02-10 03:11:01,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:01,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287137266] [2022-02-10 03:11:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:01,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:01,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:01,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287137266] [2022-02-10 03:11:01,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287137266] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:01,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756358324] [2022-02-10 03:11:01,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:11:01,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:01,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:01,642 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) [2022-02-10 03:11:01,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-02-10 03:11:01,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:11:01,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:01,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:11:01,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:02,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:02,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:02,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:02,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:02,432 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 [2022-02-10 03:11:02,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:02,434 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:11:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:02,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:03,796 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:11:03,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 [2022-02-10 03:11:03,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:03,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:03,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:03,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:03,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:03,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:03,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:03,858 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 [2022-02-10 03:11:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:04,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756358324] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:04,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:04,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-10 03:11:04,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424825783] [2022-02-10 03:11:04,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:04,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:11:04,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:04,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:11:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:11:04,655 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) [2022-02-10 03:11:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:05,760 INFO L93 Difference]: Finished difference Result 1567 states and 4309 transitions. [2022-02-10 03:11:05,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:11:05,760 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 [2022-02-10 03:11:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:05,762 INFO L225 Difference]: With dead ends: 1567 [2022-02-10 03:11:05,762 INFO L226 Difference]: Without dead ends: 1559 [2022-02-10 03:11:05,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=1773, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:11:05,762 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 [2022-02-10 03:11:05,762 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] [2022-02-10 03:11:05,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-02-10 03:11:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1293. [2022-02-10 03:11:05,774 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) [2022-02-10 03:11:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3695 transitions. [2022-02-10 03:11:05,776 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3695 transitions. Word has length 18 [2022-02-10 03:11:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:05,776 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 3695 transitions. [2022-02-10 03:11:05,776 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) [2022-02-10 03:11:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3695 transitions. [2022-02-10 03:11:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:11:05,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:05,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:05,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Ended with exit code 0 [2022-02-10 03:11:05,978 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 [2022-02-10 03:11:05,978 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:11:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash -767814659, now seen corresponding path program 387 times [2022-02-10 03:11:05,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:05,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060615227] [2022-02-10 03:11:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:05,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:06,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:06,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060615227] [2022-02-10 03:11:06,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060615227] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:06,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320628253] [2022-02-10 03:11:06,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:11:06,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:06,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:06,421 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) [2022-02-10 03:11:06,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-02-10 03:11:06,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:11:06,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:06,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-10 03:11:06,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:07,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:07,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:07,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:07,283 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:07,283 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 [2022-02-10 03:11:07,289 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:07,290 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 85 treesize of output 72 [2022-02-10 03:11:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:07,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:08,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:08,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:08,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:08,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:08,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:08,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:09,029 INFO L353 Elim1Store]: treesize reduction 113, result has 29.8 percent of original size [2022-02-10 03:11:09,029 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 [2022-02-10 03:11:09,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:09,048 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 [2022-02-10 03:11:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:09,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320628253] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:09,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:09,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-02-10 03:11:09,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456555051] [2022-02-10 03:11:09,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:09,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-10 03:11:09,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:09,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-10 03:11:09,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:11:09,533 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) [2022-02-10 03:11:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:18,244 INFO L93 Difference]: Finished difference Result 3275 states and 9375 transitions. [2022-02-10 03:11:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-10 03:11:18,244 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 [2022-02-10 03:11:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:18,248 INFO L225 Difference]: With dead ends: 3275 [2022-02-10 03:11:18,248 INFO L226 Difference]: Without dead ends: 3266 [2022-02-10 03:11:18,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=534, Invalid=4436, Unknown=0, NotChecked=0, Total=4970 [2022-02-10 03:11:18,249 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 [2022-02-10 03:11:18,249 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] [2022-02-10 03:11:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2022-02-10 03:11:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 1307. [2022-02-10 03:11:18,269 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) [2022-02-10 03:11:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 3739 transitions. [2022-02-10 03:11:18,271 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 3739 transitions. Word has length 18 [2022-02-10 03:11:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:18,271 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 3739 transitions. [2022-02-10 03:11:18,271 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) [2022-02-10 03:11:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 3739 transitions. [2022-02-10 03:11:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:11:18,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:18,273 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:18,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Forceful destruction successful, exit code 0 [2022-02-10 03:11:18,473 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 [2022-02-10 03:11:18,473 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:11:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:18,473 INFO L85 PathProgramCache]: Analyzing trace with hash 334646367, now seen corresponding path program 388 times [2022-02-10 03:11:18,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:18,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946272251] [2022-02-10 03:11:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:18,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:19,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:19,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946272251] [2022-02-10 03:11:19,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946272251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:19,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734682419] [2022-02-10 03:11:19,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:11:19,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:19,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:19,010 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) [2022-02-10 03:11:19,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-02-10 03:11:19,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:11:19,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:19,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 56 conjunts are in the unsatisfiable core [2022-02-10 03:11:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:19,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:19,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:19,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:19,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:19,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:19,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:19,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:19,987 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:19,987 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 [2022-02-10 03:11:19,993 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:19,993 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-10 03:11:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:20,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:21,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:21,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:21,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:21,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:21,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:21,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:22,031 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-10 03:11:22,031 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 [2022-02-10 03:11:22,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:22,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:22,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:22,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:22,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:22,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:22,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:22,100 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 [2022-02-10 03:11:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:23,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734682419] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:23,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:23,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-10 03:11:23,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694775292] [2022-02-10 03:11:23,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:23,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:11:23,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:11:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:11:23,186 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) [2022-02-10 03:11:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:25,650 INFO L93 Difference]: Finished difference Result 1588 states and 4351 transitions. [2022-02-10 03:11:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:11:25,650 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 [2022-02-10 03:11:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:25,652 INFO L225 Difference]: With dead ends: 1588 [2022-02-10 03:11:25,652 INFO L226 Difference]: Without dead ends: 1582 [2022-02-10 03:11:25,653 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 [2022-02-10 03:11:25,653 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 [2022-02-10 03:11:25,653 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] [2022-02-10 03:11:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-02-10 03:11:25,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1307. [2022-02-10 03:11:25,665 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) [2022-02-10 03:11:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 3736 transitions. [2022-02-10 03:11:25,667 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 3736 transitions. Word has length 18 [2022-02-10 03:11:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:25,667 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 3736 transitions. [2022-02-10 03:11:25,667 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) [2022-02-10 03:11:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 3736 transitions. [2022-02-10 03:11:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:11:25,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:25,668 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:25,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Ended with exit code 0 [2022-02-10 03:11:25,868 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 [2022-02-10 03:11:25,868 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:11:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:25,869 INFO L85 PathProgramCache]: Analyzing trace with hash 727673377, now seen corresponding path program 389 times [2022-02-10 03:11:25,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:25,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233448223] [2022-02-10 03:11:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:25,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:25,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:25,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233448223] [2022-02-10 03:11:25,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233448223] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:25,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931269196] [2022-02-10 03:11:25,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:11:25,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:25,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:25,973 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) [2022-02-10 03:11:25,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-02-10 03:11:25,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:11:25,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:25,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:11:25,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:26,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:26,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:11:26,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:26,200 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 21 treesize of output 2 [2022-02-10 03:11:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:26,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:26,426 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-02-10 03:11:26,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:11:26,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:11:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:26,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931269196] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:26,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:26,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-02-10 03:11:26,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054393699] [2022-02-10 03:11:26,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:26,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:11:26,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:11:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:11:26,441 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) [2022-02-10 03:11:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:26,877 INFO L93 Difference]: Finished difference Result 1568 states and 4341 transitions. [2022-02-10 03:11:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:11:26,878 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 [2022-02-10 03:11:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:26,880 INFO L225 Difference]: With dead ends: 1568 [2022-02-10 03:11:26,880 INFO L226 Difference]: Without dead ends: 1568 [2022-02-10 03:11:26,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:11:26,880 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 [2022-02-10 03:11:26,880 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] [2022-02-10 03:11:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2022-02-10 03:11:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1305. [2022-02-10 03:11:26,892 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) [2022-02-10 03:11:26,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 3730 transitions. [2022-02-10 03:11:26,894 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 3730 transitions. Word has length 18 [2022-02-10 03:11:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:26,894 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 3730 transitions. [2022-02-10 03:11:26,894 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) [2022-02-10 03:11:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 3730 transitions. [2022-02-10 03:11:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:11:26,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:26,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:26,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Ended with exit code 0 [2022-02-10 03:11:27,096 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 [2022-02-10 03:11:27,096 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:11:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash -349154849, now seen corresponding path program 390 times [2022-02-10 03:11:27,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:27,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122729669] [2022-02-10 03:11:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:27,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:27,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:27,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122729669] [2022-02-10 03:11:27,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122729669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:27,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372279700] [2022-02-10 03:11:27,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:11:27,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:27,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:27,375 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) [2022-02-10 03:11:27,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-02-10 03:11:27,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:11:27,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:27,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:11:27,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:28,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:28,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:28,092 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 [2022-02-10 03:11:28,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:28,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:11:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:28,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:29,497 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:11:29,498 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 [2022-02-10 03:11:29,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:29,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:29,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:29,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:29,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:29,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:29,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:29,557 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 223 treesize of output 321 [2022-02-10 03:11:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:30,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372279700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:30,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:30,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-10 03:11:30,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760450769] [2022-02-10 03:11:30,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:30,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:11:30,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:30,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:11:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:11:30,092 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) [2022-02-10 03:11:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:35,022 INFO L93 Difference]: Finished difference Result 1520 states and 4167 transitions. [2022-02-10 03:11:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-10 03:11:35,022 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 [2022-02-10 03:11:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:35,024 INFO L225 Difference]: With dead ends: 1520 [2022-02-10 03:11:35,024 INFO L226 Difference]: Without dead ends: 1511 [2022-02-10 03:11:35,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=391, Invalid=3641, Unknown=0, NotChecked=0, Total=4032 [2022-02-10 03:11:35,025 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 [2022-02-10 03:11:35,025 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] [2022-02-10 03:11:35,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2022-02-10 03:11:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1317. [2022-02-10 03:11:35,036 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) [2022-02-10 03:11:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 3788 transitions. [2022-02-10 03:11:35,038 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 3788 transitions. Word has length 18 [2022-02-10 03:11:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:35,038 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 3788 transitions. [2022-02-10 03:11:35,038 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) [2022-02-10 03:11:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 3788 transitions. [2022-02-10 03:11:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:11:35,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:35,040 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:35,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-02-10 03:11:35,240 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 [2022-02-10 03:11:35,240 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:11:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:35,241 INFO L85 PathProgramCache]: Analyzing trace with hash -101782113, now seen corresponding path program 391 times [2022-02-10 03:11:35,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:35,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498033625] [2022-02-10 03:11:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:35,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:35,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:35,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498033625] [2022-02-10 03:11:35,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498033625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:35,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252626614] [2022-02-10 03:11:35,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:11:35,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:35,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:35,442 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) [2022-02-10 03:11:35,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-02-10 03:11:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:35,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:11:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:36,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:36,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:36,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:36,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:36,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:36,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:36,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:36,241 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 [2022-02-10 03:11:36,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:36,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:11:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:36,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:37,684 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:11:37,685 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 [2022-02-10 03:11:37,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:37,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:37,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:37,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:37,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:37,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:37,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:37,746 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 [2022-02-10 03:11:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:38,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252626614] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:38,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:38,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-02-10 03:11:38,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524380816] [2022-02-10 03:11:38,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:38,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:11:38,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:11:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:11:38,542 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) [2022-02-10 03:11:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:40,034 INFO L93 Difference]: Finished difference Result 1421 states and 4008 transitions. [2022-02-10 03:11:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:11:40,034 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 [2022-02-10 03:11:40,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:40,036 INFO L225 Difference]: With dead ends: 1421 [2022-02-10 03:11:40,036 INFO L226 Difference]: Without dead ends: 1418 [2022-02-10 03:11:40,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2022-02-10 03:11:40,036 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 [2022-02-10 03:11:40,036 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] [2022-02-10 03:11:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-02-10 03:11:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1316. [2022-02-10 03:11:40,048 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) [2022-02-10 03:11:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 3784 transitions. [2022-02-10 03:11:40,050 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 3784 transitions. Word has length 18 [2022-02-10 03:11:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:40,050 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 3784 transitions. [2022-02-10 03:11:40,050 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) [2022-02-10 03:11:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 3784 transitions. [2022-02-10 03:11:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:11:40,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:40,052 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:40,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Ended with exit code 0 [2022-02-10 03:11:40,252 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 [2022-02-10 03:11:40,252 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:11:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1505739073, now seen corresponding path program 392 times [2022-02-10 03:11:40,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:40,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160755962] [2022-02-10 03:11:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:40,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:40,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:40,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160755962] [2022-02-10 03:11:40,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160755962] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:40,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539445531] [2022-02-10 03:11:40,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:11:40,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:40,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:40,680 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) [2022-02-10 03:11:40,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-02-10 03:11:40,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:11:40,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:40,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-10 03:11:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:41,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:11:41,682 INFO L353 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-02-10 03:11:41,682 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 [2022-02-10 03:11:41,688 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:41,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:11:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:41,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:43,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,592 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-10 03:11:43,593 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 [2022-02-10 03:11:43,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:43,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:43,660 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 [2022-02-10 03:11:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:11:44,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539445531] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:44,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:44,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-10 03:11:44,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969759928] [2022-02-10 03:11:44,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:44,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:11:44,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:44,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:11:44,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:11:44,399 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) [2022-02-10 03:12:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:00,602 INFO L93 Difference]: Finished difference Result 1572 states and 4228 transitions. [2022-02-10 03:12:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-10 03:12:00,602 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 [2022-02-10 03:12:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:00,604 INFO L225 Difference]: With dead ends: 1572 [2022-02-10 03:12:00,604 INFO L226 Difference]: Without dead ends: 1566 [2022-02-10 03:12:00,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=731, Invalid=5749, Unknown=0, NotChecked=0, Total=6480 [2022-02-10 03:12:00,604 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, 1.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:00,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 87 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1545 Invalid, 0 Unknown, 110 Unchecked, 1.2s Time] [2022-02-10 03:12:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-02-10 03:12:00,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1339. [2022-02-10 03:12:00,617 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) [2022-02-10 03:12:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3856 transitions. [2022-02-10 03:12:00,619 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3856 transitions. Word has length 18 [2022-02-10 03:12:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:00,619 INFO L470 AbstractCegarLoop]: Abstraction has 1339 states and 3856 transitions. [2022-02-10 03:12:00,619 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) [2022-02-10 03:12:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3856 transitions. [2022-02-10 03:12:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:12:00,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:00,620 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:00,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-02-10 03:12:00,820 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 [2022-02-10 03:12:00,821 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:12:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash -518101729, now seen corresponding path program 393 times [2022-02-10 03:12:00,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:00,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230817205] [2022-02-10 03:12:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:00,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:01,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:01,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230817205] [2022-02-10 03:12:01,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230817205] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:01,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202832346] [2022-02-10 03:12:01,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:12:01,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:01,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:01,043 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) [2022-02-10 03:12:01,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-02-10 03:12:01,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:12:01,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:01,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:12:01,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:01,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:01,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:01,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:01,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:01,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:01,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:01,800 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 [2022-02-10 03:12:01,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:01,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:12:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:01,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:03,194 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:12:03,195 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 [2022-02-10 03:12:03,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:03,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:03,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:03,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:03,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:03,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:03,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:03,254 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 [2022-02-10 03:12:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:03,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202832346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:03,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:03,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-02-10 03:12:03,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515912008] [2022-02-10 03:12:03,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:03,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:12:03,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:03,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:12:03,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:12:03,999 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) [2022-02-10 03:12:05,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:05,006 INFO L93 Difference]: Finished difference Result 1505 states and 4264 transitions. [2022-02-10 03:12:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:12:05,006 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 [2022-02-10 03:12:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:05,008 INFO L225 Difference]: With dead ends: 1505 [2022-02-10 03:12:05,008 INFO L226 Difference]: Without dead ends: 1495 [2022-02-10 03:12:05,008 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 [2022-02-10 03:12:05,008 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:05,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 503 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2022-02-10 03:12:05,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2022-02-10 03:12:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1387. [2022-02-10 03:12:05,020 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) [2022-02-10 03:12:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 3997 transitions. [2022-02-10 03:12:05,022 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 3997 transitions. Word has length 18 [2022-02-10 03:12:05,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:05,022 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 3997 transitions. [2022-02-10 03:12:05,022 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) [2022-02-10 03:12:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 3997 transitions. [2022-02-10 03:12:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:12:05,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:05,024 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:05,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Ended with exit code 0 [2022-02-10 03:12:05,224 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 [2022-02-10 03:12:05,224 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:12:05,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:05,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1089419457, now seen corresponding path program 394 times [2022-02-10 03:12:05,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:05,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234292159] [2022-02-10 03:12:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:05,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:05,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:05,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234292159] [2022-02-10 03:12:05,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234292159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:05,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909114534] [2022-02-10 03:12:05,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:12:05,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:05,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:05,470 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) [2022-02-10 03:12:05,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-02-10 03:12:05,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:12:05,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:05,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:12:05,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:06,263 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 [2022-02-10 03:12:06,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:06,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:12:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:06,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:07,674 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:12:07,674 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 [2022-02-10 03:12:07,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:07,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:07,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:07,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:07,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:07,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:07,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:07,733 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 [2022-02-10 03:12:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:08,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909114534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:08,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:08,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-10 03:12:08,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132188214] [2022-02-10 03:12:08,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:08,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:12:08,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:08,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:12:08,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:12:08,409 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) [2022-02-10 03:12:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:10,457 INFO L93 Difference]: Finished difference Result 1549 states and 4281 transitions. [2022-02-10 03:12:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 03:12:10,457 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 [2022-02-10 03:12:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:10,459 INFO L225 Difference]: With dead ends: 1549 [2022-02-10 03:12:10,459 INFO L226 Difference]: Without dead ends: 1529 [2022-02-10 03:12:10,459 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 [2022-02-10 03:12:10,460 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 [2022-02-10 03:12:10,460 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] [2022-02-10 03:12:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-02-10 03:12:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1370. [2022-02-10 03:12:10,471 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) [2022-02-10 03:12:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 3942 transitions. [2022-02-10 03:12:10,473 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 3942 transitions. Word has length 18 [2022-02-10 03:12:10,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:10,473 INFO L470 AbstractCegarLoop]: Abstraction has 1370 states and 3942 transitions. [2022-02-10 03:12:10,473 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) [2022-02-10 03:12:10,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 3942 transitions. [2022-02-10 03:12:10,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:12:10,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:10,475 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:10,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-02-10 03:12:10,675 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 [2022-02-10 03:12:10,675 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:12:10,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:10,675 INFO L85 PathProgramCache]: Analyzing trace with hash -539107937, now seen corresponding path program 395 times [2022-02-10 03:12:10,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:10,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47643513] [2022-02-10 03:12:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:10,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:10,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:10,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47643513] [2022-02-10 03:12:10,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47643513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:10,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500608693] [2022-02-10 03:12:10,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:12:10,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:10,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:10,910 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) [2022-02-10 03:12:10,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-02-10 03:12:10,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:12:10,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:10,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:12:10,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:11,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:11,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:11,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:11,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:11,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:11,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:11,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:11,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:11,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:11,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:11,634 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 [2022-02-10 03:12:11,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:11,637 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 58 treesize of output 46 [2022-02-10 03:12:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:11,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:12,963 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:12:12,964 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 [2022-02-10 03:12:12,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:12,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:12,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:12,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:13,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:13,024 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 [2022-02-10 03:12:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:13,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500608693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:13,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:13,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-10 03:12:13,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790293643] [2022-02-10 03:12:13,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:13,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:12:13,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:13,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:12:13,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:12:13,867 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) [2022-02-10 03:12:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:14,947 INFO L93 Difference]: Finished difference Result 1499 states and 4245 transitions. [2022-02-10 03:12:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:12:14,947 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 [2022-02-10 03:12:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:14,950 INFO L225 Difference]: With dead ends: 1499 [2022-02-10 03:12:14,950 INFO L226 Difference]: Without dead ends: 1491 [2022-02-10 03:12:14,950 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 [2022-02-10 03:12:14,950 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 [2022-02-10 03:12:14,950 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] [2022-02-10 03:12:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-02-10 03:12:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1386. [2022-02-10 03:12:14,962 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) [2022-02-10 03:12:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 3991 transitions. [2022-02-10 03:12:14,965 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 3991 transitions. Word has length 18 [2022-02-10 03:12:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:14,965 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 3991 transitions. [2022-02-10 03:12:14,965 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) [2022-02-10 03:12:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 3991 transitions. [2022-02-10 03:12:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:12:14,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:14,966 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:14,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:15,166 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 [2022-02-10 03:12:15,167 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:12:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:15,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1068413249, now seen corresponding path program 396 times [2022-02-10 03:12:15,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:15,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504856771] [2022-02-10 03:12:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:15,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:15,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:15,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504856771] [2022-02-10 03:12:15,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504856771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:15,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136151591] [2022-02-10 03:12:15,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:12:15,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:15,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:15,445 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) [2022-02-10 03:12:15,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-02-10 03:12:15,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:12:15,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:15,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-10 03:12:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:16,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:16,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:16,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:16,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:16,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:16,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:16,319 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 [2022-02-10 03:12:16,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:16,321 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-10 03:12:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:16,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:17,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,937 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-10 03:12:17,938 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 [2022-02-10 03:12:17,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:17,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:18,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:18,002 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 [2022-02-10 03:12:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:19,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136151591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:19,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:19,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-10 03:12:19,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816870241] [2022-02-10 03:12:19,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:19,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:12:19,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:12:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:12:19,492 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) [2022-02-10 03:12:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:37,439 INFO L93 Difference]: Finished difference Result 1686 states and 4483 transitions. [2022-02-10 03:12:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-10 03:12:37,439 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 [2022-02-10 03:12:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:37,441 INFO L225 Difference]: With dead ends: 1686 [2022-02-10 03:12:37,441 INFO L226 Difference]: Without dead ends: 1674 [2022-02-10 03:12:37,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=1032, Invalid=7524, Unknown=0, NotChecked=0, Total=8556 [2022-02-10 03:12:37,442 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 287 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:37,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 63 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1220 Invalid, 0 Unknown, 27 Unchecked, 0.9s Time] [2022-02-10 03:12:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-02-10 03:12:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1404. [2022-02-10 03:12:37,454 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) [2022-02-10 03:12:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4055 transitions. [2022-02-10 03:12:37,457 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4055 transitions. Word has length 18 [2022-02-10 03:12:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:37,457 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4055 transitions. [2022-02-10 03:12:37,457 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) [2022-02-10 03:12:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4055 transitions. [2022-02-10 03:12:37,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:12:37,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:37,458 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:37,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:37,658 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 [2022-02-10 03:12:37,659 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:12:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:37,659 INFO L85 PathProgramCache]: Analyzing trace with hash 312380421, now seen corresponding path program 397 times [2022-02-10 03:12:37,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:37,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26127425] [2022-02-10 03:12:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:37,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:37,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:37,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26127425] [2022-02-10 03:12:37,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26127425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:37,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726067459] [2022-02-10 03:12:37,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:12:37,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:37,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:37,917 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) [2022-02-10 03:12:37,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-02-10 03:12:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:37,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:12:37,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:38,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:38,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:38,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:38,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:38,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:38,660 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 [2022-02-10 03:12:38,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:38,663 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 60 treesize of output 48 [2022-02-10 03:12:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:38,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:40,112 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:12:40,112 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 [2022-02-10 03:12:40,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:40,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:40,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:40,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:40,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:40,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:40,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:40,174 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 [2022-02-10 03:12:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:41,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726067459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:41,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:41,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-10 03:12:41,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434069421] [2022-02-10 03:12:41,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:41,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:12:41,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:12:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:12:41,014 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) [2022-02-10 03:12:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:43,237 INFO L93 Difference]: Finished difference Result 1575 states and 4422 transitions. [2022-02-10 03:12:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-10 03:12:43,237 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 [2022-02-10 03:12:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:43,239 INFO L225 Difference]: With dead ends: 1575 [2022-02-10 03:12:43,239 INFO L226 Difference]: Without dead ends: 1572 [2022-02-10 03:12:43,239 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 [2022-02-10 03:12:43,239 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 [2022-02-10 03:12:43,240 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] [2022-02-10 03:12:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2022-02-10 03:12:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1407. [2022-02-10 03:12:43,252 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) [2022-02-10 03:12:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4064 transitions. [2022-02-10 03:12:43,254 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4064 transitions. Word has length 18 [2022-02-10 03:12:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:43,254 INFO L470 AbstractCegarLoop]: Abstraction has 1407 states and 4064 transitions. [2022-02-10 03:12:43,255 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) [2022-02-10 03:12:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4064 transitions. [2022-02-10 03:12:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:12:43,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:43,256 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:43,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:43,456 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 [2022-02-10 03:12:43,456 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:12:43,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:43,457 INFO L85 PathProgramCache]: Analyzing trace with hash 320110819, now seen corresponding path program 398 times [2022-02-10 03:12:43,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:43,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713898723] [2022-02-10 03:12:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:43,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:43,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:43,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713898723] [2022-02-10 03:12:43,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713898723] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:43,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886523540] [2022-02-10 03:12:43,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:12:43,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:43,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:43,972 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) [2022-02-10 03:12:43,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-02-10 03:12:43,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:12:43,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:43,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:12:43,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:44,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:44,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:44,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:44,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:44,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:44,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:44,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:44,835 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:12:44,835 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 [2022-02-10 03:12:44,841 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:12:44,841 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-02-10 03:12:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:44,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:46,438 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:12:46,438 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 [2022-02-10 03:12:46,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:46,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:46,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:46,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:46,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:46,500 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 [2022-02-10 03:12:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:47,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886523540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:47,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:47,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-10 03:12:47,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009899574] [2022-02-10 03:12:47,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:47,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:47,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:47,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:47,219 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) [2022-02-10 03:12:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:50,002 INFO L93 Difference]: Finished difference Result 1560 states and 4377 transitions. [2022-02-10 03:12:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 03:12:50,003 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 [2022-02-10 03:12:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:50,005 INFO L225 Difference]: With dead ends: 1560 [2022-02-10 03:12:50,005 INFO L226 Difference]: Without dead ends: 1551 [2022-02-10 03:12:50,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=284, Invalid=2578, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:12:50,005 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 [2022-02-10 03:12:50,005 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] [2022-02-10 03:12:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2022-02-10 03:12:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1357. [2022-02-10 03:12:50,018 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) [2022-02-10 03:12:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3921 transitions. [2022-02-10 03:12:50,020 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3921 transitions. Word has length 18 [2022-02-10 03:12:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:50,020 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 3921 transitions. [2022-02-10 03:12:50,020 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) [2022-02-10 03:12:50,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3921 transitions. [2022-02-10 03:12:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:12:50,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:50,021 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:50,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Ended with exit code 0 [2022-02-10 03:12:50,222 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 [2022-02-10 03:12:50,222 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:12:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:50,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1927632005, now seen corresponding path program 399 times [2022-02-10 03:12:50,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:50,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530830928] [2022-02-10 03:12:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:50,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:50,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:50,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530830928] [2022-02-10 03:12:50,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530830928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:50,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580978386] [2022-02-10 03:12:50,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:12:50,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:50,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:50,568 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) [2022-02-10 03:12:50,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-02-10 03:12:50,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:12:50,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:50,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:12:50,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:51,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:51,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:51,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:51,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:51,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:51,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:51,350 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 [2022-02-10 03:12:51,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:51,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:12:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:51,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:52,816 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:12:52,816 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 [2022-02-10 03:12:52,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:52,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:52,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:52,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:52,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:52,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:52,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:52,878 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 [2022-02-10 03:12:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:53,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580978386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:53,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:53,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-02-10 03:12:53,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102223028] [2022-02-10 03:12:53,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:53,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:53,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:53,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:53,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:53,857 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) [2022-02-10 03:12:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:55,657 INFO L93 Difference]: Finished difference Result 1515 states and 4230 transitions. [2022-02-10 03:12:55,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:12:55,657 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 [2022-02-10 03:12:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:55,659 INFO L225 Difference]: With dead ends: 1515 [2022-02-10 03:12:55,659 INFO L226 Difference]: Without dead ends: 1507 [2022-02-10 03:12:55,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2022-02-10 03:12:55,659 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 [2022-02-10 03:12:55,659 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] [2022-02-10 03:12:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-02-10 03:12:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1366. [2022-02-10 03:12:55,671 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) [2022-02-10 03:12:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 3954 transitions. [2022-02-10 03:12:55,673 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 3954 transitions. Word has length 18 [2022-02-10 03:12:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:55,673 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 3954 transitions. [2022-02-10 03:12:55,673 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) [2022-02-10 03:12:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 3954 transitions. [2022-02-10 03:12:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:12:55,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:55,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:55,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-02-10 03:12:55,875 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 [2022-02-10 03:12:55,875 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:12:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:55,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1190300385, now seen corresponding path program 400 times [2022-02-10 03:12:55,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:55,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112016826] [2022-02-10 03:12:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:55,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:56,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:56,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112016826] [2022-02-10 03:12:56,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112016826] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:56,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029226723] [2022-02-10 03:12:56,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:12:56,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:56,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:56,845 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) [2022-02-10 03:12:56,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-02-10 03:12:56,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:12:56,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:56,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:12:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:57,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:57,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:57,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:12:57,731 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:12:57,731 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 [2022-02-10 03:12:57,737 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:12:57,737 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 62 treesize of output 53 [2022-02-10 03:12:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:12:57,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:59,354 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:12:59,354 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 [2022-02-10 03:12:59,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:59,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:59,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:59,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:59,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:59,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:59,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:59,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 [2022-02-10 03:13:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:00,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029226723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:00,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:00,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-10 03:13:00,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806635815] [2022-02-10 03:13:00,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:00,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:00,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:00,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:00,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:00,269 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) [2022-02-10 03:13:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:02,166 INFO L93 Difference]: Finished difference Result 1466 states and 4183 transitions. [2022-02-10 03:13:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:13:02,166 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 [2022-02-10 03:13:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:02,168 INFO L225 Difference]: With dead ends: 1466 [2022-02-10 03:13:02,168 INFO L226 Difference]: Without dead ends: 1460 [2022-02-10 03:13:02,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=163, Invalid=1907, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:13:02,169 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-02-10 03:13:02,169 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] [2022-02-10 03:13:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-02-10 03:13:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1369. [2022-02-10 03:13:02,186 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) [2022-02-10 03:13:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 3963 transitions. [2022-02-10 03:13:02,189 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 3963 transitions. Word has length 18 [2022-02-10 03:13:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:02,189 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 3963 transitions. [2022-02-10 03:13:02,189 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) [2022-02-10 03:13:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 3963 transitions. [2022-02-10 03:13:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:13:02,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:02,191 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:02,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-02-10 03:13:02,405 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 [2022-02-10 03:13:02,405 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:13:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2146268135, now seen corresponding path program 401 times [2022-02-10 03:13:02,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:02,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842767428] [2022-02-10 03:13:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:02,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:03,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:03,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842767428] [2022-02-10 03:13:03,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842767428] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:03,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716807212] [2022-02-10 03:13:03,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:13:03,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:03,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:03,034 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) [2022-02-10 03:13:03,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-02-10 03:13:03,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:13:03,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:03,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:13:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:03,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:03,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:03,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:03,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:03,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:03,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:03,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:03,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:03,892 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 [2022-02-10 03:13:03,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:03,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:13:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:03,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:05,282 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:13:05,282 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 [2022-02-10 03:13:05,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:05,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:05,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:05,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:05,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:05,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:05,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:05,345 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 [2022-02-10 03:13:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:06,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716807212] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:06,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:06,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-02-10 03:13:06,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024623594] [2022-02-10 03:13:06,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:06,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:13:06,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:13:06,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:06,064 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) [2022-02-10 03:13:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:08,684 INFO L93 Difference]: Finished difference Result 1507 states and 4249 transitions. [2022-02-10 03:13:08,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:13:08,684 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 [2022-02-10 03:13:08,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:08,686 INFO L225 Difference]: With dead ends: 1507 [2022-02-10 03:13:08,686 INFO L226 Difference]: Without dead ends: 1501 [2022-02-10 03:13:08,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=224, Invalid=2638, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:13:08,687 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:08,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 45 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 872 Invalid, 0 Unknown, 228 Unchecked, 0.5s Time] [2022-02-10 03:13:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-02-10 03:13:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1377. [2022-02-10 03:13:08,698 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) [2022-02-10 03:13:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3987 transitions. [2022-02-10 03:13:08,701 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3987 transitions. Word has length 18 [2022-02-10 03:13:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:08,701 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 3987 transitions. [2022-02-10 03:13:08,701 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) [2022-02-10 03:13:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3987 transitions. [2022-02-10 03:13:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:13:08,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:08,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:08,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Ended with exit code 0 [2022-02-10 03:13:08,902 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 [2022-02-10 03:13:08,903 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:13:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:08,903 INFO L85 PathProgramCache]: Analyzing trace with hash -625694937, now seen corresponding path program 402 times [2022-02-10 03:13:08,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:08,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57375494] [2022-02-10 03:13:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:08,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:09,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:09,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57375494] [2022-02-10 03:13:09,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57375494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:09,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507305889] [2022-02-10 03:13:09,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:13:09,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:09,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:09,392 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) [2022-02-10 03:13:09,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-02-10 03:13:09,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:13:09,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:09,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:13:09,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:10,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:10,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:10,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:10,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:10,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:10,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:10,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:10,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:10,263 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 [2022-02-10 03:13:10,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:10,266 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-02-10 03:13:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:10,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:11,646 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:13:11,647 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 [2022-02-10 03:13:11,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:11,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:11,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:11,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:11,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:11,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:11,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:11,710 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 [2022-02-10 03:13:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:12,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507305889] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:12,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:12,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-02-10 03:13:12,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735729186] [2022-02-10 03:13:12,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:12,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:13:12,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:12,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:13:12,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:12,455 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) [2022-02-10 03:13:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:13,737 INFO L93 Difference]: Finished difference Result 1481 states and 4206 transitions. [2022-02-10 03:13:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-10 03:13:13,737 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 [2022-02-10 03:13:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:13,740 INFO L225 Difference]: With dead ends: 1481 [2022-02-10 03:13:13,740 INFO L226 Difference]: Without dead ends: 1475 [2022-02-10 03:13:13,740 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 [2022-02-10 03:13:13,740 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-02-10 03:13:13,740 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] [2022-02-10 03:13:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2022-02-10 03:13:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1377. [2022-02-10 03:13:13,752 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) [2022-02-10 03:13:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3987 transitions. [2022-02-10 03:13:13,754 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3987 transitions. Word has length 18 [2022-02-10 03:13:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:13,755 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 3987 transitions. [2022-02-10 03:13:13,755 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) [2022-02-10 03:13:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3987 transitions. [2022-02-10 03:13:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:13:13,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:13,756 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:13,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Ended with exit code 0 [2022-02-10 03:13:13,956 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 [2022-02-10 03:13:13,957 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:13:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash 405932643, now seen corresponding path program 403 times [2022-02-10 03:13:13,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:13,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218267703] [2022-02-10 03:13:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:13,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:14,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:14,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218267703] [2022-02-10 03:13:14,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218267703] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:14,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521866196] [2022-02-10 03:13:14,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:13:14,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:14,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:14,392 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) [2022-02-10 03:13:14,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-02-10 03:13:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:14,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:13:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:15,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:15,083 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 [2022-02-10 03:13:15,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:15,086 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 60 treesize of output 48 [2022-02-10 03:13:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:15,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:16,522 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:13:16,522 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 [2022-02-10 03:13:16,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:16,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:16,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:16,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:16,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:16,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:16,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:16,584 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 [2022-02-10 03:13:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:17,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521866196] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:17,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:17,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-02-10 03:13:17,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459380379] [2022-02-10 03:13:17,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:17,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:13:17,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:17,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:13:17,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:13:17,426 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) [2022-02-10 03:13:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:23,445 INFO L93 Difference]: Finished difference Result 1664 states and 4575 transitions. [2022-02-10 03:13:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-10 03:13:23,445 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 [2022-02-10 03:13:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:23,447 INFO L225 Difference]: With dead ends: 1664 [2022-02-10 03:13:23,447 INFO L226 Difference]: Without dead ends: 1647 [2022-02-10 03:13:23,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:13:23,447 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:23,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 97 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-10 03:13:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2022-02-10 03:13:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1461. [2022-02-10 03:13:23,466 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) [2022-02-10 03:13:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4228 transitions. [2022-02-10 03:13:23,468 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4228 transitions. Word has length 18 [2022-02-10 03:13:23,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:23,468 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 4228 transitions. [2022-02-10 03:13:23,468 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) [2022-02-10 03:13:23,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4228 transitions. [2022-02-10 03:13:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:13:23,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:23,469 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:23,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Forceful destruction successful, exit code 0 [2022-02-10 03:13:23,670 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 [2022-02-10 03:13:23,670 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:13:23,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:23,670 INFO L85 PathProgramCache]: Analyzing trace with hash -507716735, now seen corresponding path program 404 times [2022-02-10 03:13:23,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:23,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858594557] [2022-02-10 03:13:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:23,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:23,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:23,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858594557] [2022-02-10 03:13:23,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858594557] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:23,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596306036] [2022-02-10 03:13:23,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:13:23,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:23,842 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) [2022-02-10 03:13:23,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-02-10 03:13:23,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:13:23,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:23,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-10 03:13:23,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:24,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:24,595 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 [2022-02-10 03:13:24,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:24,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:13:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:24,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:26,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,524 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-02-10 03:13:26,525 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 [2022-02-10 03:13:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:26,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:26,590 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 [2022-02-10 03:13:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:28,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596306036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:28,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:28,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-02-10 03:13:28,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475233426] [2022-02-10 03:13:28,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:28,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:13:28,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:13:28,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:13:28,070 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) [2022-02-10 03:13:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:42,228 INFO L93 Difference]: Finished difference Result 1731 states and 4716 transitions. [2022-02-10 03:13:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-10 03:13:42,228 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 [2022-02-10 03:13:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:42,230 INFO L225 Difference]: With dead ends: 1731 [2022-02-10 03:13:42,230 INFO L226 Difference]: Without dead ends: 1718 [2022-02-10 03:13:42,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2235 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=834, Invalid=6648, Unknown=0, NotChecked=0, Total=7482 [2022-02-10 03:13:42,231 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 [2022-02-10 03:13:42,231 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] [2022-02-10 03:13:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-02-10 03:13:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1361. [2022-02-10 03:13:42,244 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) [2022-02-10 03:13:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 3931 transitions. [2022-02-10 03:13:42,254 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 3931 transitions. Word has length 18 [2022-02-10 03:13:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:42,254 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 3931 transitions. [2022-02-10 03:13:42,254 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) [2022-02-10 03:13:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 3931 transitions. [2022-02-10 03:13:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:13:42,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:42,256 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:42,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Ended with exit code 0 [2022-02-10 03:13:42,456 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 [2022-02-10 03:13:42,456 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:13:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:42,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2018127939, now seen corresponding path program 405 times [2022-02-10 03:13:42,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:42,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469678875] [2022-02-10 03:13:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:42,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:42,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:42,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469678875] [2022-02-10 03:13:42,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469678875] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:42,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730614182] [2022-02-10 03:13:42,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:13:42,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:42,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:42,721 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) [2022-02-10 03:13:42,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-02-10 03:13:42,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:13:42,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:42,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-10 03:13:42,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:43,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:43,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:43,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:43,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:43,498 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 [2022-02-10 03:13:43,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:43,501 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 79 treesize of output 63 [2022-02-10 03:13:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:43,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:45,341 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:13:45,341 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 [2022-02-10 03:13:45,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:45,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:45,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:45,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:45,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:45,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:45,402 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 [2022-02-10 03:13:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:47,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730614182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:47,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:47,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-02-10 03:13:47,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914190806] [2022-02-10 03:13:47,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:47,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:13:47,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:47,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:13:47,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:47,247 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) [2022-02-10 03:13:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:54,656 INFO L93 Difference]: Finished difference Result 1536 states and 4322 transitions. [2022-02-10 03:13:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-10 03:13:54,656 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 [2022-02-10 03:13:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:54,658 INFO L225 Difference]: With dead ends: 1536 [2022-02-10 03:13:54,658 INFO L226 Difference]: Without dead ends: 1525 [2022-02-10 03:13:54,658 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 [2022-02-10 03:13:54,659 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 [2022-02-10 03:13:54,659 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] [2022-02-10 03:13:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-02-10 03:13:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1407. [2022-02-10 03:13:54,671 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) [2022-02-10 03:13:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4084 transitions. [2022-02-10 03:13:54,673 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4084 transitions. Word has length 18 [2022-02-10 03:13:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:54,673 INFO L470 AbstractCegarLoop]: Abstraction has 1407 states and 4084 transitions. [2022-02-10 03:13:54,673 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) [2022-02-10 03:13:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4084 transitions. [2022-02-10 03:13:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:13:54,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:54,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:54,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Ended with exit code 0 [2022-02-10 03:13:54,875 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 [2022-02-10 03:13:54,875 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:13:54,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:54,875 INFO L85 PathProgramCache]: Analyzing trace with hash -410606753, now seen corresponding path program 406 times [2022-02-10 03:13:54,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:54,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28416121] [2022-02-10 03:13:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:54,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:55,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:55,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28416121] [2022-02-10 03:13:55,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28416121] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:55,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111819581] [2022-02-10 03:13:55,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:13:55,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:55,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:55,161 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) [2022-02-10 03:13:55,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-02-10 03:13:55,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:13:55,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:55,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-10 03:13:55,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:55,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:55,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:55,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:55,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:55,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:13:55,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:55,949 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 [2022-02-10 03:13:55,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:55,951 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 58 treesize of output 46 [2022-02-10 03:13:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:13:55,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:57,367 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-02-10 03:13:57,368 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 [2022-02-10 03:13:57,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:57,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:57,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:57,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:57,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:57,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:57,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:57,428 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 Received shutdown request... [2022-02-10 03:13:57,571 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-10 03:13:57,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-02-10 03:13:57,592 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 [2022-02-10 03:13:57,614 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 03:13:57,783 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 [2022-02-10 03:13:57,783 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-5-2-2-2-3-2-2-3-1 context. [2022-02-10 03:13:57,785 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-10 03:13:57,785 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-10 03:13:57,786 INFO L732 BasicCegarLoop]: Path program histogram: [406, 6, 6, 2] [2022-02-10 03:13:57,788 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-10 03:13:57,788 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 03:13:57,789 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 03:13:57 BasicIcfg [2022-02-10 03:13:57,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 03:13:57,790 INFO L158 Benchmark]: Toolchain (without parser) took 789433.71ms. Allocated memory was 196.1MB in the beginning and 306.2MB in the end (delta: 110.1MB). Free memory was 153.8MB in the beginning and 246.8MB in the end (delta: -93.0MB). Peak memory consumption was 191.1MB. Max. memory is 8.0GB. [2022-02-10 03:13:57,790 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 196.1MB. Free memory is still 154.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 03:13:57,790 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.48ms. Allocated memory is still 196.1MB. Free memory was 153.7MB in the beginning and 152.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:13:57,790 INFO L158 Benchmark]: Boogie Preprocessor took 13.42ms. Allocated memory is still 196.1MB. Free memory was 152.1MB in the beginning and 151.2MB in the end (delta: 912.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:13:57,790 INFO L158 Benchmark]: RCFGBuilder took 185.04ms. Allocated memory is still 196.1MB. Free memory was 151.1MB in the beginning and 140.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-10 03:13:57,790 INFO L158 Benchmark]: TraceAbstraction took 789214.55ms. Allocated memory was 196.1MB in the beginning and 306.2MB in the end (delta: 110.1MB). Free memory was 140.0MB in the beginning and 246.8MB in the end (delta: -106.8MB). Peak memory consumption was 176.5MB. Max. memory is 8.0GB. [2022-02-10 03:13:57,790 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 0.12ms. Allocated memory is still 196.1MB. Free memory is still 154.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.48ms. Allocated memory is still 196.1MB. Free memory was 153.7MB in the beginning and 152.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.42ms. Allocated memory is still 196.1MB. Free memory was 152.1MB in the beginning and 151.2MB in the end (delta: 912.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 185.04ms. Allocated memory is still 196.1MB. Free memory was 151.1MB in the beginning and 140.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 789214.55ms. Allocated memory was 196.1MB in the beginning and 306.2MB in the end (delta: 110.1MB). Free memory was 140.0MB in the beginning and 246.8MB in the end (delta: -106.8MB). Peak memory consumption was 176.5MB. 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 analyzing trace of length 19 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-5-2-2-2-3-2-2-3-1 context. - 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 analyzing trace of length 19 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-5-2-2-2-3-2-2-3-1 context. - 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 analyzing trace of length 19 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-5-2-2-2-3-2-2-3-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 789.2s, OverallIterations: 420, TraceHistogramMax: 5, PathProgramHistogramMax: 406, EmptinessCheckTime: 0.3s, AutomataDifference: 339.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25383 SdHoareTripleChecker+Valid, 98.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25383 mSDsluCounter, 27547 SdHoareTripleChecker+Invalid, 83.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 16011 IncrementalHoareTripleChecker+Unchecked, 69719 mSDsCounter, 8409 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 225476 IncrementalHoareTripleChecker+Invalid, 249896 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8409 mSolverCounterUnsat, 2320 mSDtfsCounter, 225476 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21783 GetRequests, 8118 SyntacticMatches, 1118 SemanticMatches, 12547 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97450 ImplicationChecksByTransitivity, 361.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1461occurred in iteration=417, InterpolantAutomatonStates: 9728, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 419 MinimizatonAttempts, 45705 StatesRemovedByMinimization, 419 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 346.1s InterpolantComputationTime, 13136 NumberOfCodeBlocks, 13136 NumberOfCodeBlocksAsserted, 1398 NumberOfCheckSat, 18413 ConstructedInterpolants, 500 QuantifiedInterpolants, 355089 SizeOfPredicates, 3918 NumberOfNonLiveVariables, 30844 ConjunctsInSsa, 10237 ConjunctsInUnsatCore, 1237 InterpolantComputations, 10 PerfectInterpolantSequences, 2073/15392 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